CN105462877B - One plant of lignocellulosic substance efficient degrading bacteria II5 and its application - Google Patents
One plant of lignocellulosic substance efficient degrading bacteria II5 and its application Download PDFInfo
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Abstract
One plant of lignocellulosic substance efficient degrading bacteria II5 and its application, it is related to one plant of lignocellulosic substance efficient degrading bacteria II5 and its application.It is Exiguobacterium sp (Exiguobacterium sp.) II5, on December 12nd, 2014 in China Committee for Culture Collection of Microorganisms's common micro-organisms center's preservation, deposit number CGMCC No.10167.It is used for lignocellulose degradation substance.Bacterial strain of the present invention has increment rapidly, adaptable, is widely used；The weight-loss ratio of Bag Material agaric waste material after Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process is 36% or more, and the weight-loss ratio of the corn stover after Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process is 30% or more.
Description
Technical field
The present invention relates to one plant of lignocellulosic substance efficient degrading bacteria II5 and its applications.
Background technique
China is a large agricultural country, and agricultural wastes yield is extremely huge, due to universal by economic benefit and technology
Limitation, the mostly extensive inefficient utilization of agricultural wastes and idle situation is serious results in waste of resources and environmental pollution, waste
Have become the pollution sources of Largest In China.And in agricultural wastes, there is a large amount of lignocellulosics, it would be highly desirable to which people go to develop
It utilizes.
Lignocellulosic is second organic renewable resource abundant and the microorganism that cellulose is only second in nature
It is most difficult to one of the ingredient of degradation.In recent years, the fungi of certain lignin degradings has started to be applied in practice, but still needs
Further exploitation.The application of lignin microbial degradation mainly has: paper industry；Feed industry；Fermentation and food industry；Biology
Object fertilizer environmental protection；Bio-bleaching technology of ligninase, etc..
Agricultural organic solid is discarded at present usually passes through recovery energy, organic fertilizer, poultry and livestock feed, the culture of edible bacterium
Base-material and the raw material of industry are utilized.In the production practices using agricultural wastes, physics, chemistry and bioremediation warp
Often it is used in combination, and wherein bioremediation especially with microbiological treatment represents development trend from now on.Biology side
Method just refers to the lignin gone in degradation lignocellulosic material using lignin-degrading enzymes, to make lignin-hemicellulose-fibre
It ties up plain structure to disintegrate, cellulose is able to be exposed for subsequent step processing compared with traditional machinery, physical chemistry class method, raw
The advantages of object facture is that low energy consumption, and required environmental condition is mild, avoids the energy consumption such as traditional chemical processing, mechanical treatment technology
More, the disadvantages of there are environmental pollutions, consider from cost and equipment angle, biological delignification's method occupies unique advantage.But
It is that current biological treatment has a very big weakness to limit its application, and here it is the angled key in biological treatment
Color-lignin-degrading enzymes activity is not universal high, lower so as to cause treatment effeciency, if genetic engineering and traditional can be utilized
Biotechnology is transformed strain and enzyme, improves enzyme activity, reduces enzyme cost, and bioanalysis delignification rule is expected to be applied to
Large-scale industrial production.
And most widely used at present is microbial-bacterial fertilizer, the microbial-bacterial fertilizer agrotechnical measure new as one kind,
The effect developed in an agriculture featuring high yields, fine quality and high efficiency is gradually recognized by people.Traditional microbial manure is own to be pushed away in large area
In wide application, novel microbial-bacterial fertilizer kind is continually developed out.Microorganism fertilizer is by the microorganism warp with special efficiency
Everfermentation and it is manufactured, containing a large amount of beneficial microbes, have the specified microorganisms product of specific fertilizer efficiency to crop.Microbial manure
Using the vital movement of microorganism, the nutrients utilized can be absorbed by crops by converting the substance that crop cannot be absorbed and utilized to,
Improve the nutritional condition of crop, some effects for having stimulation plant growth concurrently or enhancing disease resistance improve to improve crop yield
Quality of agricultural product.It not only can increase earning foreign exchange day out for agricultural product, but also has the effective use of industrial or agricultural debirs, prevents environment dirty
Dye, the great social profit and ecological benefits for improving soil texture, increasing soil fertility with protecting ecology benign cycle.
Most of domestic research is fungus degrading lignocellulosic.But it is universal using fungus degrading lignocellulosic
There is a problem of that enzyme activity is lower.Since bacterial reproduction is very fast, fermentation period is short, can be applied to industrial production, and bacterium generates
Cellulase general action condition be neutral or meta-alkalescence, this is useless the pollution industry such as slurrying, papermaking and detergent industry
There is potential application prospect on water harnessing, therefore filter out effective strain from bacterium to have applied to ligocellulose degradation
Certain practical significance and development prospect.
Summary of the invention
The purpose of the invention is to provide one plant of lignin efficient degrading bacteria II5 and its application.
One plant of lignin efficient degrading bacteria of the invention is Exiguobacterium sp category (Exiguobacterium sp.) II5, preservation
In China Committee for Culture Collection of Microorganisms's common micro-organisms center, preservation address is BeiChen West Road, Chaoyang District, BeiJing City 1
Number institute 3, the deposit date is on December 12nd, 2014, deposit number CGMCC No.10167.
One plant of lignin efficient degrading bacteria II5 of the invention is used for lignin degrading.
Beneficial effects of the present invention are as follows:
Exiguobacterium sp (Exiguobacterium sp.) II5 increment of the invention is rapidly, adaptable, is widely used；Even
Continuous secondary culture 10 times, strain growth situation, producing enzyme situation and enzyme activity are stablized, no degradation phenomena；To Bag Material agaric waste material
There is apparent degradation effect with corn stover, the bag after Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process
Expect jade of the weight-loss ratio of agaric waste material 36% or more, after Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process
The weight-loss ratio of rice stalk is 30% or more；It, can be with high-efficiency lignin degrading, through compound micro- with significant lignin degradation ability
Content of lignin is sent out through Exiguobacterium sp (Exiguobacterium sp.) II5 in the corn stover of bacteria agent fermentation process
1.6 times of content of lignin in the corn stover of ferment processing, as single bacterial strain Exiguobacterium sp (Exiguobacterium sp.)
II5 is better than complex micro organism fungicide to the degradation capability of lignin；When degrading sample, the essential element not influenced in sample contains
Amount not will lead to full nitrogen, full phosphorus, full potassium, rapid available phosphorus and quick-acting potassium content variation in sample, save sample fertilizer efficiency.
It to be unique with lignin that the present invention is separated from Bag Material agaric waste material, woodland rotten wood and forest fieid soil
The original strain of carbon source for growth determines degradation capability and race relation to lignin, is complex micro organism fungicide in future structure
It builds and lays the foundation.It is provided strong help being utilized for the validation of China's agricultural resource.
Detailed description of the invention
Fig. 1 is that Exiguobacterium sp category of the present invention (Exiguobacterium sp.) II5 cultivates the scanning electron microscopy after 12h
Mirror figure (× 20,000)；
Fig. 2 is that the agarose gel electrophoresis detection of 16S rDNA sequence PCR amplification is schemed wherein, and 1 swimming lane is Maker
DL2000,2 swimming lanes are bacterial strain II5；
Fig. 3 is that PCR product agarose gel electrophoresis after the recovery detection is schemed wherein, and 1 swimming lane is Maker DL2000,2 swimming
Road is bacterial strain II5；
Fig. 4 is that the agarose gel electrophoresis detection of positive clone molecule screening is schemed wherein, and 1 swimming lane is Maker DL2000,2 swimming
Road is bacterial strain II5；
Fig. 5 is the systematic evolution tree of Exiguobacterium sp category of the present invention (Exiguobacterium sp.) II5；
Fig. 6 is weight-loss ratio figure of Exiguobacterium sp of the present invention (Exiguobacterium sp.) II5 to Bag Material agaric waste material；
Fig. 7 is weight-loss ratio figure of Exiguobacterium sp of the present invention (Exiguobacterium sp.) II5 to corn stover；
Fig. 8 is each component in corn stover after Exiguobacterium sp of the present invention (Exiguobacterium sp.) II5 strains for degrading
Content histogram；Wherein, 1 is content of lignin histogram；2 be content of cellulose histogram；3 be hemicellulose level column
Figure；
Fig. 9 is complete in corn stover after Exiguobacterium sp of the present invention (Exiguobacterium sp.) II5 strain fermentation is handled
The full phosphorus of nitrogen and full potassium content histogram；Wherein, 1 is total nitrogen content histogram；2 be content of tatal phosphorus histogram；3 be full potassium content column
Shape figure；
Figure 10 is in corn stover after the processing of Exiguobacterium sp of the present invention (Exiguobacterium sp.) II5 strain fermentation
Available phosphorus contents histogram；
Figure 11 is in corn stover after the processing of Exiguobacterium sp of the present invention (Exiguobacterium sp.) II5 strain fermentation
Quick-acting potassium content histogram.
Specific embodiment
Specific embodiment 1: one plant of lignocellulosic substance efficient degrading bacteria II5 of present embodiment, it is small
Bacillus (Exiguobacterium sp.) II5, is deposited in China Committee for Culture Collection of Microorganisms's common micro-organisms
The heart, preservation address are Yard 1, BeiChen xi Road, Chaoyang District, Beijing City 3s, and the deposit date is on December 12nd, 2014, deposit numbers
CGMCC NO.10167。
Exiguobacterium sp (Exiguobacterium sp.) II5 of present embodiment is gram-positive bacteria, the bacterial strain young age
Thalli morphology is in the shape of a rod, mature thallus is in spherical, and young age thallus size is 0.61~0.67 × 1.8~1.9 μm, and mature thallus is straight
Diameter is 0.59~0.65 μm, does not form gemma, atrichia and pod membrane；On LB culture medium formed it is round, opaque, orange-yellow,
Flat, smooth, neat in edge bacterium colony (as shown in Figure 1).
The biochemical reactions result of the bacterial strain totally 18,28 indexs；Combining form and biochemical reactions as a result, than
The kind of the bacterial strain is determined to " primary Jie Shi Bacteria Identification handbook ", the results are shown in Table 1.
According to " common bacteria system identification handbook " and " the outstanding bacterium handbook of uncle " to the Exiguobacterium sp isolated
(Exiguobacterium sp.) II5 carries out carry out Gram's staining, oxidizing ferment, catalase, fluorchrome, methyl red, seven leaves
Glycosides dissolution, gelatin liquefaction, litmus milk peptonize and produce acid, lipase, Starch Hydrolysis, V.P. measurement, citrate utilization, cellulose
It is degradation, 3- ketone group lactose utilization, phenylalanine deaminase, tryptophan deaminase, heat-resisting hot, salt tolerance bio-chemical characteristics
Detection and identification.The result shows that Exiguobacterium sp (Exiguobacterium sp.) II5 is gram-positive bacteria, salt tolerance is
NaCl concentration 10%, heat resistance are 50 DEG C, can produce catalase and tryptophan deaminase, but cannot generate oxidizing ferment, lipase, benzene
Alanine deaminase and fluorchrome, methyl red, citrate utilize, aesculin dissolution and litmus milk produce acid and show as sun
Property, V.P. test, Starch Hydrolysis, gelatin liquefaction, litmus milk peptonizes, cellulose degradation and 3- ketone group lactose utilization show as yin
Property.
The morphological feature and Physiology and biochemistry qualification result of 1 bacterial strain II5 of table
The lignin efficient degrading bacteria of present embodiment is the sieve of Exiguobacterium sp category (Exiguobacterium sp.) II5
Choosing method is as follows:
1, screening technique
It takes 10g sample to be aseptically fully ground, is added in the triangular flask equipped with 90mL sterile water (with bead),
Vibrate 20min.Take the access of 5mL sample suspension equipped in the triangular flask of 100mL LB liquid medium, 37 DEG C, 180r/min vibrates
Cultivate 8h；The sample liquid that dilution is 10-1,10-2,10-3,10-4,10-5,10-6 is respectively prepared in bacterium solution, 200 μ L is respectively taken to apply
In lignin screening and culturing medium plate, 37 DEG C of constant temperature incubation 48h adjust dilution gradient according to bacterium colony growing state.Keep culture
Condition is constant, the scribing line purifying repeatedly on lignin screening and culturing medium plate of the single colonie after 48h on each plate of picking.Picking is pure
Single bacterium drop point after change is connected to lignin aniline blue culture medium flat plate, and 37 DEG C are protected from light constant temperature incubation 48h, measures the transparent of each bacterial strain
Loop diameter H and colony diameter C, filters out the biggish bacterial strain of H/C value.Squamous subculture, continuous passage 10 are carried out to the bacterial strain of acquisition
It is secondary, it observes the upgrowth situation of bacterial strain and measures H/C value.According to bacterial strain respectively for colonial morphology, colony diameter, transparent loop diameter and
H/C value size determines strain growth situation and protects to -80 DEG C of Freezing Glycerine methods of stability use of lignin degradation effect
It deposits, isolated strains save 3 pipes, write label (strain number, separately point, Habitat Types and holding time) exactly.
2, bacterial strain H/C value measures
Bacterial strain point is connected to lignin aniline blue culture medium flat plate, 37 DEG C are protected from light constant temperature incubation 48h, measure the saturating of each bacterial strain
Bright loop diameter H and colony diameter C.
3, interpretation of result:
3.1, bacterial strain screening
By above-mentioned separation screening process, 134 plants of bacterial strains that can be grown on lignin screening and culturing medium are obtained altogether.It will
This 134 plants of bacterial strains are inoculated on lignin aniline blue culture medium after purification and are screened, according to transparent circle generation time, clarity
Lignin-degrading bacteria is filtered out with H/C value size.It is rapidly and clear that bacterial strain II5 transparent circle generates, the biggish bacterial strain of H/C value,
It is determined as efficient lignin-degrading bacteria, according to the sample source of bacterium, numbers respectively.Above-mentioned bacterial strains are subjected to 10 passages
After culture, the H/C value of bacterial strain bacterium colony growing state, mode of appearance and bacterial strain has no significant change, show strain growth situation,
Producing enzyme situation and enzyme activity are stablized, no degradation phenomena.
3.2, bacterial strain H/C value measures
The generation of bacterial strain II5 transparent circle is clear rapid, and H/C value is larger；After 10 secondary cultures, the growth of the bacterial strain
Situation, producing enzyme situation and enzyme activity are stablized, and no degradation phenomena surveys the transparent loop diameter H and colony diameter C of this plant of bacterium
The analysis of fixed and data.The average colony diameter of bacterial strain II5 is 0.57 ± 0.02cm, and maximum colony diameter reaches 0.59cm；
Averagely degradation loop diameter is 1.35 ± 0.02cm, and most degradation loop diameter can reach 1.38cm.The average H/C value of bacterial strain II5 is
2.39 ± 0.09, maximum H/C value can reach 2.56.
2 II5 strains for degrading effect of table
4, the extraction of genomic DNA
The bacterial strain II5 genomic DNA that above-mentioned screening is obtained is extracted using hot broken wall method.1mL is taken to be inoculated in the training of LB liquid
The feeding bacteria suspension of 37 DEG C of 180r/min shaken cultivations of base for 24 hours, is squeezed into 1.5mL centrifuge tube, 5000r/min centrifugation 5min, in abandoning
Clearly, 1mL ddH is added2O, suction are beaten uniformly, and thallus is made to suspend, and 5000r/min is centrifuged 5min, abandon supernatant, and 200 μ L ddH are added2O,
Suction is beaten uniformly, and thallus is made to suspend；8~10min in boiling water bath, 10000r/min are centrifuged 10min.Aspirate supernatant is transferred to
In another 1.5mL centrifuge tube, 5 μ L point samples are taken, are Marker with λ EcoT14, the detection of 1% agarose gel electrophoresis, remaining -20
DEG C save.
5, the PCR amplification of 16S rDNA
Using 16S rDNA universal primer, using extracted strain gene group DNA as template, according to following reaction system and
Amplification condition is expanded.Primer sequence reaction system and amplification condition are respectively as shown in table 3, table 4.PCR product with 1% fine jade
Lipolysaccharide electrophoresis detection.
The primer sequence of 3 16S rDNAPCR of table amplification
The reaction system and response procedures of the PCR amplification of 4 16S rDNA of table
The recovery purifying of 5.1 PCR products
By the PCR product whole point sample (80 holes μ L/, totally two holes) containing target stripe, 1.5% Ago-Gel electricity
Swimming, electrophoretic band are recycled with Tiangeng Ago-Gel DNA QIAquick Gel Extraction Kit, the specific steps are as follows:
(1) column equilibration step: to adsorption column CA2In (being put into collecting pipe) be added 500 μ L equilibrium liquid BL, 12000r/
Min is centrifuged 1min, outwells the waste liquid in collecting pipe, adsorption column is placed back in collecting pipe.
(2) single target DNA band is cut from Ago-Gel (excision redundance as far as possible) be put into it is clean
In centrifuge tube, weight is weighed.Formula: (weight of centrifuge tube before weight-dress glue after dress glue) × 1000=" 1000 times of volumes " μ
L。
(3) " 1000 times of volumes " sol solutions PN is added into blob of viscose, 10min is placed in 50 DEG C of water-baths, therebetween constantly leniently
Centrifuge tube is spun upside down, it is cooling to ensure that blob of viscose sufficiently dissolves, sol solution temperature is down to room temperature upper prop again, stops 2 after upper prop
~5min.
(4) an adsorption column CA is added in previous step acquired solution2In, adsorption column is put into collecting pipe, 13000r/
Min is centrifuged 1min, outwells the waste liquid in collecting pipe, adsorption column is reentered into collecting pipe.
(5) 600 μ L rinsing liquid PW (please first check whether before use and dehydrated alcohol has been added) are added into adsorption column, stop
2min, 13000r/min are centrifuged 1min, outwell waste liquid, adsorption column is reentered into collecting pipe.
(6) 500 μ L rinsing liquid PW, 13000r/min are added into adsorption column centrifugation 30 seconds, outwell waste liquid.Centrifugation is adsorbed
Column CA2It is put into collecting pipe, 13000r/min is centrifuged 2min, as far as possible removing rinsing liquid.Adsorption column is placed in 50 DEG C of baking ovens and is dried
It several minutes, thoroughly dries, to prevent remaining rinsing liquid from influencing the experiment (influencing recovery efficiency and DNA mass) of next step.
(7) adsorption column is put into a clean centrifuge tube and (cuts cap), 30 μ are vacantly added dropwise to adsorbed film middle position
L elution buffer EB, is placed at room temperature for 2min, and 13000r/min is centrifuged 1min and collects DNA solution.
(8) in order to improve the yield of DNA, the solution that can obtain centrifugation is again in add-back centrifugal adsorbing column, 13000r/
Min is centrifuged 1min and collects DNA solution, is repeated 3 times elution.
(9) DNA solution is placed in the centrifuge tube of lid (when last time elutes), -20 DEG C is stored in, to prevent DNA
Degradation.A small amount of DNA solution after the recovery is taken to verify its purity and content with 1% agarose electrophoresis.
The connection of 5.2 target fragments and cloning vector
The DNA segment that previous step PCR recovery purifying obtains is uniformly mixed with pMD18-T carrier, 4 DEG C of reactions are overnight.Even
Junctor system is as follows:
Carrier after connection is transferred in E.coli DH5 α competent cell, after shaking training, coated plate, picking white colony is connect
Kind is 37 DEG C in the LB culture medium containing Amp, 180r/min shaking table culture 10~12 hours.
The detection of 5.3 positive clone molecules
PCR amplification, primer sequence (referring to pMD18-T Vector specification), reactant are carried out by template of gained bacterium solution
As shown in table 5 and table 6, product is detected with 1% agarose electrophoresis for system and amplification condition difference.
5 recon PCR of table detects used primer sequence
The analysis of 5.4 16SrDNA sequences
Obtained positive colony is sent to raw work (Sangon Biotech) the bioengineering limited liability company in Shanghai to carry out
Sequencing analyzes sequencing result with 7.09 software of BioEdit, amputates primer sequence, the sequence results of acquisition are submitted to
GenBank database obtains accession number, is carried out by BLASTn program (http://www.ncbi.nlm.nih.gov/) online
Analysis, the sequence of type strain of the downloading similitude greater than 90%, and Multiple sequence alignments are carried out with Clustal X software, so
Afterwards using the Neighbor-Joining phylogenetic tree construction in software MEGA 5.03, the race relation of bacterial strain is determined.
6, bacterial strain 16S rDNA Sequence Identification result
6.1,16S rDNA sequence PCR amplification
16S rDNA sequence pcr amplification product is with 1% agarose gel electrophoresis inspection, as a result as shown in Figure 2.Bacterial strain II5
16S rDNA genetic fragment length be about 1500bp.
6.2, PCR product recycling
Electrophoresis carried out with 1.5% Ago-Gel to the 16S rDNA sequence pcr amplification product in 6.1, electrophoretic band with
The recycling of DNA plastic recovery kit.PCR product recycles electrophorogram as shown in figure 3, according to band brightness it is found that this experiment has become
Function is recovered to enough purified pcr products, can be used for follow-up test progress.
6.3, positive clone molecule is screened
16S rDNA pcr amplification product after purification is connect with carrier T, conversion to big Exiguobacterium sp competent cell,
PCR amplification is carried out by template of gained thallus, as a result as shown in figure 4, having obtained the positive clone molecule with recombinant plasmid.
6.4,16S rDNA nucleotide sequencing
The 16S rDNA nucleotide sequencing result of each bacterial strain is shown in sequence table 1, the phylogenetic tree of each bacterial strain such as Fig. 5 institute
Show.Combining form and Physiology and biochemistry qualification result, determine the kind of each bacterial strain, the results are shown in Table 7.
The kind of 7 bacterial strain of table
By Morphological Identification, Physiology and biochemistry identification and 16S rDNA Molecular Identification, determine that the bacterial strain of above-mentioned screening is micro-
Microbacterium (Exiguobacterium sp.) bacterium II5.
Specific embodiment 2: the application of one plant of lignocellulosic substance efficient degrading bacteria II5 of present embodiment, it
For lignocellulose degradation substance.
Following functions detection is carried out to bacterial strain of the invention:
By Exiguobacterium sp (Exiguobacterium sp.) II5 of specific embodiment, Bag Material agaric waste material and jade are carried out
Rice stalk weight-loss ratio and lignin, cellulose and hemicellulose degradation measurement, to verify its distinctive function.It is specific as follows:
1, Bag Material agaric waste material and corn stover weight-loss ratio measure
1.1 corn stalk powder
Corn stover is derived from the examination of this laboratory of Harbin, Heilongjiang Province Heilongjiang University, school district, Hulan in October, 2012
Field is tested, dries, crushed 40 meshes, it is spare.
1.2 Bag Material agaric waste materials
Bag Material agaric waste material is provided by Heilongjiang Academy of Agricultural Sciences Mudanjiang branch.
1.3 control microbial inoculums
" the organic matter decomposing inoculant that Zhongnong Lvkang (Beijing) Biotechnology Co., Ltd. produced on October 27th, 2011
(straw type) ".
1.4 culture medium
Liquid fermentation medium: glucose 5g, peptone 2g, NH4NO31.0g, CaCl20.2g, K2HPO40.5g,
FeCl30.02, MgSO4·7H2O 0.5g, NaCl 1.0g, distilled water 1000mL, pH 7.0.
Shake flask fermentation basal medium: peptone 2g, NH4NO31.0g, CaCl20.2g, K2HPO40.5g, FeCl3
0.02, MgSO4·7H2O 0.5g, NaCl 1.0g, distilled water 1000mL, pH 7.0.
1.5 test method
1.5.1 Bag Material agaric waste material weight-loss ratio measures
Specific embodiment one is screened into obtained Exiguobacterium sp (Exiguobacterium sp.) II5 and is inoculated into 5mL liquid
In body fermentation medium, 37 DEG C of 180r/min shaken cultivation 12h, centrifugation abandons supernatant and obtains thallus.Take 500 μ L shake flask fermentation bases
Basal culture medium makes thallus suspend, and bacteria suspension is accessed in the shake flask fermentation basal medium containing 5% Bag Material agaric waste material, wherein
Bag Material agaric waste material is sterilized using tyndallization, after 121 DEG C of moist heat sterilizations 30min, 37 DEG C of 180r/min shaken cultivation 30d,
Precipitating is washed with deionized in centrifugation, and after washing repeatedly three times, it is weightless to calculate Bag Material agaric waste material with Subtraction method for drying weighing
Rate analyzes the data obtained by SPSS19.0 software, Multiple range test is carried out using Duncan method, as a result with marker word mother law mark
The significance difference of bright each bacterial strain is anisotropic.Five groups of blank control groups and five groups of positive controls are set, i.e. blank control group does not connect strain,
The control microbial inoculum of positive controls access 5%, other operations are identical as aforesaid operations.
Weight-loss ratio calculation formula is as follows:
1.5.2 corn stover weight-loss ratio measures
Specific embodiment one is screened into obtained Exiguobacterium sp (Exiguobacterium sp.) II5 and is inoculated into 5mL liquid
In body fermentation medium, 37 DEG C of 180r/min shaken cultivation 12h, centrifugation abandons supernatant and obtains thallus.Take 500 μ L shake flask fermentation bases
Basal culture medium makes thallus suspend, and bacteria suspension is accessed in the shake flask fermentation basal medium containing 5% corn stalk powder, wherein beautiful
Rice straw powder is sterilized using tyndallization, after 121 DEG C of moist heat sterilizations 30min, 37 DEG C of 180r/min shaken cultivation 30d, centrifugation,
Precipitating is washed with deionized, after washing repeatedly three times, drying weighing calculates corn stover weight-loss ratio with Subtraction method, by gained
Data are analyzed by SPSS19.0 software, are carried out Multiple range test using Duncan method, are as a result indicated each bacterial strain with marker word mother law
Significance difference it is anisotropic.Five groups of blank control groups and five groups of positive controls are set, i.e. blank control group does not connect strain, positive control
Group 5% complex micro organism fungicide of access, other operations are identical as aforesaid operations.
Weight-loss ratio calculation formula is as follows:
1.6 results and analysis
1.6.1 Bag Material agaric waste material weight-loss ratio measures
Bacterial strain II5 degrades after Bag Material agaric waste material, and weight-loss ratio measurement result is as shown in table 8 and Fig. 6.
The Bag Material agaric waste material weight-loss ratio of 8 bacterial strain II5 of table
Note: the weight-loss ratio of Bag Material agaric waste material and corn stover after 30d liquid fermentation.Blank control group does not access bacterium
Kind, positive controls access the complex micro organism fungicide of 5% Zhongnong Lvkang (Beijing) Biotechnology Co., Ltd. production.Using
Duncan method carries out Multiple range test.Significance p=0.05 indicates with lowercase, n=3.
By table 8 and Fig. 6 it is found that after culture 30d, after Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation, bag
The weight-loss ratio for expecting agaric waste material is 36.08 ± 0.10%；Blank control group Bag Material agaric waste material weight-loss ratio be 21.60% ±
0.82%；Positive controls Bag Material agaric waste material weight-loss ratio is 38.53% ± 0.87%.Through Exiguobacterium sp
The weight-loss ratio of Bag Material agaric waste material is greater than blank control group after (Exiguobacterium sp.) II5 degradation, is less than positive control
Group.It is analyzed according to level of signifiance p=0.05, through Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process Bag Material agaric
The weight-loss ratio of waste material significant difference compared with the Bag Material agaric waste material weight-loss ratio of blank control group, the Bag Material wood with positive controls
Ear waste material weight-loss ratio compares significant difference.Exiguobacterium sp (Exiguobacterium sp.) II5 to Bag Material agaric waste material have compared with
Strong degradation capability.The weightlessness of Bag Material agaric waste material after Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process
Rate is 36% or more.
1.6.2 corn stover weight-loss ratio measures
After bacterial strain II5 degrading maize straws, weight-loss ratio measurement result is as shown in table 8 and Fig. 7.
It is beautiful after Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation by table 8 and Fig. 7 it is found that after culture 30d
The weight-loss ratio of rice stalk is 30.03 ± 0.31%；Blank control group corn stover weight-loss ratio is 25.80% ± 0.63%；It is positive
Control group corn stover weight-loss ratio is 44.81% ± 1.02%.It degrades through Exiguobacterium sp (Exiguobacterium sp.) II5
The weight-loss ratio of corn stover is greater than blank control group afterwards, is less than positive controls.It is analyzed according to level of signifiance p=0.05, through micro-
Dialister bacterium (Exiguobacterium sp.) the corn stover weight-loss ratio of II5 fermentation process and the corn stover of blank control group
Weight-loss ratio compares significant difference, the significant difference compared with the corn stover weight-loss ratio of positive controls.Exiguobacterium sp
(Exiguobacterium sp.) II5 has stronger degradation capability to corn stover.Through Exiguobacterium sp
The weight-loss ratio of corn stover after (Exiguobacterium sp.) II5 fermentation process is 30% or more.
1.7 conclusion
Exiguobacterium sp (Exiguobacterium sp.) II5 filtered out through specific embodiment one is useless to Bag Material agaric
Material and corn stover have apparent degradation effect.The Bag Material wood after Exiguobacterium sp (Exiguobacterium sp.) II5 degradation
Ear waste material and the weight-loss ratio of corn stover are all larger than the Bag Material agaric waste material of blank control group and the weight-loss ratio of corn stover.Through micro-
The weight-loss ratio of Bag Material agaric waste material after dialister bacterium (Exiguobacterium sp.) II5 fermentation process is 36% or more；Through micro-
The weight-loss ratio of corn stover after dialister bacterium (Exiguobacterium sp.) II5 fermentation process is 30% or more.
Exiguobacterium sp (Exiguobacterium sp.) II5 is raw to the degradation effect and bacterial strain of lignocellulosic substance
Long situation and sample composition have much relations, Bag Material agaric waste material and corn stover to wash fiber using Fan Shi (Van Soest)
After assay, each component content in corn stover and Bag Material agaric waste material is shown in Table 9, Bag Material agaric waste material and corn stover
In lignin, the content of cellulose and hemicellulose it is significantly different.Same bacterial strain is to Bag Material agaric waste material and corn stover
With different degradation effects, the reason is that since Bag Material agaric waste material and lignin in corn stover are different with the content of cellulose
The growth and breeding for influencing bacterial strain cause strain growth situation different, and the secretion capacity of enzyme has differences, and then leads to bacterial strain pair
The Utilization ability of catabolite is different, influences its degradation capability.
9 Bag Material agaric waste material of table and corn stover each component content
2, lignin, cellulose and the measurement of hemicellulose degradation situation
2.1 culture mediums are prepared:
Liquid fermentation medium: glucose 5g, peptone 2g, NH4NO31.0g, CaCl20.2g, K2HPO40.5g,
FeCl30.02, MgSO4·7H2O 0.5g, NaCl 1.0g, distilled water 1000mL, pH 7.0.
Shake flask fermentation basal medium: peptone 2g, NH4NO31.0g, CaCl20.2g, K2HPO40.5g, FeCl3
0.02, MgSO4·7H2O 0.5g, NaCl 1.0g, distilled water 1000mL, pH 7.0.
Corn stover is derived from the examination of this laboratory of Harbin, Heilongjiang Province Heilongjiang University, school district, Hulan in October, 2012
Field is tested, dries, crushed 40 meshes, it is spare.
2.2 liquid fermentation
Exiguobacterium sp (Exiguobacterium sp.) II5 of specific embodiment one is inoculated into liquid fermentation and culture
The bacteria suspension of OD600=0.5 is made in base, bacterium solution access is then contained by 7.5% corn stover with 5% (mL/mL) inoculum concentration
In the shake flask fermentation basal medium of powder, corn stalk powder is sterilized using tyndallization, 121 DEG C of moist heat sterilization 30min, if three
Secondary repetition, 37 DEG C of 180r/min shaken cultivation 30d, is dried using lyophilization.One group of blank control group is set
With one group of positive controls, i.e. blank control group does not connect strain, and positive controls access 5% (g/mL) microbial inoculum, other operations are equal
It is identical as aforesaid operations.
2.3 lignin, cellulose and the measurement of hemicellulose degradation situation
Lignocellulosic each component content is measured using Fan Shi (Van Soest) washing fibre analysis method.Detailed mistake
Journey is as follows:
2.3.1, neutral detergent fiber (NDF) measures
By FiberCap specimen cup in 105 DEG C of oven drying 30min, taking-up is transferred in drier, after being cooled to 5min,
It weighs (as W1).Sample after accurately weighing 2.000g (as W2) liquid fermentation is placed in FiberCap specimen cup, by sample
Product cup is put into extraction beaker, and 400mL neutral detergent and 1mL decahydronaphthalenes and 2g anhydrous sodium sulfite is added.It will be on beaker sleeve
Condensation dress is placed in heating plate, boils 10min, continues slightly boiled 60min.After boiling, washed repeatedly with fresh hot water
Three times.Specimen cup is put into baking oven after 130 DEG C of drying 2h, is cooled to room temperature in drier, is weighed (as W3).
2.3.2, acid detergent fiber (ADF) measures
FiberCap specimen cup containing neutral detergent fiber after above-mentioned drying weighing is placed in extraction beaker, is added
100mL acid detergent and 1mL decahydronaphthalenes and 2g anhydrous sodium sulfite.Condensation dress on beaker sleeve is placed in heating plate,
10min is boiled, slightly boiled 60min is continued.After boiling, three times with fresh hot water repeated washing.Specimen cup is put into baking oven
In after 130 DEG C of drying 2h, be cooled to room temperature, weigh (as W4) in drier.
2.3.3, acidic cleaning lignin (ADL) measures
FiberCap specimen cup containing neutral detergent fiber after above-mentioned drying weighing is placed in extraction beaker, is added
72% sulfuric acid filters after 20 DEG C of digestion 3h, three times with fresh hot water repeated washing.Specimen cup is put into 130 DEG C of bakings in baking oven
It after dry 2h, is cooled to room temperature, weighs (as W5) in drier.
2.3.4, acid insoluble ash (AIA) measures
By specimen cup be placed in predrying and weigh (W6) ashing crucible (45 × 60mm) in, 600 DEG C of ashes in Muffle furnace
Change 4h.When crucible slowly cools to about 200 DEG C, taking-up is put in drier；(W6) is weighed after being cooled to room temperature.
The data obtained is analyzed by SPSS19.0 software, Multiple range test is carried out using Duncan method, as a result with marker word
Mother law indicates that the significance difference of each bacterial strain is anisotropic.Each calculation formula is as follows:
Neutral detergent fiber (NDF) content:
NDF (%)=(W3-W1)/W2 × 100%；
Acid detergent fiber (ADF) content:
ADF (%)=(W4-W3)/W2 × 100%；
Acidic cleaning lignin (ADL) content:
ADL (%)=W5/W2 × 100%；
Hemicellulose (Hemicellulose) content:
Hemicellulose (%)=NDF (%)-ADF (%)；
Cellulose (Cellulose) content:
Cellulose (%)=ADF (%)-W5/W2 × 100%；
Lignin (Lignin) content:
Lignin (%)=W5/W2 × 100%-W6/W2 × 100%；
Lignin proportionality coefficient:
2.4 results and analysis
2.4.1 lignin, cellulose and hemicellulose level measurement
Corn stover is after strain fermentation handles 30d, cellulose, hemicellulose and content of lignin measurement result such as table 10
With shown in Fig. 8.
Each component average content in corn stover after 10 strains for degrading of table
Note: blank control group does not access strain, and positive controls access the limited public affairs of the green health of 5% middle peasant (Beijing) biotechnology
Take charge of the complex micro organism fungicide of production.Multiple range test is carried out using Duncan method.Significance p=0.01 and p=0.05 points
It is not indicated with upper and lower case letter, n=3.
By table 10 and Fig. 8 it is found that corn stover is through Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process 30d
Afterwards, content of lignin is 7.58 ± 1.41%, Spruce lignin far smaller than in blank control group and positive controls
Content；With level of signifiance p=0.05 analysis, the corn stover of Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process
Middle content of lignin and content of lignin comparing difference in blank control group corn stover are significant, with positive controls corn stover
Middle content of lignin comparing difference is significant；With level of signifiance p=0.01 analysis, Exiguobacterium sp (Exiguobacterium sp.)
Content of lignin and content of lignin comparing difference in blank control group corn stover are aobvious in the corn stover of II5 fermentation process
It writes, it is significant with content of lignin comparing difference in positive control corn stover group；Illustrate Exiguobacterium sp (Exiguobacterium
Sp.) II5 can be with high-efficiency lignin degrading.
Corn stover is after liquid fermentation 30d, with level of signifiance p=0.05 analysis, Exiguobacterium sp
In the corn stover of (Exiguobacterium sp.) II5 fermentation process in content of cellulose and blank control group corn stover
Content of cellulose comparing difference is not significant, not significant with corn stalk fiber cellulose content comparing difference in positive controls；With aobvious
Write horizontal p=0.01 analysis, cellulose in the corn stover of Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process
The content of cellulose comparing difference of content and corn stover in blank control group is not significant, with corn stover in positive controls
Content of cellulose comparing difference is not significant；Illustrate that Exiguobacterium sp (Exiguobacterium sp.) II5 is unable to degraded cellulose.
Corn stover is after liquid fermentation 30d, with level of signifiance p=0.05 analysis, Exiguobacterium sp
Hemicellulose level and blank control group corn stover in the corn stover of (Exiguobacterium sp.) II5 fermentation process
Middle hemicellulose level comparing difference is not significant, significant with hemicellulose level comparing difference in positive controls corn stover；
It is analyzed with level of signifiance p=0.01, half in Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process corn stover
Content of cellulose and hemicellulose level comparing difference in blank control group corn stover be not significant, with positive controls corn stalk
Hemicellulose level comparing difference is not significant in stalk；Illustrate that Exiguobacterium sp (Exiguobacterium sp.) II5 can not degrade
Hemicellulose.
Exiguobacterium sp (Exiguobacterium sp.) II5 has significant lignin degradation energy, can be with efficient degradation wood
Quality.The degradation capability of lignin is better than as single bacterial strain Exiguobacterium sp (Exiguobacterium sp.) II5 compound micro-
Bacteria agent, content of lignin is through Exiguobacterium sp in the corn stover through complex micro organism fungicide fermentation process
1.6 times of content of lignin in the corn stover of (Exiguobacterium sp.) II5 fermentation process.
2.5 conclusion
Exiguobacterium sp (Exiguobacterium sp.) II5 filtered out through specific embodiment one has significant wood
Quality degradation capability, can be with high-efficiency lignin degrading.Lignin contains in corn stover through complex micro organism fungicide fermentation process
Amount is 1.6 times of content of lignin in the corn stover through Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process,
Complex microorganism is better than to the degradation capability of lignin as single bacterial strain Exiguobacterium sp (Exiguobacterium sp.) II5
Microbial inoculum.
3, full nitrogen, full phosphorus, full potassium, rapid available phosphorus and available potassium measurement
3.1, material and reagent
3.1.1, culture medium
Liquid fermentation medium: glucose 5g, peptone 2g, NH4NO31.0g, CaCl20.2g, K2HPO40.5g,
FeCl30.02, MgSO4·7H2O 0.5g, NaCl 1.0g, distilled water 1000mL, pH 7.0.
Shake flask fermentation basal medium: peptone 2g, NH4NO31.0g, CaCl20.2g, K2HPO40.5g, FeCl3
0.02, MgSO4·7H2O 0.5g, NaCl 1.0g, distilled water 1000mL, pH 7.0.
3.1.2, corn stalk powder
Corn stover is derived from the examination of this laboratory of Harbin, Heilongjiang Province Heilongjiang University, school district, Hulan in October, 2012
Field is tested, dries, crushed 40 meshes, it is spare
3.2, test method
3.2.1, liquid fermentation
Exiguobacterium sp (Exiguobacterium sp.) II5 that specific embodiment one filters out is inoculated into liquid hair
OD is made in ferment culture medium600Then bacterium solution access is contained 7.5% corn with 5% (mL/mL) inoculum concentration by=0.5 bacteria suspension
In the shake flask fermentation basal medium of straw powder, corn stalk powder is sterilized using tyndallization, 121 DEG C of moist heat sterilization 30min,
Each bacterial strain is set to be repeated three times, and 37 DEG C of 180r/min shaken cultivation 30d are dried using lyophilization.Setting one
Group blank control group and one group of positive controls, i.e. blank control group do not connect strain, and positive controls access 5% (g/mL) bacterium
Agent, other operations are identical as aforesaid operations.
3.2.2, sample solution preparation
Sample solution is carried out referring to People's Republic of China's agricultural industry criteria NY525-2012, but is improved to some extent.
The sample 0.5g (being accurate to 0.001g) after being freeze-dried in 3.2.1 is accurately weighed, kjeldahl flask bottom is placed in, is used
A small amount of water flushing attaches the sample in bottle wall, adds 5mL sulfuric acid and 1.5mL hydrogen peroxide, carefully shakes up, bottleneck is put small with curved neck
Funnel is stood overnight, and is to slowly warm up to sulfuric acid on adjustable electric furnace and is smoldered, removes, and few cold plus 15 drop hydrogen peroxide gently shake
Kjeldahl flask heats 10min, removes, and 5 drops of being in after slightly cold~10 drop hydrogen peroxide and disappearing by several times boil, until solution is in colourless
Or after faint yellow clear liquid, continues to heat 10min, eliminate remaining hydrogen peroxide.It removes slightly cold, carefully adds water to 30mL, heat
To boiling.Cooling is removed, rinses the curved small funnel of neck with a small amount of water, washing lotion is put into former kjeldahl flask, and the boil liquid that will disappear moves into 100mL
In volumetric flask, add water constant volume, is filled into without phosphorus filter paper in dry blue lid reagent bottle, it is spare.Three groups of blank control groups are set,
In addition to sample is not added, other operations are identical as aforesaid operations.
3.2.3, full nitrogen determination
Full nitrogen determination method referring to People's Republic of China's agricultural industry criteria NY525-2012 and NY/T297-1995 into
Row, but improve to some extent.
Disappearing for preparing in absorption 3.2.2 boils clear liquid 10mL in 50mL volumetric flask, and 2mL boric acid is added and 200 μ L mixing refers to
Show agent mixed liquor, water is added to be settled to 50mL.It is distilled using kjeldahl apparatus, titrates distillate with sulfuric acid standard solution, by
It is terminal, record consumption sulfuric acid titer volume (mL) that blue, which fades to aubergine,.The consumed sulfuric acid titer volume of blank determination
It must not exceed 0.1mL, otherwise redeterminate.Nitrogen (N) content is indicated entirely with g/kg, according to the following formula:
In formula:
V --- the volume of test solution titration consumption sulfuric acid standard solution, mL；
V0--- blank titration consumes the volume of sulfuric acid standard solution, mL；
C --- the concentration of sulfuric acid standard solution, mol/L；
0.014 --- with 1.00mL sulfuric acid (1/2H2SO4) the comparable nitrogen in grams of standard solution quality；
D --- point take multiple, constant volume/point take volume, 100/10；
M --- weigh sample mass, g；
1000 --- it is converted into the content of every kilogram of sample.
3.2.4, phosphorus measures entirely
Full phosphorus determination method referring to People's Republic of China's agricultural industry criteria NY525-2012 and NY/T298-1995 into
Row, but improve to some extent.
Draw phosphorus standard solution 0,1.00,2.00,3.00,4.00,5.00,6.00mL be respectively placed in 7 50mL volumetric flasks
In, the blank solution isometric with sample solution is drawn is added, adds water to 30mL, adds 400 μ L 2,6- dinitrophenol dinitrophenolate indicator is molten
Liquid, with sodium hydroxide solution and sulfuric acid solution adjust solution be just in it is yellowish, add 10.0mL vanadium ammonium molybdate reagent, shake up, use water
It is settled to 50mL.This solution is the standard liquid series of 1mL phosphorous (P) 0,1.00,2.00,3.00,4.00,5.00,6.00 μ g.
After placing 20min under 15 DEG C of conditions above of room temperature, 2cm optical path cuvette is used, at spectrophotometer wavelength 440nm with blank
Solution conditioning instrumentation zero point carries out colorimetric, reads absorbance, draws standard curve according to phosphorus concentration and absorbance, finds out straight line
Regression equation.Disappearing for preparing in absorption 3.2.2 boils clear liquid 10mL in 50mL volumetric flask, 30mL is added water to, with standard solution system
Column read absorbance with condition colour developing, colorimetric.Content of tatal phosphorus indicates with g/kg, according to the following formula:
In formula:
C --- developing solution phosphorus concentration, μ g/mL are acquired by regression equation；
V --- color volume, 50mL；
D --- point take multiple, constant volume/point take volume, 100/10；
M --- weigh sample mass, g；
10-3--- μ g/g is converted into the factor of g/kg.
3.2.5, potassium measures entirely
Full potassium measuring method referring to People's Republic of China's agricultural industry criteria NY525-2012 and NY/T299-1995 into
Row, but improve to some extent.
Draw potassium standard solution 0,2.50,5.00,7.50,10.00mL be respectively placed in 5 50mL volumetric flasks, be added with
Draw the isometric placebo solution of sample solution, with water constant volume, this solution be 1mL containing potassium (K) 0,5.00,10.00,
15.00, the standard liquid series of 20.00 μ g.On flame photometer, with blank solution conditioning instrumentation zero point, with standard solution
The standard solution of maximum concentration adjusts full value and indexes out to 80 in series.Again successively by low concentration to high measurement of concetration other standards
Solution, register instrument indicating value.Calibration curve is drawn according to potassium concn and instrument indicating value or finds out linear regression equation.It draws
3.2.2 disappearing for preparing in boils clear liquid 5.00mL in 50mL volumetric flask, with water constant volume.With standard liquid series with condition in flame
It is fixed on the upside of photometer, register instrument indicating value.It needs to be rectified an instrument with potassium standard solution after 5 samples of every measurement.Full potassium content is with g/
Kg expression, according to the following formula:
In formula:
C --- measurement liquid concentration, μ g/mL are acquired by regression equation；
V --- measurement volume, this operation are 50mL；
D --- point take multiple, constant volume/point take volume, 100/5；
M --- weigh sample mass, g；
10-3--- the factor of g/kg is scaled by μ g/g.
3.2.6, rapid available phosphorus measurement
Full potassium measuring method is carried out referring to People's Republic of China's agricultural industry criteria NY/T300-1995, but is changed
Into.
It accurately weighs the sample 1.00g after being freeze-dried in 3.2.1 to be placed in 50mL triangular flask, is added 25 DEG C of 20mL
Citric acid solution is jumped a queue, and vibrates 30min at 25 DEG C, is filtered with without phosphorus filter paper into dry blue lid reagent bottle, spare.If
Three groups of blank control groups are set, in addition to sample is not added, other operations are identical as aforesaid operations.Measuring method is identical as 3.2.4.It is quick-acting
Phosphorus content indicates with mg/kg, according to the following formula:
In formula:
C --- developing solution phosphorus concentration, μ g/mL are acquired by regression equation；
V --- color volume, 50mL；
D --- point take multiple, sample extracting liquid volume/point take volume, 20/5；
M --- weigh sample mass, g.
3.2.7, available potassium measurement
It accurately weighs the sample 1.00g after being freeze-dried in 3.2.1 to be placed in 50mL triangular flask, it is molten that 10mL nitric acid is added
Liquid plugs small funnel, and the slightly boiled 10min on electric furnace is filtered while hot in 50mL volumetric flask, is washed 5 times with hot water, fixed after cooling
Hold.Three groups of blank control groups are set, and in addition to sample is not added, other operations are identical as aforesaid operations.Measuring method and phase in 3.2.5
Together.Quick-acting potassium content indicates with mg/kg, according to the following formula:
In formula:
C --- measurement liquid potassium concn, μ g/mL are acquired by regression equation；
V --- measurement volume, 50mL；
M --- weigh sample mass, g.
3.3, result and analysis
3.3.1, nitrogen, full phosphorus, full potassium, rapid available phosphorus and quick-acting potassium content measurement entirely
Corn stover carries out full nitrogen, full phosphorus, full potassium, rapid available phosphorus and available potassium and surveys after strain liquid fermentation process 30d
It is fixed, as a result as shown in table 11 and Fig. 9~Figure 11.Corn stover is after liquid fermentation, according to the horizontal p=0.05 of the significance of difference
It is analyzed with p=0.01, it is the full nitrogen of Exiguobacterium sp (Exiguobacterium sp.) II5 fermentation process group, full phosphorus, full potassium, quick-acting
Phosphorus and quick-acting potassium content equal difference compared with blank control group is not significant.It therefore, will not when bacterial strain degrades to corn stover
Essential element content therein is influenced, sample still saves original fertilizer efficiency.
Essential element content in corn stover after 11 fermentation process of table
Note: blank control group does not access strain.Multiple range test is carried out using Duncan method.Significance p=0.01 and p
=0.05 is indicated respectively with upper and lower case letter, n=3.
3.4 conclusion
After Exiguobacterium sp (Exiguobacterium sp.) II5 handles 30d to corn stover liquid fermentation, in sample
Full nitrogen, full phosphorus, full potassium, rapid available phosphorus and quick-acting potassium content have no significant change.Exiguobacterium sp (Exiguobacterium sp.)
II5 will not cause the essential element content in sample when degrading sample, not will lead to full nitrogen in sample, full phosphorus, full potassium,
Rapid available phosphorus and quick-acting potassium content variation, sample still save original fertilizer efficiency.
Claims (2)
1. one plant of lignocellulosic substance efficient degrading bacteria II5, it is characterised in that it is Exiguobacterium sp
(Exiguobacteriumsp.) II5 is deposited in China Committee for Culture Collection of Microorganisms's common micro-organisms center, preservation
Address is Yard 1, BeiChen xi Road, Chaoyang District, Beijing City 3, and the deposit date is on December 12nd, 2014, deposit number CGMCC
No.10167。
2. the application of one plant of lignocellulosic substance efficient degrading bacteria II5 as described in claim 1, it is characterised in that it is used
The lignocellulosic substance in degradation Bag Material agaric waste material and corn stover.
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| Title |
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| Biodegradation of Diazo Reactive Dye Navy blue HE2R （Reactive blue 172）by an Isolated Exiguobacterium sp.RD3;R.S.Dhanve et al.;《Biotechnology and Bioprocess Engineering》;20081231;第13卷;第53-60页 * |
| Production of Bioethanol from Fermented Sugars of Sugarcane Bagasse Produced by Lignocellulolytic Enzymes of Exiguobacterium sp. VSG-1;S. Vijayalaxmi et al.;《Appl Biochem Biotechnol》;20130706;第171卷;第246-260页 * |
| 低温淀粉酶菌株C2的分离鉴定及其产低温淀粉酶的酶学性质;冯旭明等;《微生物学通报》;20111220;第38卷(第12期);第1762-1767页 * |
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