CN108060102A - A kind of cibarium Wei Si Salmonellas and its application, screening calibration method - Google Patents

A kind of cibarium Wei Si Salmonellas and its application, screening calibration method Download PDF

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CN108060102A
CN108060102A CN201810093014.0A CN201810093014A CN108060102A CN 108060102 A CN108060102 A CN 108060102A CN 201810093014 A CN201810093014 A CN 201810093014A CN 108060102 A CN108060102 A CN 108060102A
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salmonellas
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lactic acid
acid bacteria
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关皓
闫艳红
张新全
帅杨
李小铃
李小梅
黄琳凯
聂刚
汪霞
黄婷
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Sichuan Agricultural University
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Abstract

The present invention discloses a kind of cibarium Wei Si Salmonellas and its application, screening calibration method, the cibarium Wei Si Salmonellas (Weissella cibaria) are preserved in China Committee for Culture Collection of Microorganisms's common micro-organisms center, and deposit number is CGMCC No.15075;The cibarium Wei Si Salmonella growth rates are fast, and production acid is efficient;The cibarium Wei Si Salmonellas promote the quality of grass silage feed, are with a wide range of applications as grass silage additive.

Description

A kind of cibarium Wei Si Salmonellas and its application, screening calibration method
Technical field
The present invention relates to microbial technology fields, and in particular to a kind of cibarium Wei Si Salmonellas and its application, screening calibrating side Method.
Background technology
Ensiling is the multiplication by lactic acid bacteria, and the fermentation substrate in raw material is changed into the acidic materials such as lactic acid, maintains acid Property anaerobic environment, a kind of storage method preserved for a long time in favor of silo crop.Ensilage color is yellowish green, smell is sour fragrant, soft Soft succulence, palatability are good, the extensive use in Animal husbandry production, especially in ruminant is raised, it has also become important is high-quality Roughage source.
Lactic acid bacteria is the microoganism additives for ensiling promoted in recent years, and main function is micro- in adjusting ensiling material Biotic component rapidly becomes dominant microflora, and the growth of Competitive assays harmful microorganism converts limited sugar, reduces ensiling pH value, So as to improve the quality of ensilage, different its fermentation characters of ensiling material is in the presence of breasts that are different, and being suitable for ensiling at present Sour bacterium single varieties, it is impossible to meet the market demand.
The content of the invention
In view of this, this application provides a kind of cibarium Wei Si Salmonellas, the cibarium Wei Si Salmonella growth rates are fast, production acid It is efficient;For cibarium Wei Si Salmonellas as grass silage additive, fermented type is homofermentation, can quickly reduce grass silage pH Value makes lactic acid bacteria become dominant microflora, accelerates fermenting-ripening, reduces the generation of ammoniacal nitrogen and add organic acid content, carry The high fermentation quality of ensilage, so as to improve grass silage diet dry matter content, the dry matter rate of recovery, crude protein contain Amount reduces fiber content, promotes grass silage quality of the fodder, is with a wide range of applications.
For solution more than technical problem, technical solution provided by the invention is a kind of cibarium Wei Si Salmonellas, the cibarium Wei This Salmonella (Weissella cibaria) is preserved in China Committee for Culture Collection of Microorganisms's common micro-organisms center, ground Location is Yard 1, BeiChen xi Road, Chaoyang District, Beijing City 3, Institute of Microorganism, Academia Sinica, deposit number CGMCC No.15075, preservation date are on December 18th, 2017;
The 16s rDNA of above-mentioned cibarium Wei Si Salmonellas are as shown in SEQ ID NO.1.
The present invention also provides the above-mentioned applications for stating cibarium Wei Si Salmonellas in grass silage additive is prepared.
Preferably, the cibarium Wei Si Salmonellas are in Pennisetum ensiling and Hemarthria herbage additive is prepared Using.
Preferably, the Pennisetum is that Pennisetum is that Gui Mu No.1 hybrid Chinese pennisetum, Gui Min draw napier grass.
Preferably, the Hemarthria herbage is Hemarthria compressa.
The present invention also provides the screening calibration methods of above-mentioned cibarium Wei Si Salmonellas, comprise the following steps:
1) Forage Grass is taken, is drawn after dilution and is applied to MRS solid medium cultures, chosen single bacterium colony and support and continue to cultivate Afterwards, continuous passage culture is no less than 2 times, the bacterium colony purified;
2) bacterium colony for the purifying for obtaining step 1) is cultivated on lactic acid bacteria solid medium under the conditions of constant-temperatureanaerobic anaerobic Afterwards, by Gram's staining and catalase haptoreaction, the identification of lactic acid bacteria is carried out, the lactic acid bacteria after identification is added in and is contained It in the liquid nutrient media of sterile glycerol, and stores, the lactic acid bacteria isolated and purified;
3) after the lactic acid bacteria isolated and purified for obtaining step 2) carries out actication of culture, MRS Liquid Cultures are inoculated into It is cultivated in base, obtains bacterium solution;Measure the bacterium solution pH and OD values, according to measurement result carry out screening pH=3.76, OD value= 1.641 bacterium solution obtains the bacterial strain after tentatively screening;
4) after the bacterial strain after the preliminary screening for obtaining step 3) carries out Anaerobic culturel, the DNA for carrying out single strain is carried It takes, carrying out PCR amplification as template using the DNA of extraction obtains amplified production, and the amplified production is the cibarium Wei Si Salmonellas.
Preferably, the step specifically includes:
1) Forage Grass is taken, sterile distilled water is added in, is diluted to 10-1, 10-3With 10-5The sample dilution of three dilution factors Liquid;Pipette samples dilution is applied to MRS solid medium cultures, continuous passage culture 2 times, the bacterium colony purified;
2) bacterium colony for the purifying for obtaining step 1) is on lactic acid bacteria solid medium under the conditions of 37 DEG C of constant-temperatureanaerobic anaerobics After culture for 24 hours, by Gram's staining and catalase haptoreaction, the identification of lactic acid bacteria is carried out, by the lactic acid after identification Bacterium is added in the liquid nutrient media containing sterile glycerol, and with -80 DEG C of storages, the lactic acid bacteria isolated and purified;
3) after the lactic acid bacteria isolated and purified for obtaining step 2) carries out actication of culture, it is inoculated with 3% inoculum concentration Into 10ml MRS fluid nutrient mediums, with 40~45 DEG C of temperature, humidity 85%~98% cultivates 12h, obtains bacterium solution;Described in measure Bacterium solution pH and OD values carry out the bacterium solution of screening pH=3.76, OD value=1.641 according to measurement result, after obtaining tentatively screening Bacterial strain;
4) bacterial strain after the preliminary screening for obtaining step 3) carries out the Anaerobic culturel 48h under the conditions of 37 DEG C of temperature Afterwards, the DNA extractions of single strain are carried out, carrying out PCR amplification as template using the DNA of extraction obtains amplified production, the amplified production As described cibarium Wei Si Salmonellas.
Preferably, the DNA using extraction carries out PCR amplification as template and obtains amplified production process and be specially:With upstream Primer:5 ,-AGAGTTTGATCCTGGCTCAG-3, anti-sense primer:5 ,-GGTTACCTTGTTACGACTT-3 are specific primer PCR amplification is carried out for template to the DNA of extraction and obtains amplified production, the pcr amplification reaction condition is:95 DEG C of pre-degeneration 5min Afterwards, 95 DEG C of denaturation 30s, 55 DEG C of annealing 30s, 72 DEG C of extension 90s are cycled 30 times, then 72 DEG C of extension 5min.
Preferably, the screening calibration method further includes:The cibarium Wei Si Salmonellas that step 4) is obtained pass through physiology Biochemical measurement, Salt tolerance, different temperatures experiment, acid resistance test and sugar fermentating test evaluation test are analyzed.
Preferably, the screening calibration method further includes:The cibarium Wei Si Salmonellas that step 4) is obtained carry out 16S RDNA sequence analyses.
Preferably, the Forage Grass is Pennisetum sample.
Preferably, the Pennisetum sample is Gui Mu No.1 hybrid Chinese pennisetum fresh grass, Gui Min draws napier grass fresh grass, osmanthus It herds No. 1 hybrid Chinese pennisetum ensiling sample or napier grass ensiling sample is drawn in osmanthus Fujian.
Compared with prior art, detailed description are as follows by the application:
The present invention provides a kind of cibarium Wei Si Salmonellas, and growth rate is fast, and production acid is efficient.
Cibarium Wei Si Salmonellas provided by the invention are applied to the grass silage used time, can the limited sugar of rapid conversion, significantly Ground reduces ensiling pH value, effectively improves the quality of ensilage, has larger potentiality and vast potential for future development.Further, In herbage, the water-soluble carbohydrate content of Pennisetum is relatively low, and moisture is higher, and buffer index is larger, Its stalk is hollow to have large quantity of air, so the fermentation of Chinese pennisetum ensiling is slow, ultimately results in ensiling failure.Hemarthria herbage is certainly The lactic acid bacterium number of body attachment is less, and China at present reports Hemarthria Forage Research less.Cibarium Wei provided by the invention For this Salmonella as grass silage additive, fermented type is heterofermentation, can quickly reduce grass silage pH value, make lactic acid bacteria into For dominant microflora, accelerate fermenting-ripening, reduce the generation of ammonia nitrogen content and increase organic acid content, improve ensilage Fermentation quality, so as to improve grass silage diet dry matter content, the dry matter rate of recovery, crude protein content promote grass silage Quality of the fodder;Fiber content is reduced, improves palatability, and then promotes grass silage quality of the fodder, is had extensive Application prospect.
The present invention provides Forage Grass in the screening calibration method of cibarium Wei Si Salmonellas through isolate and purify to obtain separate it is pure The lactic acid bacteria of change, the lactic acid bacteria culturers activation culture from purifying, obtains bacterium solution;According to bacterium solution pH=3.76, OD value=1.641 Screening criteria is screened, and is obtained the bacterial strain after tentatively screening, after the bacterial strain after preliminary screening carries out Anaerobic culturel, is carried out single plant The DNA extractions of bacterium carry out PCR amplification as template using the DNA of extraction and obtain amplified production, and method is simple and convenient, has extensive Application prospect.
Screening calibration method the present invention provides cibarium Wei Si Salmonellas is come true by the identification to obtained microorganism Surely the microorganism of institute's prescreening has been obtained as cibarium Wei Si Salmonellas provided by the invention, and repeatable implementation, widely should have Use prospect.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with Other attached drawings are obtained according to these attached drawings.
Fig. 1 provides the optical microscope of cibarium Wei Si Salmonellas for the present invention.
Specific embodiment
In order to which those skilled in the art is made to more fully understand technical scheme, with reference to specific embodiment pair The present invention is described in further detail.
A kind of cibarium Wei Si Salmonellas, the cibarium Wei Si Salmonellas (Weissella cibaria) are preserved in China Microbiological Culture presevation administration committee common micro-organisms center, address are Yard 1, BeiChen xi Road, Chaoyang District, Beijing City 3, Chinese science Institute of microbiology of institute, deposit number are CGMCC No.15075, and preservation date is on December 18th, 2017;
The 16s rDNA nucleotide of above-mentioned cibarium Wei Si Salmonellas (Weissella cibaria) is as shown in SEQ ID NO.1.
The screening calibration method of above-mentioned cibarium Wei Si Salmonellas, comprises the following steps:
1) Forage Grass is taken, sterile distilled water is added in, is diluted to 10-1, 10-3With 10-5The sample dilution of three dilution factors Liquid;Pipette samples dilution is applied to MRS solid medium cultures, continuous passage culture 2 times, the bacterium colony purified.
2) bacterium colony for the purifying for obtaining step 1) is on lactic acid bacteria solid medium under the conditions of 37 DEG C of constant-temperatureanaerobic anaerobics After culture for 24 hours, by Gram's staining and catalase haptoreaction, the identification of lactic acid bacteria is carried out, by the lactic acid after identification Bacterium is added in the liquid nutrient media containing sterile glycerol, and with -80 DEG C of storages, the lactic acid bacteria isolated and purified.
3) after the lactic acid bacteria isolated and purified for obtaining step 2) carries out actication of culture, it is inoculated with 3% inoculum concentration Into 10ml MRS fluid nutrient mediums, with 40~45 DEG C of temperature, humidity 85%~98% cultivates 12h, obtains bacterium solution;Described in measure Bacterium solution pH and OD values, measurement result are shown in Table 1, the bacterium solution of screening pH=3.76, OD value=1.641 are carried out according to measurement result, is obtained Bacterial strain to after preliminary screening.
4) bacterial strain after the preliminary screening for obtaining step 3) carries out the Anaerobic culturel 48h under the conditions of 37 DEG C of temperature Afterwards, the DNA extractions of single strain are carried out, with sense primer:27F (5 ,-AGAGTTTGATCCTGGCTCAG-3), anti-sense primer: 1492R (5 ,-GGTTACCTTGTTACGACTT-3) is that specific primer is that template progress PCR amplification is obtained to the DNA of extraction Amplified production, the amplified production are above-mentioned cibarium Wei Si Salmonellas;The pcr amplification reaction condition is:95 DEG C of pre-degenerations After 5min, 95 DEG C of denaturation 30s, 55 DEG C of annealing 30s, 72 DEG C of extension 90s are cycled 30 times, then 72 DEG C of extension 5min;
Wherein, the Forage Grass is Pennisetum sample;The Pennisetum sample hybridizes for Gui Mu No.1 Chinese pennisetum fresh grass, Gui Min draw napier grass fresh grass, Gui Mu No.1 hybrid Chinese pennisetum ensiling sample or osmanthus Fujian and draw napier grass ensiling sample.
Fig. 1 is the above-mentioned optical microscope for providing cibarium Wei Si Salmonellas.
1 bacterium solution pH of table and OD values
The microorganism of strain number F10 is the bacterial strain after this patent tentatively screening, by the bacterial strain after the preliminary screening through detesting Oxygen culture, DNA extractions, the cibarium Wei Si Salmonellas provided by the invention obtained using the DNA of extraction as template progress PCR amplification, Growth rate is fast, and production acid is efficient.
Embodiment 2
Physiological and biochemical test:The cibarium Wei Si Salmonella physiological and biochemical properties in embodiment 1 are analyzed, the results are shown in Table 2.
Different temperatures is tested:Cibarium Wei Si Salmonellas in embodiment 1 are inoculated into MRS Liquid Cultures with 3% inoculum concentration It in base, is cultivated under the temperature conditionss of table 2, observes its growth situation, the results are shown in Table 2.
Salt tolerance:By the cibarium Wei Si Salmonellas in embodiment 1 to contain NaCl concentration 3.0% (w/v) and 6.5% (w/ V) in MRS fluid nutrient mediums, after being cultivated 2 days at 30 DEG C, its salt tolerance is measured, the results are shown in Table 2.
Acid resistance test:It it is 30 DEG C in the MRS fluid nutrient mediums of table 2pH value conditions by the cibarium Wei Si Salmonellas in embodiment 1 After lower culture 7 days, its acid resistance is measured, the results are shown in Table 2.
Sugar fermentating test:Cibarium Wei Si Salmonella sugar fermenting characteristics in embodiment 1 are analyzed by sugar fermentating test, the result is shown in Table 3.
16S rDNA sequence analyses:Cibarium Wei Si Salmonellas in embodiment 1 are subjected to 16S rDNA sequence analyses, 16s RDNA is as shown in SEQ ID NO.1;With other cibariums Wei Si Salmonellas (Weissella cibaria) 16S rDNA analytical sequences Similitude reaches 100% and 99%.
2 physiological and biochemical test of table, different temperatures experiment, Salt tolerance and acid resistance test result
In table 2 ,+:Grow Positive;-:Do not grow Negative;W:Faint growth Weakly positive.
As shown in Table 2, cibarium Wei Si Salmonellas salt tolerance and acid resistance provided by the invention are good, to the adaptability of different temperatures Preferably.
3 sugar fermentating test result of table
In table 3 ,+:Grow Positive;-:Do not grow Negative;W:Faint growth Weakly positive.
As shown in Table 3, cibarium Wei Si Salmonellas provided by the invention are handed over wide using carbon source scope, can preferably utilize different green grass or young crops Different types of carbon source is fermented in storage raw material.
Embodiment 3
Using the cibarium Wei Si Salmonellas of the present invention as grass silage additive
The herbage of 1.5~2m of height is taken in Chongzhou City of Sichuan Agricultural University base, it is about 20mm to be cut into length, obtains fresh sample, Each processing respectively takes fresh sample 300g to put into polybag (25 × 35cm;Aodeju, China), according to by the present invention in embodiment 1 Cibarium Wei Si Salmonellas 1.0 × 108CFU/g fresh materials add 1ml in every bag of ensilage, and then vacuum-pumping and sealing, is placed in It ferments in room temperature, each 3 repetitions of processing group break a seal after ensiling 60d, obtain ensiling sample.
1st, subjective appreciation:
1) the sense organ ensiling standards of grading and ranking pair that ensiling sample is compiled and edit according to German animal husbandry association (DLG) for 1899 Smell, structure and the color and luster of ensilage carry out sensory evaluation scores respectively.
4 ensilage subjective appreciation standard (DLG) of table
2) results of sensory evaluation is shown in Table 5.
5 results of sensory evaluation of table
As shown in Table 5, cibarium Wei Si Salmonellas provided by the invention do not add as grass silage additive and any addition The control group of agent is compared, and in terms of smell, stink etc. is weak, and more preferably, structure of stem and leaf is kept more preferably armaticity, and color and luster is more preferable.
2nd, fermentation quality is analyzed:
1) 20g ensilings sample addition 180mL deionized waters is taken to be put into pony mixer and stir 1min, 8 layers of filter cloth is crossed, uses benzene Phenol-hypochlorous acid receives colorimetric method for determining filtrate pH value, and colorimetric method for determining filtrate ammoniacal nitrogen (NH is received with phenol-hypochlorous acid3-N)
20g ensilings sample is taken to mix concussion with 180ml sterile purified waters, with four layers of filtered through gauze, using high performance liquid chromatography Method measures organic acid content.
2) herbage be Pennisetum, Pennisetum fermentation quality analysis in table 6, table 7.
6 Pennisetum fermentation quality of table is analyzed
7 Pennisetum fermentation quality of table is analyzed
ND:It does not detect.
3) herbage is Hemarthria herbage, and Hemarthria herbage fermentation quality analysis result is shown in Table 8.
8 Hemarthria herbage fermentation quality of table is analyzed
From table 6~8, cibarium Wei Si Salmonellas provided by the invention are as grass silage additive with not adding any add The control group of agent is added to compare, can quickly reduce grass silage pH value, Silage Quality is more preferable, cibarium Wei Si Salmonellas provided by the invention As grass silage additive NH3- N/%TN does not add the control group of any additive substantially less than.Cibarium provided by the invention Wei Si Salmonellas can dramatically increase lactic acid content as grass silage additive, can promote lactic acid bacterium number, and significantly reduce yeast Bacterium and enterobacteria quantity are that lactic acid bacteria becomes dominant microflora, always the harmful bacteria in ensilage, improve the ensiling product of herbage Matter.Cibarium Wei Si Salmonellas provided by the invention are remarkably improved organic as Pennisetum additives for ensiling, ensiling 60d Acid content improves the fermentation rate of Pennisetum ensiling, so as to improve ensiling success rate, improves the green grass or young crops of Pennisetum Store quality.
3rd, Analysis of Nutritive Composition:
1) ensiling sample is taken to be placed in air dry oven, 105 DEG C of water-removing 0.5h then dry 72h or so until constant weight at 65 DEG C, Drying sample smashes it through 40 mesh sieves with small plant sample pulverizer.Using conventional oven drying method measure dry matter (Dry Matter, DM), using 8400 type full-automatic Kjeldahl determination device determination of distillation crude protein (Crude Protein, CP) of FOSS, using Fan Shi It washs fibre method and measures neutral detergent fiber (Neutral Detergent Fiber, NDF) and acid detergent fiber (Acid Detergent Fiber, ADF), using Anthrone Sulphuric acid Colorimetry soluble-carbohydrate (Water Soluble Carbohydrates,WSC);
2) herbage is Pennisetum, and Pennisetum Analysis of Nutritive Composition the results are shown in Table 9.
9 Pennisetum nutritional ingredient of table
3) herbage is Hemarthria herbage, and Hemarthria nutritional components the results are shown in Table 10.
10 Hemarthria nutritional components of table
From table 9, table 10, cibarium Wei Si Salmonellas provided by the invention are any with not adding as grass silage additive The control group of additive is compared, and can improve grass silage diet dry matter content, and the dry matter rate of recovery, crude protein content are promoted Grass silage quality of the fodder;Fiber content is reduced, palatability is improved, and then promotes grass silage quality of the fodder.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair The limitation of the present invention, protection scope of the present invention should be subject to claim limited range.For the art For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change Protection scope of the present invention is also should be regarded as into retouching.
Sequence table
<110>Sichuan Agricultural University
<120>A kind of cibarium Wei Si Salmonellas and its application, screening calibration method
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<213>Cibarium Wei Si Salmonellas (Weissella cibaria)
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ggctttgggt gttacaaact ctcatggtgt gacgggcggt gtgtacaaga cccgggaacg 60
tattcaccgc ggcgtgctga tccgcgatta ctagcgattc cgacttcatg taggcgagtt 120
gcagcctaca atccgaactg agacgtactt taagagatta gctcaccctc gcgggttggc 180
aactcgttgt atacgccatt gtagcacgtg tgtagcccag gtcataaggg gcatgatgat 240
ttgacgtcat ccccaccttc ctccggtttg tcaccggcag tctcactaga gtgcccaact 300
aaatgctggc aactagtaat aagggttgcg ctcgttgcgg gacttaaccc aacatctcac 360
gacacgagct gacgacaacc atgcaccacc tgtcaccttg tccccgaagg gaacgctcca 420
tctctggagt tgtcaaggga tgtcaagacc tggtaaggtt cttcgcgttg cttcgaatta 480
aaccacatgc tccaccgctt gtgcgggtcc ccgtcaattc ctttgagttt caaccttgcg 540
gtcgtactcc ccaggcggag tgcttaatgc gttagctgcg gcacttaagg gcggaaaccc 600
tcaaacacct agcactcatc gtttacggtg tggactacca gggtatctaa tcctgtttgc 660
tacccacact ttcgagcctc aacgtcagtt acagtccaga aagccgcctt cgccactggt 720
gttcttccat atatctacgc atttcaccgc tacacatgga gttccacttt cctctactgc 780
actcaagtca tccagtttcc aaagcaattc ctcagttgag ctgagggctt tcacttcaga 840
cttaaataac cgtctgcgct cgctttacgc ccaataaatc cggataacgc ttggaacata 900
cgtattaccg cggctgctgg cacgtattta gccgttcctt tctggtaaga taccgtcaca 960
cattgaacag ttactctcaa tgtcattctt ctcttacaac agtgttttac gagccgaaac 1020
ccttcatcac acacgcggcg ttgctccatc aggctttcgc ccattgtgga agattcccta 1080
ctgctgcctc ccgtaggagt atgggccgtg tctcagtccc attgtggccg atcagtctct 1140
caactcggct atgcatcatc gtcttggtga gccattacct caccaactaa ctaatgcacc 1200
gcgggaccat ctcttagtga tagcagaacc atcttttaag tagcaaccat gcggttgcta 1260
ttgttatacg gtattagcat ctgtttccaa atgttatccc ctgctaagag gtaggtttcc 1320
cacgtgttac tcacccgttc gccactcttt gcaatgtcca tcgtcatatc tgagcaagct 1380
cttcaaatca 1390
<210> 2
<211> 20
<212> DNA
<213>Artificial sequence (unknown)
<400> 2
agagtttgat cctggctcag 20
<210> 3
<211> 19
<212> DNA
<213>Artificial sequence (unknown)
<400> 3
ggttaccttg ttacgactt 19

Claims (10)

1. a kind of cibarium Wei Si Salmonellas, which is characterized in that during the cibarium Wei Si Salmonellas (Weissella cibaria) are preserved in State's Microbiological Culture Collection administration committee common micro-organisms center, deposit number are CGMCC No.15075.
2. cibarium Wei Si Salmonellas described in claim 1, which is characterized in that the 16srDNA such as SEQ of the cibarium Wei Si Salmonellas Shown in ID NO.1.
3. the application of cibarium Wei Si Salmonellas described in claim 1, which is characterized in that the cibarium Wei Si Salmonellas are preparing herbage Application in additives for ensiling.
4. the application of the cibarium Wei Si Salmonellas described in claim 3, which is characterized in that the cibarium Wei Si Salmonellas are preparing wolf tail Grass belongs to the application in herbage and Hemarthria grass silage additive.
5. a kind of screening calibration method of cibarium Wei Si Salmonellas described in claim 1, which is characterized in that comprise the following steps:
1) Forage Grass is taken, is drawn after dilution and is applied to MRS solid medium cultures, is chosen after single bacterium colony supports and continue culture, even Continuous secondary culture is no less than 2 times, the bacterium colony purified;
2) after the bacterium colony for the purifying for obtaining step 1) is cultivated on lactic acid bacteria solid medium under the conditions of constant-temperatureanaerobic anaerobic, lead to Gram's staining and catalase haptoreaction are crossed, carries out the identification of lactic acid bacteria, the lactic acid bacteria after identification is added in containing sterilizing It in the liquid nutrient media of glycerine, and stores, the lactic acid bacteria isolated and purified;
3) after the lactic acid bacteria isolated and purified for obtaining step 2) carries out actication of culture, it is inoculated into MRS fluid nutrient mediums Culture, obtains bacterium solution;The bacterium solution pH and OD values are measured, screening pH=3.76, OD value=1.641 are carried out according to measurement result Bacterium solution obtains the bacterial strain after tentatively screening;
4) after the bacterial strain after the preliminary screening for obtaining step 3) carries out Anaerobic culturel, the DNA extractions of single strain are carried out, with The DNA of extraction carries out PCR amplification for template and obtains amplified production, and the amplified production is the cibarium Wei Si Salmonellas.
6. screening calibration method according to claim 5, which is characterized in that the Forage Grass is Pennisetum sample Product.
7. screening calibration method according to claim 5, which is characterized in that the step specifically includes:
1) Forage Grass is taken, sterile distilled water is added in, is diluted to 10-1, 10-3With 10-5The sample diluting liquid of three dilution factors;It inhales Sample diluting liquid is taken to be applied to MRS solid medium cultures, continuous passage culture 2 times, the bacterium colony purified;
2) bacterium colony for the purifying for obtaining step 1) is cultivated on lactic acid bacteria solid medium under the conditions of 37 DEG C of constant-temperatureanaerobic anaerobics After for 24 hours, by Gram's staining and catalase haptoreaction, the identification of lactic acid bacteria is carried out, the lactic acid bacteria after identification is added Enter in the liquid nutrient media containing sterile glycerol, and with -80 DEG C of storages, the lactic acid bacteria isolated and purified;
3) after the lactic acid bacteria isolated and purified for obtaining step 2) carries out actication of culture, it is inoculated into 3% inoculum concentration In 10ml MRS fluid nutrient mediums, with 40~45 DEG C of temperature, humidity 85%~98% cultivates 12h, obtains bacterium solution;Measure the bacterium Liquid pH and OD values carry out the bacterium solution of screening pH=3.76, OD value=1.641 according to measurement result, obtain the bacterium after tentatively screening Strain;
4) bacterial strain after the preliminary screening for obtaining step 3) is carried out after Anaerobic culturel 48h under the conditions of 37 DEG C of temperature, into The DNA extractions of row single strain carry out PCR amplification as template using the DNA of extraction and obtain amplified production, and the amplified production is institute State cibarium Wei Si Salmonellas.
8. screening calibration method according to claim 5, which is characterized in that the DNA using extraction carries out PCR as template Amplification obtains amplified production process and is specially:With sense primer:5 ,-AGAGTTTGATCCTGGCTCAG-3, anti-sense primer:5 ,- GGTTACCTTGTTACGACTT-3 is that specific primer is that template progress PCR amplification obtains amplified production to the DNA of extraction, institute Stating pcr amplification reaction condition is:After 95 DEG C of pre-degeneration 5min, 95 DEG C of denaturation 30s, 55 DEG C of annealing 30s, 72 DEG C extend 90s, cycle 30 times, then 72 DEG C of extension 5min.
9. screening calibration method according to claim 5, which is characterized in that the screening calibration method further includes:It will step The rapid cibarium Wei Si Salmonellas 4) obtained pass through physiological and biochemical test, Salt tolerance, different temperatures experiment, acid resistance test and sugar Fermentation test evaluation test is analyzed.
10. screening calibration method according to claim 5, which is characterized in that the screening calibration method further includes:It will step The rapid cibarium Wei Si Salmonellas 4) obtained carry out 16S rDNA sequence analyses.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109402010A (en) * 2018-11-16 2019-03-01 大连工业大学 A method of utilizing Lactococcus lactis M10 and the smelly mandarin fish of cibarium Wei Si Salmonella M3 combined inoculation Rapid Fermentation
CN114703084A (en) * 2022-01-28 2022-07-05 黑龙江八一农垦大学 Weissella cibaria with broad-spectrum antibacterial activity
CN117229980A (en) * 2023-11-08 2023-12-15 北京市农林科学院 Weissella sinica fermented feed and application and deodorization effect thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109402010A (en) * 2018-11-16 2019-03-01 大连工业大学 A method of utilizing Lactococcus lactis M10 and the smelly mandarin fish of cibarium Wei Si Salmonella M3 combined inoculation Rapid Fermentation
CN109402010B (en) * 2018-11-16 2021-09-24 大连工业大学 Method for rapidly fermenting smelly mandarin fish by mixed inoculation of lactococcus lactis M10 and Weissella cibaria M3
CN114703084A (en) * 2022-01-28 2022-07-05 黑龙江八一农垦大学 Weissella cibaria with broad-spectrum antibacterial activity
CN114703084B (en) * 2022-01-28 2023-06-23 黑龙江八一农垦大学 Weissella food with broad-spectrum antibacterial activity
CN117229980A (en) * 2023-11-08 2023-12-15 北京市农林科学院 Weissella sinica fermented feed and application and deodorization effect thereof
CN117229980B (en) * 2023-11-08 2024-01-30 北京市农林科学院 Weissella sinica fermented feed and application and deodorization effect thereof

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