CN107488614A - For the bacterial strains of XC 3 for Starch in Tobacco of degrading and its application - Google Patents

For the bacterial strains of XC 3 for Starch in Tobacco of degrading and its application Download PDF

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CN107488614A
CN107488614A CN201710818116.XA CN201710818116A CN107488614A CN 107488614 A CN107488614 A CN 107488614A CN 201710818116 A CN201710818116 A CN 201710818116A CN 107488614 A CN107488614 A CN 107488614A
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tobacco
starch
tobacco leaf
microbial inoculum
bacterial strains
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CN107488614B (en
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冯颖杰
杨宗灿
刘向真
许衡
杨永锋
彭玉富
李家美
张耀广
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China Tobacco Henan Industrial Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/20Bacteria; Culture media therefor
    • C12N1/205Bacterial isolates
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12RINDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
    • C12R2001/00Microorganisms ; Processes using microorganisms
    • C12R2001/01Bacteria or Actinomycetales ; using bacteria or Actinomycetales
    • C12R2001/07Bacillus
    • C12R2001/075Bacillus thuringiensis
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18Treatment of tobacco products or tobacco substitutes
    • A24B15/20Biochemical treatment
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/20Bacteria; Culture media therefor

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Abstract

The invention belongs to tobacco technical field of microbial fermentation, and in particular to one plant of bacterial strain of bacillus thuringiensis XC 3 for Starch in Tobacco of degrading and its application in tobacco fermentation.The bacterial strain is bacillus thuringiensis XC 3, is now preserved in Wuhan China typical culture collection center, and deposit number is CCTCC NO:M 2017352.The present invention devises the technical scheme that relatively simple microbial inoculum handles tobacco leaf so that the present invention has by the screening of specific bacterial strain:Technological process is relatively simple, and tobacco leaf processing cost is relatively low, and process cycle is shorter, can obviously reduce the technological merits such as content of starch in tobacco leaf, thus has preferably application value in field of cigarette producing technology.

Description

For the XC-3 bacterial strains for Starch in Tobacco of degrading and its application
Technical field
The invention belongs to tobacco technical field of microbial fermentation, and in particular to one plant of Su Yun for Starch in Tobacco of degrading Golden bacillus XC-3 bacterial strains and its application in terms of tobacco fermentation.
Background technology
Starch is the important carbohydrate accumulated during tobacco growing, is widely present in the cauline leaf of tobacco, it contains The height of amount and quality of tobacco are closely related.But the too high suction quality for tobacco product of content of starch be it is unfavorable, one Aspect can influence the speed and completeness burnt and sucked, and another aspect starch can produce in burning to be charred smell and a variety of be harmful into Point, harmful effect is produced to the color of tobacco.It is generally believed that external sound tobacco content of starch is l% ~ 2%, and China For 4% ~ 6%, Starch in Flue-cured is generally higher, it has also become restricts one of an important factor for domestic quality of tobacco improves.Therefore, it is sharp With suitable method by the starch degradation in tobacco leaf into small-molecule substances such as reduced sugars, be improve quality of tobacco effective way it One.And the hydrolysis of tobacco itself enzyme is relied on merely far from meeting the needs of cigarette industry is to high-quality raw tobacco material, How content of starch in tobacco leaf is reduced using biotechnology, so as to improve quality of tobacco, it has also become scientific worker is generally closed The problem of note.
The research of bioanalysis degraded tobacco leaf starch is mainly enzyme preparation method and microbial method, and the latter is so that its cost is cheap, behaviour Making the advantage such as simple turns into study hotspot, therefore screens specificity microorganism and be applied to tobacco fermentation, in effectively degraded tobacco leaf Macromolecular substances, the quick quality of tobacco that improves are of great practical significance.
The content of the invention
Present invention aims at provide one plant of bacillus thuringiensis XC- for being capable of efficient degradation Starch in Tobacco material 3 bacterial strains, so as to effectively facilitate the degraded of macromolecules starch in tobacco leaf, improve tobacco leaf overall quality.
The detailed technology scheme that the application is taken is as follows.
One plant of XC-3 bacterial strain for Starch in Tobacco of degrading, the bacterial strain is bacillus thuringiensisBacillus thuringiensi ), it is initially that its preservation is entitled by being separated in the C2F tobacco leaves of the Xuchang of Henan in 2013:Su Yun gold buds Spore bacillus XC-3, systematic name areBacillus thuringiensi XC-3, it is preserved in force on June 19th, 2017 Chinese China typical culture collection center(CCTCC), deposit number is CCTCC NO:M 2017352.
Using the microbial inoculum for degrading prepared by the XC-3 bacterial strains of Starch in Tobacco, be made by the steps and Into:
(1)Activated spawn, XC-3 bacterial strains are placed on primary dcreening operation solid medium, activation culture, specifically:It is living under the conditions of 37 DEG C Change 72 h of culture;
(2)Prepare seed liquor, picking step(1)Middle cultivated bacterium colony, is inoculated in liquid seed culture medium, 37 DEG C of shaking table trainings Support;
(3)Expand culture, by step(2)Middle seed liquor switching liquid secondary screening culture medium, is cultivated to OD600=1.8~2.0;
(4)Microbial inoculum is prepared, by step(3)Middle zymotic fluid centrifugation, abandons supernatant, then adds sterilized water and is suspended, adjusts viable bacteria Number is(9~10)×107Individual/mL.
In above-mentioned preparation process, medium component unit in terms of g/L,
The primary dcreening operation solid medium forms:Beef extract 5.0, peptone 10.0, NaCl 5.0, soluble starch 20.0, fine jade Cosmetics 15.0, pH 7.0~7.2;
The liquid seed culture medium forms:Beef extract 5.0, peptone 10.0, NaCl 5.0, pH 7.0~7.2;
The liquid secondary screening culture medium forms:Soluble starch 20.0, bean cake powder 20.0, pH 7.0~7.2.
Application of the microbial inoculum using prepared by XC-3 bacterial strains in tobacco leaf starch of degrading, by the mass ratio of tobacco leaf 2 ~ 4% Example, tobacco leaf surface is uniformly sprayed on by the microbial inoculum prepared, under the conditions of 35 DEG C ~ 40 DEG C of temperature, the h of the h of fermentation process 36 ~ 72 (It is preferred that under the conditions of 3% application ratio, 37 DEG C of processing 48h), after the completion of fermentation, then by tobacco leaf heat make bacterium and its production Raw amylase inactivation(70 ~ 100 DEG C of heating 10 ~ 30min, preferably 80 DEG C heating 20min).
A kind of method for reducing Starch in Tobacco content, comprises the following steps:
(1)Processing microbial inoculum is prepared, specifically, with bacillus thuringiensis XC-3 fermented and cultureds, being prepared into viable count is(9~ 10)×107Individual/mL aqua;
(2)By step(1)In it is prepared processing microbial inoculum uniformly spray under the conditions of pending tobacco leaf surface, 35 DEG C ~ 40 DEG C, ferment The h of 36 h ~ 72 is handled, after the completion of fermentation, then tobacco leaf, which is heated, inactivates bacterium and its caused amylase.
Using the higher starch of content in tobacco leaf as effect target in the present invention, screened by specific bacterial strain, and specific dose Amount uses, and preferably reduces the content of starch in tobacco leaf within a short period of time.Preliminary Determination result shows, Starch in Tobacco Up to 30% or so, tobacco leaf entirety aesthetic quality is also lifted more substantially degradation rate, shows preferable technique effect.
In general, the present invention devises the technology that relatively simple microbial inoculum handles tobacco leaf by the screening of specific bacterial strain Scheme so that the present invention has:Technological process is relatively simple, and tobacco leaf processing cost is relatively low, and process cycle is shorter, can substantially drop Content of starch in low tobacco leaf simultaneously improves the technological merits such as quality of tobacco, thus has in field of cigarette producing technology and preferably push away Wide application value.
Brief description of the drawings
Fig. 1 is aspect graph of the bacillus thuringiensis XC-3 bacterial strains under oil mirror;
Fig. 2 is the phylogenetic evolution tree based on bacillus thuringiensis XC-3 bacterial strain 16S rDNA gene orders structure.
Embodiment
Explanation is further explained to the application with reference to embodiment, with regard to following embodiments before specific embodiment is introduced In situations such as being related to partial material, experimental facilities be briefly discussed below.
Tobacco:
Tobacco leaf used in bacterial strain screening is the Xuchang of Henan in 2013 C2F tobacco leaves;Tobacco leaf used in the investigation of bacterial strain action effect is 2013 Henan table mountain C3F, is provided by China Tobacco Henan Industrial Co., Ltd.
Embodiment 1
The present embodiment is only briefly discussed below with regard to the screening and qualification process of XC-3 bacterial strains.
XC-3 bacterial strains, obtained by being separated in the C2F tobacco leaves of the Xuchang of Henan in 2013.Its bacterium colony is circular, transparent, wet Profit, surface sticks shape, the mm of diameter about 3, neat in edge.Form under oil mirror is as shown in figure 1, it is in shaft-like, gram that bacterial strain, which can be observed, Dyeing is shown as positive.
16S rDNA genetic fragments are used as universal primer, performing PCR and cloning and sequencing are entered to the bacterial strain, 1414 can be obtained Bp sequences, phylogenetic analysis is carried out, show strain X C-3 and bacillus thuringiensis(Bacillus thuringiensi)'s Homology is up to 99%, i.e., nearest with the affiliation of bacillus thuringiensis(As shown in Figure 2).
Physiological and biochemical analysis further is carried out to bacterial strain, as a result as shown in table 1.
The XC-3 bio-chemical characteristics results of table 1
Note:+ represent positive, be or can utilize ,-represent negative, no or can not utilize.
Finally, XC-3 bacterial strain category bacillus is thought in identification(Bacillus), its systematic name isBacillus thuringiensiXC-3, Wuhan China typical culture collection center is submitted on June 19th, 2017(CCTCC)Preservation(Ground Location:Wuhan University), preservation on June 30 in 2017 is accredited as survival, and its deposit number is CCTCC NO:M 2017352.
Embodiment 2
For screening gained XC-3 bacterial strains in embodiment 1 are used for into Starch in Tobacco of degrading, the bacterial strain need to be prepared into first and be easy to The microbial inoculum used, specific preparation process are as follows.
(1)Activated spawn, XC-3 bacterial strains are placed on primary dcreening operation solid medium, 72 h are cultivated under the conditions of 37 DEG C;
(2)Prepare seed liquor, picking step(1)Middle cultivated bacterium colony, is inoculated in liquid seed culture medium, 37 DEG C of shaking table trainings Support overnight;
(3)Expand culture, by step(2)Middle seed liquor switching liquid secondary screening culture medium, is cultivated to OD600=2.0 or so;
(4)Microbial inoculum is prepared, by step(3)Middle zymotic fluid centrifugation, abandons supernatant, then adds sterilized water and is suspended, adjusts viable bacteria Number is 10 × 107Individual/mL or so.
Embodiment 3
Using when prepared microbial inoculum handles tobacco leaf in embodiment 2, concretely comprise the following steps:
When handling tobacco leaf, according to the mass ratio of tobacco leaf 2 ~ 4%(Inoculum concentration), above-mentioned microbial inoculum is uniformly sprayed on cigarette with sprayer Leaf surface, it is 25% then to adjust moisture content in leaves content;After being placed under specific temperature conditions certain time of fermenting, 80 DEG C of processing 20 Min, inactivate bacterium and its caused amylase.
To determine the best use of condition of microbial inoculum(Fermentation time, temperature, inoculum concentration), inventor carried out orthogonal experiment and set Meter, related experiment process are briefly discussed below.
Tobacco sample:The tobacco leaf after extracting offal is taken, splits slabbing, is then uniformly divided into more parts, every part of 100 g.
Fermentation time, fermentation temperature, inoculum concentration:Respectively using fermentation time, fermentation temperature, inoculum concentration as influence factor, enter The level design of 3 factor 3 is gone, specific design is as follows:
The factor level table L of table 29(33
Note:A is fermentation time;B is fermentation temperature;C is inoculum concentration.
According to table 2, Three factors-levels orthogonal has been carried out(Table 3):
The orthogonal array L of table 39(33):
Note:A is fermentation time;B is fermentation temperature;C is inoculum concentration;Blank control CK is set simultaneously.
The detection of Starch Content of Tobacco uses tobacco business standard:《Tobacco and the measure continuous stream of tobacco product starch Dynamic method》(YC/T 216-2013);
Tobacco sensory quality is evaluated:By tobacco leaf chopping, cigarette specification is made(20+64)The mm of mm × 24.5 cigarette sample, (22±1)DEG C, relative humidity(60±2)Balanced in % climatic chamber to be evaluated after 48 h.Testing sample is delivered into cigarette in Henan Technique center, by 11 professional members of smoking of central interior to aroma quality(A), perfume quantity(B), concentration(C), soft and fine degree(D), pleasant impression (E), miscellaneous gas(F), excitant(G)Evaluated etc. index, each index is given a mark by 9 points of systems, as a result takes its average value.Sense organ Smoke panel test total score(T)=(A+B)× 2.3 + C × 1.5 + D + E + F + G.
Embodiment 4
Starch Content of Tobacco measurement result in embodiment 3, further carries out range analysis, as a result such as table 4:
The range analysis table of table 4
Note:A is fermentation time;B is fermentation temperature;C is inoculum concentration.
As known from Table 4, optimal level is combined as A2B3C3, i.e., the time is 48 h, fermentation temperature is 37 DEG C, inoculum concentration is 3%.By R values relatively:RA>RC>The influence of RB, i.e. fermentation time to whole action condition is maximum, next to that applying ratio Example, and the influence of fermentation temperature is minimum.
Because optimal combination is not in 9 groups of orthogonal processing schemes, therefore it is real that checking has been carried out to optimization processing scheme Test.As a result show, Starch Content of Tobacco is 4.68% after fermentation, with compareing(Content of starch is 6.67%)Compare, degradation rate reaches 29.83%。
Embodiment 5
Tobacco leaf is handled according to above-mentioned optimal case, tobacco sensory quality is evaluated afterwards, the results are shown in Table shown in 5.
The tobacco sensory quality of table 5 evaluates (dividing)
As shown in Table 5, after bacterium solution is handled, aroma quality, perfume quantity, flue gas concentration etc. significantly improve tobacco leaf, miscellaneous gas, thorn Swash property etc. substantially to mitigate, the improvement such as pleasant impression, soft and fine degree is obvious, and tobacco leaf total quality significantly improves(Total score improves 1.81 points).
In summary, bacterium solution is uniformly sprayed on to tobacco leaf surface to be fermented, in bacterium solution inoculum concentration 3%, temperature is 37 DEG C Under the conditions of ferment 48 h, the starch degradation rate in tobacco leaf is up to 29.83%;Tobacco leaf entirety aesthetic quality also obtains more obvious Lifting, thus the present invention is reducing Starch in Tobacco content, has preferably application prospect so as to lift quality of tobacco aspect.
In general, the XC-3 bacterial strains of acquisition are screened in the application, it derives from original bacterial strain in tobacco leaf, when its institute of utilization When preparing microbial inoculum processing tobacco leaf, ensuring for Starch in Tobacco degraded simultaneously, can be more effective without obvious side effect Promotion tobacco in macromolecular substances degrade to be formed it is all kinds of be advantageous to improve cigarette quality small-molecule substances, and then reduce Harmful components in cigarette smoke, improve the purpose of the interior quality of tobacco leaf.Meanwhile it is used for tobacco leaf starch in research before and drops The bacterial strain of solution is mostly bacillus subtilis, Rhizopus oryzae etc., rarely has the report that bacillus thuringiensis is used for tobacco leaf starch degradation Road, the present invention provide a new thinking without the optimization suspected of tobacco microorganism fermentation process.

Claims (6)

1. one plant of XC-3 bacterial strain for Starch in Tobacco of degrading, it is characterised in that the bacterial strain category bacillusBacillus, Preservation is entitled:Bacillus thuringiensis XC-3, systematic name areBacillus thuringiensi XC-3, in 2017 On June 30, in is preserved in Wuhan China typical culture collection center, and deposit number is CCTCC NO:M 2017352.
2. utilize the microbial inoculum for being used to degrade prepared by the XC-3 bacterial strains of Starch in Tobacco described in claim 1, it is characterised in that logical Following steps are crossed to be prepared:
(1)Activated spawn, XC-3 bacterial strains are placed on primary dcreening operation solid medium, activation culture;
(2)Prepare seed liquor, picking step(1)Middle cultivated bacterium colony, is inoculated in liquid seed culture medium, shaking table culture;
(3)Expand culture, by step(2)Middle seed liquor switching liquid secondary screening culture medium, is cultivated to OD600=1.8~2.0;
(4)Microbial inoculum is prepared, by step(3)Middle zymotic fluid centrifugation, abandons supernatant, then adds sterilized water and is suspended, adjusts viable bacteria Number is(9~10)×107Individual/mL.
3. the microbial inoculum prepared by XC-3 bacterial strains is utilized as claimed in claim 2, it is characterised in that in terms of g/L,
The primary dcreening operation solid medium forms:Beef extract 5.0, peptone 10.0, NaCl 5.0, soluble starch 20.0, fine jade Cosmetics 15.0, pH 7.0~7.2;
The liquid seed culture medium forms:Beef extract 5.0, peptone 10.0, NaCl 5.0, pH 7.0~7.2;
The liquid secondary screening culture medium forms:Soluble starch 20.0, bean cake powder 20.0, pH 7.0~7.2.
4. the application described in Claims 2 or 3 using the microbial inoculum prepared by XC-3 bacterial strains in cigarette, it is characterised in that be used for Degraded Starch in Tobacco.
5. the application using the microbial inoculum prepared by XC-3 bacterial strains in cigarette as claimed in claim 4, it is characterised in that press tobacco leaf The mass ratio of quality 2 ~ 4%, the microbial inoculum prepared is uniformly sprayed on tobacco leaf surface, under the conditions of 35 DEG C ~ 40 DEG C, fermentation process The h of 36h ~ 72, after the completion of fermentation, then tobacco leaf, which is heated, inactivates bacterium and its caused amylase.
6. the application using the microbial inoculum prepared by XC-3 bacterial strains in cigarette as claimed in claim 5, it is characterised in that press tobacco leaf The mass ratio of quality 3%, the microbial inoculum prepared is uniformly sprayed on tobacco leaf surface, under the conditions of 37 DEG C, fermentation process 48h.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109370937A (en) * 2018-10-29 2019-02-22 河南中烟工业有限责任公司 A kind of reconstituted tobacoo quality adjustment complex micro organism fungicide
CN109480328A (en) * 2018-10-29 2019-03-19 河南中烟工业有限责任公司 It is a kind of for improving the complex micro organism fungicide of quality of tobacco
CN110663990A (en) * 2019-10-21 2020-01-10 河南中烟工业有限责任公司 Method for processing inapplicable tobacco leaves and method for evaluating usability of processed tobacco shreds
CN112538401A (en) * 2020-11-19 2021-03-23 河南中烟工业有限责任公司 Preparation method of corn spice for cigarettes
CN113881603A (en) * 2021-11-04 2022-01-04 中国烟草总公司陕西省公司 Bacillus capable of degrading starch in tobacco leaves

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CN103756946A (en) * 2014-02-11 2014-04-30 河南中烟工业有限责任公司 Bacterium-enzyme combined preparation containing bacillussubtilis strain xp and application of bacterium-enzyme combined preparation in accelerating starch degradation in tobacco sheet
CN103756945A (en) * 2014-02-11 2014-04-30 河南中烟工业有限责任公司 Bacillus subtilis strain xp, bacterium-enzyme combined preparation and application of bacterium-enzyme combined preparation to degradation of starch compound in tobacco product

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Publication number Priority date Publication date Assignee Title
CN103756944A (en) * 2014-02-11 2014-04-30 河南中烟工业有限责任公司 Bacterium-enzyme combined preparation containing bacillussubtilis strain xp and application of bacterium-enzyme combined preparation in accelerating starch degradation in tobacco stem
CN103756946A (en) * 2014-02-11 2014-04-30 河南中烟工业有限责任公司 Bacterium-enzyme combined preparation containing bacillussubtilis strain xp and application of bacterium-enzyme combined preparation in accelerating starch degradation in tobacco sheet
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109370937A (en) * 2018-10-29 2019-02-22 河南中烟工业有限责任公司 A kind of reconstituted tobacoo quality adjustment complex micro organism fungicide
CN109480328A (en) * 2018-10-29 2019-03-19 河南中烟工业有限责任公司 It is a kind of for improving the complex micro organism fungicide of quality of tobacco
CN110663990A (en) * 2019-10-21 2020-01-10 河南中烟工业有限责任公司 Method for processing inapplicable tobacco leaves and method for evaluating usability of processed tobacco shreds
CN112538401A (en) * 2020-11-19 2021-03-23 河南中烟工业有限责任公司 Preparation method of corn spice for cigarettes
CN113881603A (en) * 2021-11-04 2022-01-04 中国烟草总公司陕西省公司 Bacillus capable of degrading starch in tobacco leaves

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