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СЕЛЕКЦИЯ АНАЭРОБНОГО ЦЕЛЛЮЛОЛИТИЧЕСКОГО ТЕРМОФИЛЬНОГО ШТАММА CLOSTRіDіUM THERMOCELLUM 5СТ

СЕЛЕКЦИЯ АНАЭРОБНОГО ЦЕЛЛЮЛОЛИТИЧЕСКОГО ТЕРМОФИЛЬНОГО ШТАММА CLOSTRіDіUM THERMOCELLUM 5СТ

Abstract

Selection of anaerobic thermophilic cellulolytic strain of Clostridium thermocellum 5ST was performed under multiple reinoculations and effect of increasing concentrations of the exogenous compounds. Culture growth was evaluated by biomass formation, final metabolite products accumulation, and intensity of cellulose hydrolysis. Obtained Clostridium thermocellum 5СТ culture was resistant to ethanol at concentration 2%. It is shown that hydrogen adding to culture medium up to 100% vol. doesn’t inhibit growth of the culture, results in increasing of ethanol formation in two times, and decreases acetate formation in 2.5 times. Sodium acetate adding in low concentrations doesn’t inhibit growth of the culture, whereas 50.0% vol. in the media inhibits essentially growth of the culture; cellulose hydrolysis in this case decreases in 1.5 times. Selected anaerobic cellulolytic thermophilic strain C. thermocellum 5СТ can be used in biotechnological processes for perspective energy carriers and thermostable enzymes obtaining.

Проведена селекция анаэробного термофильного целлюлолитического штамма Clostridium thermocellum 5СТ многократным пересеванием и действием возрастающих концентраций экзогенных химических соединений. Рост культуры оценивали по образованию биомассы, накоплению конечных продуктов метаболизма и интенсивности гидролиза целлюлозы. Полученная культура Clostridium thermocellum 5СТ резистентна к этанолу в концентрации 2%. Показано, что введение водорода в среду культивирования до концентрации 100% об. не ингибирует рост культуры, приводит к увеличению образования этанола в 2 раза и снижению образования ацетата в 2,5 раза. Введение ацетата натрия в малых концентрациях также не угнетает рост культуры, в то время как 50,0% об. в среде существенно ингибирует его; гидролиз целлюлозы в этом случае снижается в 1,5 раза. Селекционированный анаэробный целлюлолитический термофильный штамм C. thermocellum 5СТ может использоваться в биотехнологических процессах для получения перспективных энергоносителей и термостабильных энзимов.

Keywords

АНАЕРОБНі ТЕРМОФіЛЬНі ЦЕЛЮЛОЛіТИЧНі БАКТЕРії, CLOSTRіDіUM THERMOCELLUM, ЗБРОДЖУВАННЯ ЦЕЛЮЛОЗИ, АНАЭРОБНЫЕ ТЕРМОФИЛЬНЫЕ ЦЕЛЛЮЛОЛИТИЧЕСКИЕ БАКТЕРИИ, БРОЖЕНИЕ ЦЕЛЛЮЛОЗЫ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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