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Higher thermal and ethanol tolerance of a yeast strain isolated from oral cavity

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Title Higher thermal and ethanol tolerance of a yeast strain isolated from oral cavity
 
Creator Tahar, Imen Ben
Fickers, Patrick
Górka, Anna
Telek, Samuel
Kus-Liśkiewicz, Małgorzata
 
Subject beta-Glucan
Biofuel
Saccharomyces cerevisiae
Thermotolerant
Trehalose
 
Description 798-803
Efficient bioethanol producing microorganisms must be endowed with peculiar physiological and technological traits, such as, higher thermal and ethanol tolerance. This encompasses a strain thermotolerance and an ability to grow at elevated sugar and ethanol concentration or ability to sustain dehydration process such as freeze drying. In this study, we characterized a thermotolerant yeast strain isolated from the human oral cavity regarding the above mentioned parameters. Such an uncommon niche was considered as the great potential reservoir, to isolate strains endowed with metabolic aptitudes requested for ethanol production. In the process, we have defined the YTerm-1strain ability to sustain high sugar and ethanol concentration that are two technological constrains in bioethanol production. Finally, we highlighted that the strain YTerm-1 was able to accumulate, at a high level, trehalose and β-glucan, two compounds conferring the cells an
increased resistance to freeze drying process and osmotic stress. Our results suggest that the Yterm-1 strain showed a better
growth ability and higher ethanol yield as compared to the industrial strain. Other metabolic traits, such as resistance to
dehydration stress, tolerance to ethanol, accumulation of intracellular trehalose or membrane β-glucan confer to that isolate
all the characteristics requested in industrial production of ethanol.
 
Date 2021-11-02T09:48:46Z
2021-11-02T09:48:46Z
2021-11
 
Type Article
 
Identifier 0975-1009 (Online); 0019-5189 (Print)
http://nopr.niscair.res.in/handle/123456789/58408
 
Language en
 
Publisher CSIR-NIScPR
 
Source IJEB Vol.59(11) [November 2021]