Improvement of thermotolerance in Lachancea thermotolerans using a bacterial selection pressure
| Autor: | Jure Piškur, Nerve Zhou, Concetta Compagno, Wolfgang Knecht, Olena P. Ishchuk |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Thermotolerance
Hot Temperature Yeast-bacteria coevolution Bioengineering Biology Ethanol fermentation Applied Microbiology and Biotechnology 03 medical and health sciences Stress Physiological Extreme environment Food science 030304 developmental biology Gene Rearrangement 2. Zero hunger 0303 health sciences Experimental evolution Bacteria Ethanol Strain (chemistry) 030306 microbiology biology.organism_classification Yeast Oxidative Stress Fermentation Cell Culture and Bioengineering - Original Paper Karyotyping Fermentation Saccharomycetales Alcoholic fermentation Biotechnology Mesophile |
| Zdroj: | Journal of Industrial Microbiology & Biotechnology |
| ISSN: | 1476-5535 1367-5435 |
| DOI: | 10.1007/s10295-018-2107-4 |
| Popis: | The use of thermotolerant yeast strains is an important attribute for a cost-effective high temperature biofermentation processes. However, the availability of thermotolerant yeast strains remains a major challenge. Isolation of temperature resistant strains from extreme environments or the improvements of current strains are two major strategies known to date. We hypothesised that bacteria are potential “hurdles” in the life cycle of yeasts, which could influence the evolution of extreme phenotypes, such as thermotolerance. We subjected a wild-type yeast, Lachancea thermotolerans to six species of bacteria sequentially for several generations. After coevolution, we observed that three replicate lines of yeasts grown in the presence of bacteria grew up to 37 °C whereas the controls run in parallel without bacteria could only grow poorly at 35 °C retaining the ancestral mesophilic trait. In addition to improvement of thermotolerance, our results show that the fermentative ability was also elevated, making the strains more ideal for the alcoholic fermentation process because the overall productivity and ethanol titers per unit volume of substrate consumed during the fermentation process was increased. Our unique method is attractive for the development of thermotolerant strains or to augment the available strain development approaches for high temperature industrial biofermentation. |
| Databáze: | OpenAIRE |
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