Differences in response of Zymomonas mobilis and Saccharomyces cerevisiae to change in extracellular ethanol concentration
In high cell density batch fermentations, Zymomonas mobilis produced 91 g L−1 ethanol in 90 min but culture viability fell significantly. Similar viability losses in rapid fermentations by yeast have recently been shown to be attributable in part to the high rate of change of the extracellular ethan...
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| Veröffentlicht in: | Biotechnology and bioengineering 1994-01, Vol.43 (2), p.155-158 |
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| creator | Hobley, T. J. Pamment, N. B. |
| description | In high cell density batch fermentations, Zymomonas mobilis produced 91 g L−1 ethanol in 90 min but culture viability fell significantly. Similar viability losses in rapid fermentations by yeast have recently been shown to be attributable in part to the high rate of change of the extracellular ethanol concentration. However, in simulated rapid fermentations in which ethanol was pumped continuously to low cell density Z. mobilis suspensions, increases in the rate of change of ethanol concentration in the range 21–83 g L−1 h−1 did not lead to accelerated viability losses. The lag phase of Zymomonas cultures exposed to a 30‐g L−1 step change in ethanol concentration was much shorter than that of Saccharomyces cerevisiae, providing evidence that the comparative insensitivity of Zymomonas to high rates of change of ethanol concentration is due to its ability to adapt to changes in ethanol concentration more rapidly than yeast. © 1994 John Wiley & Sons, Inc. |
| doi_str_mv | 10.1002/bit.260430208 |
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The lag phase of Zymomonas cultures exposed to a 30‐g L−1 step change in ethanol concentration was much shorter than that of Saccharomyces cerevisiae, providing evidence that the comparative insensitivity of Zymomonas to high rates of change of ethanol concentration is due to its ability to adapt to changes in ethanol concentration more rapidly than yeast. © 1994 John Wiley & Sons, Inc.</description><identifier>ISSN: 0006-3592</identifier><identifier>EISSN: 1097-0290</identifier><identifier>DOI: 10.1002/bit.260430208</identifier><identifier>PMID: 18615609</identifier><identifier>CODEN: BIBIAU</identifier><language>eng</language><publisher>Hoboken: Wiley Subscription Services, Inc., A Wiley Company</publisher><subject>09 BIOMASS FUELS ; 090900 - Biomass Fuels- Processing- (1990-) ; adaptation ; ALCOHOLS ; BACTERIA ; Biological and medical sciences ; BIOLOGICAL VARIABILITY ; Biotechnology ; ETHANOL ; EUMYCOTA ; Fundamental and applied biological sciences. 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J.</creatorcontrib><creatorcontrib>Pamment, N. B.</creatorcontrib><title>Differences in response of Zymomonas mobilis and Saccharomyces cerevisiae to change in extracellular ethanol concentration</title><title>Biotechnology and bioengineering</title><addtitle>Biotechnol. Bioeng</addtitle><description>In high cell density batch fermentations, Zymomonas mobilis produced 91 g L−1 ethanol in 90 min but culture viability fell significantly. Similar viability losses in rapid fermentations by yeast have recently been shown to be attributable in part to the high rate of change of the extracellular ethanol concentration. However, in simulated rapid fermentations in which ethanol was pumped continuously to low cell density Z. mobilis suspensions, increases in the rate of change of ethanol concentration in the range 21–83 g L−1 h−1 did not lead to accelerated viability losses. The lag phase of Zymomonas cultures exposed to a 30‐g L−1 step change in ethanol concentration was much shorter than that of Saccharomyces cerevisiae, providing evidence that the comparative insensitivity of Zymomonas to high rates of change of ethanol concentration is due to its ability to adapt to changes in ethanol concentration more rapidly than yeast. © 1994 John Wiley & Sons, Inc.</description><subject>09 BIOMASS FUELS</subject><subject>090900 - Biomass Fuels- Processing- (1990-)</subject><subject>adaptation</subject><subject>ALCOHOLS</subject><subject>BACTERIA</subject><subject>Biological and medical sciences</subject><subject>BIOLOGICAL VARIABILITY</subject><subject>Biotechnology</subject><subject>ETHANOL</subject><subject>EUMYCOTA</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>FUNGI</subject><subject>GENETIC VARIABILITY</subject><subject>HYDROXY COMPOUNDS</subject><subject>inhibition</subject><subject>Methods. Procedures. 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However, in simulated rapid fermentations in which ethanol was pumped continuously to low cell density Z. mobilis suspensions, increases in the rate of change of ethanol concentration in the range 21–83 g L−1 h−1 did not lead to accelerated viability losses. The lag phase of Zymomonas cultures exposed to a 30‐g L−1 step change in ethanol concentration was much shorter than that of Saccharomyces cerevisiae, providing evidence that the comparative insensitivity of Zymomonas to high rates of change of ethanol concentration is due to its ability to adapt to changes in ethanol concentration more rapidly than yeast. © 1994 John Wiley & Sons, Inc.</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><pmid>18615609</pmid><doi>10.1002/bit.260430208</doi><tpages>4</tpages></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | 09 BIOMASS FUELS 090900 - Biomass Fuels- Processing- (1990-) adaptation ALCOHOLS BACTERIA Biological and medical sciences BIOLOGICAL VARIABILITY Biotechnology ETHANOL EUMYCOTA Fundamental and applied biological sciences. Psychology FUNGI GENETIC VARIABILITY HYDROXY COMPOUNDS inhibition Methods. Procedures. Technologies Microbial engineering. Fermentation and microbial culture technology MICROORGANISMS ORGANIC COMPOUNDS PLANTS SACCHAROMYCES SACCHAROMYCES CEREVISIAE VIABILITY yeast YEASTS YIELDS Zymomonas ZYMOMONAS MOBILIS |
| title | Differences in response of Zymomonas mobilis and Saccharomyces cerevisiae to change in extracellular ethanol concentration |
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