Ethanol tolerance and the variation of plasma membrane composition of yeast floc populations with different size distribution.

Ethanol tolerance and the variation of plasma membrane composition of yeast floc populations with different size distribution. Research Abstract Details 

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Ethanol tolerance and the variation of plasma membrane composition of yeast floc populations with different size distribution. Abstract Text:

Juanjuan Lei,Xinqing Zhao,Xumeng Ge,Fengwu Bai,

The ethanol tolerance of a self-flocculating yeast strain SPSC01 was investigated in an oxygen-limited fed-batch bioreactor. Employing Focused Beam Reflectance Measurement (FBRM) on-line monitoring system, four yeast floc populations with the average size ranging from 100 to 400mum were obtained. It was found that ethanol tolerance increased with the increasing floc size in the 100, 200, and 300mum floc populations, while increasing the average floc size further to 400mum resulted in lower ethanol tolerance. Examination of the membrane composition of different floc populations revealed that the plasma membrane composition of the floc populations was significantly different in the contents of ergosterol, phosphatidylinositol, as well as phospholipid palmitoleic acid. What's more, the plasma membrane of more ethanol tolerant floc population was less permeable when subjected to 15% (v/v) ethanol shock treatment, and the plasma membrane ATPase activities were higher in the floc populations with higher ethanol tolerance. These results indicate that the average size distribution of the floc populations exerted great influence on the physiological status of yeast cells during the ethanol production process, leading to the changes in plasma membrane composition that contributed to improved ethanol tolerance in self-flocculating yeast SPSC01.

Ethanol tolerance and the variation of plasma membrane composition of yeast floc populations with different size distribution. Publishing Authors By Initials

J Lei,X Zhao,X Ge,F Bai,

For similar fungi: yeasts research abstracts see: fungi: yeasts research

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Ethanol tolerance and the variation of plasma membrane composition of yeast floc populations with different size distribution. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of biotechnology

VOLUME: 131

Page Numbers: 270-5

Journal Abbreviation: J. Biotechnol.

ISSN: 0168-1656

DAY: 22

MONTH: 07

YEAR: 2007

Ethanol tolerance and the variation of plasma membrane composition of yeast floc populations with different size distribution. Information

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LANGUAGE: eng

NlmUniqueID: 8411927

Ethanol tolerance and the variation of plasma membrane composition of yeast floc populations with different size distribution. Keywords Mesh Terms:

KEYWORDS: Yeasts

MESH TERMS: physiology

Chemical & Substance for Abstract: Ethanol tolerance and the variation of plasma membrane composition of yeast floc populations with different size distribution. Information

Substance Name: Ethanol

Registry Number: 64-17-5

Grant and Affiliation Information for Ethanol tolerance and the variation of plasma membrane composition of yeast floc populations with different size distribution.

AFFILIATION: Department of Bioscience and Bioengineering, Dalian University of Technology, No. 2 Longgong Road, Dalian 116024, China.

Country: Netherlands

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MEDLINETA: J Biotechnol

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