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Yeast adaptation to 2,4-dichlorophenoxyacetic acid involves increased membrane fatty acid saturation degree and decreased OLE1 transcription.

Abstract：

:Yeast cells adapted to the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) exhibit a plasma membrane less susceptible to 2,4-D-induced disruption and are more tolerant than unadapted cells to lethal concentrations of the herbicide. These cells, adapted to grow in the presence of increasing concentrations of 2,4-D, were found to exhibit a dose-dependent increase of the saturation degree of membrane fatty acids, associated to the higher percentage of stearic (C(18:0)) and palmitic (C(16:0)) acids, and to the decreased percentage of palmitoleic (Delta9-cisC(16:1)) and oleic (Delta9-cisC(18:1)) acids. The decreased transcription of the OLE1 gene (encoding the Delta9 fatty acid desaturase that catalyses the conversion of palmitic and stearic acids to palmitoleic and oleic acids, respectively) registered in 2,4-D adapted cells suggests that yeast adaptation to the herbicide involves the enhancement of the ratio of saturated (C(16:0) and C(18:0)) to monounsaturated (C(16:1) and C(18:1)) membrane fatty acids through a reduced OLE1 expression.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Viegas CA,Cabral MG,Teixeira MC,Neumann G,Heipieper HJ,Sá-Correia I

doi

10.1016/j.bbrc.2005.02.158

subject

Has Abstract

pub_date

2005-04-29 00:00:00

pages

271-8

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(05)00437-7

journal_volume

330

pub_type

杂志文章

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