Fatty acid unsaturation, mobilization, and regulation in the response of plants to stress.

Author(s): Robert Upchurch

Publication date: 2008-05-31

Journal: Biotechnology Letters

Keywords: Arabidopsis, metabolism, microbiology, Aspergillus, physiology, Cold Temperature, Dehydration, Fatty Acid Desaturases, Host-Pathogen Interactions, Hot Temperature, Membrane Fluidity, Metals, Heavy, Plant Diseases, Plant Physiological Phenomena, Salinity, alpha-Linolenic Acid

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Abstract

Stress acclimating plants respond to abiotic and biotic stress by remodeling membrane fluidity and by releasing alpha-linolenic (18:3) from membrane lipids. The modification of membrane fluidity is mediated by changes in unsaturated fatty acid levels, a function provided in part by the regulated activity of fatty acid desaturases. Adjustment of membrane fluidity maintains an environment suitable for the function of critical integral proteins during stress. alpha-Linolenic acid, released from membrane lipid by regulated lipase activity, is the precursor molecule for phyto-oxylipin biosynthesis. The modulation of chloroplast oleic acid (18:1) levels is central to the normal expression of defense responses to pathogens in Arabidopsis. Oleic (18:1) and linolenic (18:2) acid levels, in part, regulate development, seed colonization, and mycotoxin production by Aspergillus spp.

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PubMed ID:: 18227974

DOI:: 10.1007/s10529-008-9639-z

ScienceOpen disciplines: Chemistry

Keywords: Arabidopsis,metabolism,microbiology,Aspergillus,physiology,Cold Temperature,Dehydration,Fatty Acid Desaturases,Host-Pathogen Interactions,Hot Temperature,Membrane Fluidity,Metals, Heavy,Plant Diseases,Plant Physiological Phenomena,Salinity,alpha-Linolenic Acid

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ScienceOpen disciplines: Chemistry

Keywords: Arabidopsis, metabolism, microbiology, Aspergillus, physiology, Cold Temperature, Dehydration, Fatty Acid Desaturases, Host-Pathogen Interactions, Hot Temperature, Membrane Fluidity, Metals, Heavy, Plant Diseases, Plant Physiological Phenomena, Salinity, alpha-Linolenic Acid

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