Trienoic fatty acids and plant tolerance of temperature

Oléagineux, Corps gras, Lipides. 2002;9(1):43-47 DOI 10.1051/ocl.2002.0000

 

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Journal Title: Oléagineux, Corps gras, Lipides

ISSN: 1258-8210 (Print); 1950-697X (Online)

Publisher: John Libbey Eurotext

Society/Institution: ETIG

LCC Subject Category: Technology: Chemical technology: Oils, fats, and waxes

Country of publisher: France

Language of fulltext: French, English

Full-text formats available: PDF, HTML

 

AUTHORS

Routaboul Jean-Marc
Browse John

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Time From Submission to Publication: 10 weeks

 

Abstract | Full Text

The biophysical reactions of light harvesting and electron transport during photosynthesis take place in a uniquely constructed bilayer, the thylakoid. In all photosynthetic eukaryotes, the complement of atypical glycerolipid molecules that form the foundation of this membrane are characterised by sugar head-groups and a very high level of unsaturation in the fatty acids that occupy the central portion of the thylakoid bilayer. alpha-linolenic (18:3) or a combination of 18:3 and hexadecatrienoic (16:3) acids typically account for approximately two-thirds of all thylakoid membrane fatty acids and over 90% of the fatty acids of monogalactosyl diacylglycerol, the major thylakoid lipid [1, 2]. The occurrence of trienoic fatty acids as a major component of the thylakoid membrane is especially remarkable since these fatty acids form highly reactive targets for active oxygen species and free radicals, which are often the by-products of oxygenic photosynthesis. Photosynthesis is one of the most temperature-sensitive functions of plant [3, 4]. There remains a widespread belief that these trienoic fatty acids might have some crucial role in plants to be of such universal occurrence, especially in photosynthesis tolerance of temperature [5].