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Oleic acid metabolism: A biochemical marker for studying photoregulation of epicotyl elongation in Vigna unguiculata
Author(s) -
March Ghislaine,
Tréimolières Antoine,
Lecharny Alain
Publication year - 1984
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1984.tb06083.x
Subject(s) - epicotyl , oleic acid , vigna , phosphatidylethanolamine , elongation , biology , biochemistry , metabolism , botany , plant stem , fatty acid , chemistry , phosphatidylcholine , hypocotyl , phospholipid , materials science , membrane , ultimate tensile strength , metallurgy
Oleic acid metabolism can be considered to be an indicator of growth photoregulation in cowpea ( Vigna unguiculata Westphal cv. M53) epicotyls. Phosphatidylcholine and phosphatidylethanolamine are the two lipid classes concerned in the photoregulation of oleic acid accumulation. The incorporation of radioactive precursors in internodes of whole plants has shown that there is de novo synthesis of these phospholipids during the light dependent growth process. The variations in oleic acid content were used to study the photocontrol of elongation in segments excised from the apical part of the epicotyl. In this system, as in whole plants, oleic acid was the only fatty acid showing significant variation related to the light/dark treatments. Differences in photoresponse between excised intenode segments and internodes in whole plants are discussed.