In situ and IAA-induced cell elongation is correlated to the oleoyl phosphatidylcholine content along the Vigna radiata hypocotyl

Successive segments of mung bean hypocotyls (Vigna radiata) show fatty acid changes according to the lengths of their cells. Only the accumulation of oleic acid was related to the growth process; its level was markedly increased all along the hypocotyl. When segments were treated with IAA in vitro,...

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Bibliographic Details
Published in:Plant and cell physiology 1983-04, Vol.24 (3), p.541-549
Main Authors: Goldberg, R, Prat, R. (Ecole Normale Superieure, Paris (France)), Dubacq, J.P
Format: Article
Language:English
Subjects:
ACIDE OLEIQUE
ACIDO OLEICO
Auxin (cell elongation)
AUXINAS
AUXINE
AUXINS
HIPOCOTILOS
HYPOCOTYLE
HYPOCOTYLS
LECITHINE
LECITHINS
LECITINAS
OLEIC ACID
Phosphatidylcholine
VIGNA RADIATA
Vigna radiata(hypocotyl)
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Summary:Successive segments of mung bean hypocotyls (Vigna radiata) show fatty acid changes according to the lengths of their cells. Only the accumulation of oleic acid was related to the growth process; its level was markedly increased all along the hypocotyl. When segments were treated with IAA in vitro, all that had increments in length also had increased oleic acid contents. These two factors were highly correlated. Phosphatidylcholine, and to a less extent phosphatidylethanolamine, were the two phospholipids involved in this phenomenon. Fusicoccin increased cell length but made little, if any, change in the fatty acid content. These results have been interpreted in terms of membrane synthesis and transfer of the membrane from the endoplasmic reticulum toward the plasmalemma and tonoplast.
ISSN:0032-0781
1471-9053
1471-9053
DOI:10.1093/oxfordjournals.pcp.a076546