Journal
FEBS LETTERS
Volume 566, Issue 1-3, Pages 115-120Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.febslet.2004.04.015
Keywords
abiotic stress; phosphatidylcholine synthesis; differential gene expression; choline kinase; Arabidopsis thaliana
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Increasing evidence suggests a major role for phosphatidylcholine (PC) in plant stress adaptation. The present work investigated the regulation of choline, PC and interconnected phosphatidylethanolamine biosynthesis in Arabidopsis thaliana L. as a function of cold- and salt- or mannitol-mediated hyperosmotic stresses. While PC synthesis is accelerated in both salt- and cold-treated plants, the choline kinase (CK) and phosphocholine cytidylyltransferase genes are oppositely regulated with respect to these abiotic treatments. Salt stress also stimulates CK activity in vitro. A possible regulatory role of CK in stimulating PC biosynthesis rate in salt-stressed plants is discussed. (C) 2004 Published by Elsevier B.V. on behalf of the Federation of European Biochemical Societies.
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