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Transient increase of phosphatidylcholine in plant cells in response to phosphate deprivation
Author(s) -
Jouhet Juliette,
Maréchal Eric,
Bligny Richard,
Joyard Jacques,
Block Maryse A
Publication year - 2003
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(03)00477-0
Subject(s) - diacylglycerol kinase , galactolipids , galactolipid , phosphate , phospholipid , phosphatidylcholine , biochemistry , chemistry , hydrolysis , enzyme , diglyceride , monoacylglycerol lipase , membrane , gene , protein kinase c , chloroplast , endocannabinoid system , receptor
In plants, phosphate deprivation is normally known to decrease the phospholipid content consistent with a mobilization of the phosphate reserve, and conversely to increase non‐phosphorous membrane lipids such as digalactosyldiacylglycerol. We report here that unexpectedly, at an early stage of phosphate starvation, phosphatidylcholine (PC) increases transiently. We also show that a significant pool of diacylglycerol (DAG) with the same fatty acid composition as that of PC is present and moreover increases in response to phosphate deprivation. The evolution of the molecular profile of the newly synthesized galactolipids is compatible with a utilization of DAG accumulating from PC hydrolysis, achieved after selection of their acyl molecular species by the galactolipid synthesizing enzymes.