Quantitative profiling of polar glycerolipid species from organs of wild-type Arabidopsis and a PHOSPHOLIPASE Dα1 knockout mutant

被引:225
作者
Devaiah, Shivakumar Pattada
Roth, Mary R.
Baughman, Ethan
Li, Maoyin
Tamura, Pamela
Jeannotte, Richard
Welti, Ruth
Wang, Xuemin
机构
[1] Kansas State Univ, Dept Biochem, Manhattan, KS 66506 USA
[2] Kansas State Univ, Div Biol, Manhattan, KS 66506 USA
关键词
Arabidopsis thaliana; Cruciferae; electrospray ionization tandem mass spectrometry; galactolipid species; membrane lipids; lipid profiling; phospholipid species; phospholipase D; phospholipase A; phosphatidic acid; lipidomics;
D O I
10.1016/j.phytochem.2006.06.005
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Lipid profiling is a targeted metabolomics platform that provides a comprehensive analysis of lipid species with high sensitivity. Profiling based on electrospray ionization tandem mass spectrometry (ESI-MS/MS) provides quantitative data and is adaptable to high throughput analyses. Here we report the profiling of 140 apparent molecular species of polar glycerolipids in Arabidopsis leaves, flower stalks, flowers, siliques, roots, and seeds. Considerable differences in lipid species occur among these organs, providing insights into the different lipid metabolic activities in a specific organ. In addition, comparative profiling between wild-type and a knockout mutant pld alpha 1 (locus ID: AT3G15730) provides insight into the metabolic function of phospholipase D (PLD) in different organs. PLD alpha 1 contributes significantly to phosphatidic acid (PA) levels in roots, seeds, flowers, and flower stalks, but little to basal PA levels in siliques and leaves. In seeds of the pld alpha 1 mutant plants, levels of PA, lysophosphatidylcholine, and lysophosphatidylethanolamine were significantly lower than those of wild-type seeds, suggesting a role for PLD alpha 1 in membrane lipid degradation in seeds. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1907 / 1924
页数:18
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