Submergence induced changes of molecular species in membrane lipids in Arabidopsis thaliana

Plant Diversity
Mulan WangWeiqi Li

Abstract

The composition of membrane lipids is sensitive to environmental stresses. Submergence is a type of stress often encountered by plants. However, how the molecular species of membrane lipids respond to submergence has not yet been characterised. In this study, we used a lipidomic approach to profile the molecular species of membrane lipids in whole plants of Arabidopsis thaliana that were completely submerged for three days. The plants survived one day of submergence, after which, we found that the total membrane lipids were only subtly decreased, showing significant decreases of monogalactosyldiacylglycerol (MGDG) and phosphatidylcholine (PC) and an increase of phosphatidic acid (PA); however, the basic lipid composition was retained. In contrast, three days of submergence caused plants to die, and the membranes deteriorated via the rapid loss of 96% of lipid content together with a 229% increase in PA. The turnover of molecular species from PG and MGDG to PA indicated that submergence-induced lipid changes occurred through PA-mediated degradation. In addition, molecular species of extraplastidic PG degraded sooner than plastidic ones, lyso-phospholipids exhibited various patterns of change, and the double-bond index (DBI) rema...Continue Reading

Citations

May 29, 2020·Plant Signaling & Behavior·Le XuWenying Zhang
Dec 10, 2019·Functional Plant Biology : FPB·Le XuWenying Zhang
Nov 15, 2020·Progress in Lipid Research·Li-Juan XieShi Xiao
Mar 13, 2019·Trends in Plant Science·Elaine YeungRashmi Sasidharan

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