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Abstract

Lipids are the structural constituents of cell membranes and play crucial roles in plant adaptation to abiotic stresses. The aim of this study was to use glycerolipidomic and transcriptomic to analyze the changes in lipids metabolism induced by cadmium (Cd) exposure in wheat. The results indicated that Cd stress did not decrease the concentrations of monogalactosyldiacyglycerol (MGDG), phosphatidylcholine (PC), lysophosphatidylcholine (LPC) and phosphatidic acid at 6 h, but decreased digalactosyldoacylglycerol (DGDG), MGDG, PC, phosphatidylethanolamine (PE), phosphatidylglycerol (PG), phosphatidylserine (PS) and LPC concentrations in wheat root at 24 h. Although the concentrations of highly abundant glycerolipids PC and PE were decreased, the ratios of PC/PE increased thus contributing to wheat adaptation to Cd stress. Cd did not reduce the extent of total lipid unsaturation due to the unchanged concentrations of high abundance species of C36:4, C34:2, C34:3 and C36:6 at 6 h, indicative of their roles in resisting Cd stress. The correlation analysis revealed the glycerolipids species experiencing co-metabolism under Cd stress, which is driven by the activated expression of genes related to glycerolipid metabolism, desaturation and oxylipin synthesis. This study gives insights into the changes of glycerolipids induced by Cd and the roles in wheat adaptation to Cd stress.

Item Type:	Article
Authors/Creators:	Wu, S and Hu, C and Wang, X and Wang, Y and Yu, M and Xiao, H and Shabala, S and Wu, K and Tan, Q and Xu, S and Sun, X
Keywords:	glycerolipidomic, transcriptomic, lipid, cadmium, lipid unsaturation, high abundance glycerolipid species, ratio of phosphatidylcholine/phosphatidylethanolamine, lipid co-occurrence, lipoidase
Journal or Publication Title:	Journal of Hazardous Materials
Publisher:	Elsevier Science Bv
ISSN:	0304-3894
DOI / ID Number:	https://doi.org/10.1016/j.jhazmat.2021.127115
Copyright Information:	© 2021 Elsevier B.V. All rights reserved.
Related URLs:	Google Scholar: Shabala, S UTAS Profile: Shabala, S
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