Lipidomic profiling of the developing kernel clarifies the lipid metabolism of Paeonia ostii

Author:

Yu Shui-Yan,Zhang Ying,Lyu Yu-Ping,Yao Zu-Jie,Hu Yong-Hong

Abstract

AbstractLipid components in the developing kernel of Paeonia ostii were determined, and the fatty acid (FA) distributions in triacylglycerol and phospholipids were characterized. The lipids in the kernel were mainly phospholipids (43%), neutral glycerides (24%), fatty acyls (26%), and sphingolipids (4.5%). The dominant neutral glycerides were TAG and diacylglycerol. The PL components included phosphatidic acid, phosphatidyl glycerol, phosphatidyl choline, phosphatidyl serine, phosphatidyl inositol, and phosphatidyl ethanolamine. As the kernel developed, the profiles of the molecular species comprising TAG and PL changed, especially during the earlier phases of oil accumulation. During rapid oil accumulation, the abundances of sphingosine-1-phosphate, pyruvic acid, stearic acid, and alpha-linolenic acid changed significantly; the sphingolipid metabolism and unsaturated FAs biosynthesis pathways were significantly enriched in these differentially abundant metabolites. Our results improve our understanding of lipid accumulation in tree peony seeds, and provide a framework for the analysis of lipid metabolisms in other oil crops.

Funder

Chenshan Key Scientific Research Projects of Shanghai Municipal Administration of Landscaping and City Appearance

Science and Technology Service Network Plan of Chinese Academy of Sciences

Publisher

Springer Science and Business Media LLC

Subject

Multidisciplinary

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