Lipids modifications during walnut development: Changes in the composition and metabolic regulation of oil bodies

文献类型： 外文期刊

第一作者： Zhu, Kaiyang

作者： Zhu, Kaiyang;Lu, Zeyu;Ma, Ji;Lei, Hongjie;Xu, Huaide;Li, Mei;Zhang, Ting;Zhao, Wenge

作者机构：

关键词： Walnut; Oil body; Development; Lipidomics; Dynamic changes; Metabolic pathway

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN： 0304-4238

年卷期： 2024 年 338 卷

页码：

收录情况： SCI

摘要： Walnut oil bodies (WOBs), the storage lipid organelles that forms and accumulates with walnut development. However, there is little literature about the lipid compositions and dynamic changes of WOBs during development. To address this gap in knowledge, lipidomics profile and metabolic modulation of WOBs during walnut (wen 185 cultivar) development (60, 74, 88, 102, 116, and 130 days after pollination, S1-S6) were analyzed using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). A total of 305 individual lipids in WOBs were mainly glycerolipids (79.34%), glycerophospholipids (12.13%), and fatty acyls (7.21%). Moreover, triacylglycerols, diacylglycerols, monoglycerides, free fatty acids, phosphatidylglycerols and phosphatidylcholines had high relative content. Notably, triacylglycerols were the most abundant lipids in WOBs at every stage and they were rich in unsaturated fatty acids, especially linoleic acid. With the walnut development, 209 lipids changed significantly between the S1 and S6 stages. The linoleic acid metabolism, glycerophospholipid metabolism and glycerolipid metabolism pathways were significantly enriched. Among the three metabolic pathways, linoleic acid metabolism had the greatest impact on WOBs formation and metabolism. Therefore, regulating linoleic acid metabolism would be one of the strategies to control the formation and metabolism of WOBs. Together, these findings contributed to further understanding of the potential mechanisms of lipid accumulation in WOBs.

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