拟南芥
生物
拟南芥
酰基转移酶
突变体
生物化学
生物合成
磷脂酰胆碱
子叶
二酰甘油激酶
细胞生物学
酶
植物
磷脂
基因
蛋白激酶C
膜
作者
Liping Wang,Qiang Li,Qun Xia,Wenyun Shen,Gopalan Selvaraj,Jitao Zou
出处
期刊:Lipids
[Wiley]
日期:2020-02-27
卷期号:55 (5): 457-467
被引量:3
摘要
Abstract Studies on the model plant Arabidopsis thaliana have uncovered the identities of most enzymatic components involved in seed storage lipid biosynthesis. However, much remains to be learned on how pathway interactions operate in the seed metabolic network. In this study, we dissected seed glycerolipid molecular compositional changes in the Arabidopsis mutant deficient in diacylglycerol acyltransferase 1 (DGAT1). Our results indicate that metabolic adjustments occurred in both phosphatidylcholine synthesis and deacylation in developing seeds. Ultrastructural changes of perturbed oil and protein bodies were also evident in cotyledon parenchyma cells. To unmask the physiological and developmental role associated with DGAT1‐mediated neutral lipid biosynthesis, we attempted to combine dgat1 mutation with lpcat2 that harbors a defect in lysophosphatidylcholine acyltransferase 2 (LPCAT2). Disruption in both DGAT1 and LPCAT2 led to an apparent defect in pollen development that manifested as pollen sterility. Collectively, our results highlight a role of DGAT1 in both storage lipid synthesis and plant development.
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