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A GPAT1 Mutation in Arabidopsis Enhances Plant Height but Impairs Seed Oil Biosynthesis

文献类型： 外文期刊

作者： Bai, Yang 1 ; Shen, Yue 3 ; Zhang, Zhiqiang 4 ; Jia, Qianru 5 ; Xu, Mengyuan 6 ; Zhang, Ting 1 ; Fang, Hailing 1 ; Yu, Xu 1 ;

作者机构： 1.Jiangsu Prov & Chinese Acad Sci, Inst Bot, Jiangsu Key Lab Res & Utilizat Plant Resources, Nanjing Bot Garden Mem Sun Yat Sen, Nanjing 210014, Peoples R China

2.Jiangsu Prov Platform Conservat & Utilizat Agr Ge, Nanjing 210014, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Peoples R China

4.Chinese Acad Sci, Shanghai Inst Biochem & Cell Biol, Ctr Excellence Mol Cell Sci, State Key Lab Mol Biol, Shanghai 200031, Peoples R China

5.Nanjing Agr Univ, Coll Life Sci, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China

6.Fujian Agr & Forestry Univ, Coll Hort, Fuzhou 350002, Peoples R China

7.Fujian Agr & Forestry Univ, Coll Life Sci, Fuzhou 350002, Peoples R China

关键词： glycerol-3-phosphate acyltransferase; oil biosynthesis; plant height; gibberellin metabolism; cell wall

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN：

年卷期： 2021 年 22 卷 2 期

页码：

收录情况： SCI

摘要： Glycerol-3-phosphate acyltransferases (GPATs) play an important role in glycerolipid biosynthesis, and are mainly involved in oil production, flower development, and stress response. However, their roles in regulating plant height remain unreported. Here, we report that Arabidopsis GPAT1 is involved in the regulation of plant height. GUS assay and qRT-PCR analysis in Arabidopsis showed that GPAT1 is highly expressed in flowers, siliques, and seeds. A loss of function mutation in GPAT1 was shown to decrease seed yield but increase plant height through enhanced cell length. Transcriptomic and qRT-PCR data revealed that the expression levels of genes related to gibberellin (GA) biosynthesis and signaling, as well as those of cell wall organization and biogenesis, were significantly upregulated. These led to cell length elongation, and thus, an increase in plant height. Together, our data suggest that knockout of GPAT1 impairs glycerolipid metabolism in Arabidopsis, leading to reduced seed yield, but promotes the biosynthesis of GA, which ultimately enhances plant height. This study provides new evidence on the interplay between lipid and hormone metabolism in the regulation of plant height.

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