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Article

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

1
Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China
2
The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
3
Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
4
State Key Laboratory of Molecular Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai 200031, China
5
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
6
College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
7
College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
*
Author to whom correspondence should be addressed.
These authors contributed equally.
Int. J. Mol. Sci. 2021, 22(2), 785; https://doi.org/10.3390/ijms22020785
Submission received: 9 December 2020 / Revised: 2 January 2021 / Accepted: 11 January 2021 / Published: 14 January 2021
(This article belongs to the Section Molecular Plant Sciences)

Abstract

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.
Keywords: glycerol-3-phosphate acyltransferase; oil biosynthesis; plant height; gibberellin metabolism; cell wall glycerol-3-phosphate acyltransferase; oil biosynthesis; plant height; gibberellin metabolism; cell wall

Share and Cite

MDPI and ACS Style

Bai, Y.; Shen, Y.; Zhang, Z.; Jia, Q.; Xu, M.; Zhang, T.; Fang, H.; Yu, X.; Li, L.; Liu, D.; et al. A GPAT1 Mutation in Arabidopsis Enhances Plant Height but Impairs Seed Oil Biosynthesis. Int. J. Mol. Sci. 2021, 22, 785. https://doi.org/10.3390/ijms22020785

AMA Style

Bai Y, Shen Y, Zhang Z, Jia Q, Xu M, Zhang T, Fang H, Yu X, Li L, Liu D, et al. A GPAT1 Mutation in Arabidopsis Enhances Plant Height but Impairs Seed Oil Biosynthesis. International Journal of Molecular Sciences. 2021; 22(2):785. https://doi.org/10.3390/ijms22020785

Chicago/Turabian Style

Bai, Yang, Yue Shen, Zhiqiang Zhang, Qianru Jia, Mengyuan Xu, Ting Zhang, Hailing Fang, Xu Yu, Li Li, Dongmei Liu, and et al. 2021. "A GPAT1 Mutation in Arabidopsis Enhances Plant Height but Impairs Seed Oil Biosynthesis" International Journal of Molecular Sciences 22, no. 2: 785. https://doi.org/10.3390/ijms22020785

APA Style

Bai, Y., Shen, Y., Zhang, Z., Jia, Q., Xu, M., Zhang, T., Fang, H., Yu, X., Li, L., Liu, D., Qi, X., Chen, Z., Wu, S., Zhang, Q., & Liang, C. (2021). A GPAT1 Mutation in Arabidopsis Enhances Plant Height but Impairs Seed Oil Biosynthesis. International Journal of Molecular Sciences, 22(2), 785. https://doi.org/10.3390/ijms22020785

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