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Overexpression of WRINKLED1 improves the weight and oil content in seeds of flax (Linum usitatissimum L.)

文献类型： 外文期刊

作者： Li, Wenjuan 1 ; Wang, Limin 1 ; Qi, Yanni 1 ; Xie, Yaping 1 ; Zhao, Wei 1 ; Dang, Zhao 1 ; Zhang, Jianping 1 ;

作者机构： 1.Gansu Acad Agr Sci, Inst Crop Res, Lanzhou, Peoples R China

关键词： Linum usitatissimum; L; WRINKLED1; oil content; gene expression; seed weight

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）

ISSN： 1664-462X

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Seeds of flax (Linum usitatissimum L.) are highly rich in both oil and linolenic acid (LIN). It is crucial for flax agricultural production to identify positive regulators of fatty acid biosynthesis. In this study, we find that WRINKLED1 transcription factors play important positive roles during flax seed oil accumulation. Two WRINKLED1 genes, LuWRI1a and LuWRI1b, were cloned from flax, and LuWRI1a was found be expressed predominantly in developing seeds during maturation. Overexpression of LuWRI1a increased seed size, weight, and oil content in Arabidopsis and increased seed storage oil content in transgenic flax without affecting seed production or seed oil quality. The rise in oil content in transgenic flax seeds was primarily attributable to the increase in seed weight, according to a correlational analysis. Furthermore, overexpression or interference of LuWRI1a upregulated the expression of genes in the fatty acid biosynthesis pathway and LAFL genes, and the expression level of WRI1 was highly significantly positively associated between L1L, LEC1, and BCCP2. Our findings give a theoretical scientific foundation for the future application of genetic engineering to enhance the oil content of plant seeds.

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