Soybean (Glycine max) WRINKLED1 transcription factor, GmWRI1a, positively regulates seed oil accumulation
文献类型： 外文期刊
作者： Chen, Liang 1 ; Zheng, Yuhong 2 ; Dong, Zhimin 1 ; Meng, Fanfan 1 ; Sun, Xingmiao 1 ; Fan, Xuhong 1 ; Zhang, Yunfeng 1 ;
作者机构： 1.Jilin Acad Agr Sci, Natl Engn Res Ctr Soybean, Soybean Res Inst, Changchun 130033, Jilin, Peoples R China
2.Northeast Agr Univ, Key Lab Soybean Biol, Chinese Minist Educ, Harbin 150030, Heilongjiang, Peoples R China
关键词： Soybean (Glycine max); Seed oil; WRI1; AP2/EREBP transcription factor; Fatty acid biosynthesis; Transcriptional machinery
期刊名称：MOLECULAR GENETICS AND GENOMICS （ 影响因子：3.291； 五年影响因子：3.257 ）
ISSN： 1617-4615
年卷期： 2018 年 293 卷 2 期
页码：
收录情况： SCI
摘要： Soybean is the world's most important leguminous crop producing high-quality protein and oil. Elevating oil accumulation in soybean seed is always many researchers' goal. WRINKLED1 (WRI1) encodes a transcription factor of the APETALA2/ethylene responsive element-binding protein (AP2/EREBP) family that plays important roles during plant seed oil accumulation. In this study, we isolated and characterized three distinct orthologues of WRI1 in soybean (Glycine max) that display different organ-specific expression patterns, among which GmWRI1a was highly expressed in maturing soybean seed. Electrophoretic mobility shift assays and yeast one-hybrid experiments demonstrated that the GmWRI1a protein was capable of binding to AW-box, a conserved sequence in the proximal upstream regions of many genes involved in various steps of oil biosynthesis. Transgenic soybean seeds overexpressing GmWRI1a under the control of the seed-specific napin promoter showed the increased total oil and fatty acid content and the changed fatty acid composition. Furthermore, basing on the activated expressions in transgenic soybean seeds and existence of AW-box element in the promoter regions, direct downstream genes of GmWRI1a were identified, and their products were responsible for fatty acid production, elongation, desaturation and export from plastid. We conclude that GmWRI1a transcription factor can positively regulate oil accumulation in soybean seed by a complex gene expression network related to fatty acid biosynthesis.
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