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The transcription factor GmFULc regulates soybean plant height by binding the promoter of a gibberellin-responsive gene

文献类型： 外文期刊

作者： Sun, Jingzhe 1 ; Zhang, Xiaoming 1 ; Feng, Junhang 1 ; Ma, Xiaofei 1 ; Ji, Yujia 1 ; Chen, Shujun 1 ; Li, Jihui 1 ; Li, Dongmei 1 ; Wang, Xiujun 3 ; Zhao, Lin 1 ;

作者机构： 1.Northeast Agr Univ, Key Lab Soybean Biol, Minist Educ China, Harbin 150030, Peoples R China

2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China

3.Heilongjiang Acad Agr Sci, Crop Resources Inst, Harbin 150086, Peoples R China

期刊名称：PLANT PHYSIOLOGY （ 影响因子：6.9； 五年影响因子：7.7 ）

ISSN： 0032-0889

年卷期： 2025 年 197 卷 2 期

页码：

收录情况： SCI

摘要： Plant height is a crucial agronomic characteristic that substantially influences soybean [Glycine max (L.) Merr.] yield. FRUITFULLc (GmFULc) is a MADS-box transcription factor that acts as a growth promoter in soybean; however, the mechanism by which GmFULc regulates soybean height is unknown. This study revealed that GmFULc:GmFULc (the expression of the GmFULc gene driven by its native promoter) soybeans exhibit increased plant height and longer internodes. Conversely, soybean plants containing fulc mutations showed reduced plant height and shortened internodes. Chromatin immunoprecipitation-qPCR revealed GmFULc promotes the expression of gibberellic acid-stimulated Arabidopsis 14 (GmGASA14) and GmGASA32 by directly binding to G-boxes in their promoter regions, leading to notably increased expression of GmGASA14 and GmGASA32 in GmFULc:GmFULc soybean plants and reduced expression in soybean plants containing the fulc-2 mutation. The GmFULc-mediated enhanced expression of GmGASA14 and GmGASA32 increased the gibberellin signal, which may have inhibited gibberellin synthesis by increasing gibberellin 2-oxidase (GmGA2ox) expression and decreasing GA20ox expression. Our findings suggest that GmFULc promoted the expression of GmGASA genes by directly binding to G-boxes in their promoters to regulate soybean plant height. A MADS-box transcription factor directly binds the promoter of a gibberellin-related gene involved in stem growth to regulate soybean plant height.

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