文献类型： 外文期刊
作者： Wang, Xiaodong 1 ; Yu, Jun 1 ; Cai, Ying 1 ; Tang, Min 1 ; Zhang, Liang 1 ; Chen, Feng 2 ; Liu, Jinglin 1 ; Liu, Hongfang 1 ; Terzaghi, William 3 ; Hua, Wei 1 ; Zhang, Jiefu 2 ; Zheng, Ming 1 ;
作者机构： 1.Chinese Acad Agr Sci, Key Lab Biol & Genet Improvement Oil Crops, Minist Agr & Rural Affairs, Oil Crops Res Inst, Wuhan 430062, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Ind Crops, Key Lab Cotton & Rapeseed, Minist Agr & Rural Affairs, Nanjing 210014, Peoples R China
3.Wilkes Univ, Dept Biol, Wilkes Barre, PA 18766 USA
关键词：
期刊名称：PLANT JOURNAL （ 影响因子：5.7； 五年影响因子：7.0 ）
ISSN： 0960-7412
年卷期： 2025 年 123 卷 3 期
页码：
收录情况： SCI
摘要： Brassinosteroids (BRs) play a key role in regulating plant height and leaf angle in plants. However, the mechanism underlying the BR signaling pathway involved in branch angle regulation is poorly understood. Here, we isolated a rapeseed (Brassica napus L.) mutant named dwarf and compact architecture 1 (dca1), which is controlled by a single semi-dominant locus. Map-based cloning revealed that this gain-of-function gene encodes a GSK3/SHAGGY-like kinase (BnaGSK3/DCA1). We demonstrated that BnaIDD16.A09 is a substrate phosphorylated by BnaGSK3/DCA1 and negatively controls branch angles by activating auxin biosynthesis in response to gravitropism. Further, we identified two elite haplotypes from natural germplasm with large variations in the BnaGSK3/DCA1 promoter that exhibited smaller branch angles and slightly shorter height, which have significant potential for improvement of rapeseed plant architecture. Our findings reveal a regulatory mechanism that the BnaGSK3-BnaIDD16 module integrates BR signaling to modulate auxin biosynthesis, thereby controlling branch bending in B. napus.
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