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Stem lodging Resistance-1 controls stem strength by positively regulating the biosynthesis of cell wall components in Capsicum annuum L.

文献类型： 外文期刊

作者： Li, Qing 1 ; Fu, Canfang 1 ; Yang, Bozhi 1 ; Yu, Huiyang 1 ; He, Huan 1 ; Xu, Qing 1 ; Miao, Wu 4 ; Liu, Rongyun 4 ; Chen, Wenchao 5 ; Zhang, Zhuqing 5 ; Zou, Xuexiao 1 ; Hu, Bowen 1 ; Ou, Lijun 1 ;

作者机构： 1.Hunan Agr Univ, Coll Hort, Engn Res Ctr Educ, Minist Germplasm Innovat & Breeding New Variet Hor, Changsha 410125, Peoples R China

2.Yuelushan Lab, Changsha 410128, Peoples R China

3.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Shenzhen Branch, Guangdong Lab Lingnan Modern Agr,Key Lab Synthet B, Shenzhen 518120, Peoples R China

4.Hunan Xiangyan Seed Ind Co Ltd, Changsha 410100, Peoples R China

5.Hunan Acad Agr Sci, Vegetable Res Inst, Changsha 410125, Peoples R China

期刊名称：HORTICULTURE RESEARCH （ 影响因子：7.6； 五年影响因子：8.2 ）

ISSN： 2662-6810

年卷期： 2024 年 11 卷 8 期

页码：

收录情况： SCI

摘要： Lodging presents a significant challenge in cultivating high-yield crops with extensive above-ground biomass, yet the molecular mechanisms underlying this phenomenon in the Solanaceae family remain largely unexplored. In this study, we identified a gene, CaSLR1 (Capsicum annuum Stem Lodging Resistance 1), which encodes a MYELOBLASTOSIS (MYB) family transcription factor, from a lodging-affected C. annuum EMS mutant. The suppression of CaSLR1 expression in pepper led to notable stem lodging, reduced thickness of the secondary cell wall, and decreased stem strength. A similar phenotype was observed in tomato with the knockdown of SlMYB61, the orthologous gene to CaSLR1. Further investigations demonstrated that CaNAC6, a gene involved in secondary cell wall (SCW) formation, is co-expressed with CaSLR1 and acts as a positive regulator of its expression, as confirmed through yeast one-hybrid, dual-luciferase reporter assays, and electrophoretic mobility shift assays. These findings elucidate the CaNAC6-CaSLR1 module that contributes to lodging resistance, emphasizing the critical role of CaSLR1 in the lodging resistance regulatory network.

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