Epibrassinolide Regulates Lhcb5 Expression Though the Transcription Factor of MYBR17 in Maize
文献类型： 外文期刊
作者： Li, Hui 1 ; He, Xuewu 2 ; Lv, Huayang 2 ; Zhang, Hongyu 2 ; Peng, Fuhai 2 ; Song, Jun 1 ; Liu, Wenjuan 1 ; Zhang, Junjie 2 ;
作者机构： 1.Sichuan Acad Agr Sci, Inst Qual Stand & Testing Technol Res, Chengdu 611130, Peoples R China
2.Sichuan Agr Univ, Coll Life Sci, Yaan 625000, Peoples R China
关键词：
photosynthesis; antenna proteins; MYBR17;
期刊名称：BIOMOLECULES （ 影响因子：4.8； 五年影响因子：5.6 ）
ISSN：
年卷期： 2025 年 15 卷 1 期
页码：
收录情况： SCI
摘要： Photosynthesis, which is the foundation of crop growth and development, is accompanied by complex transcriptional regulatory mechanisms. Research has established that brassinosteroids (BRs) play a role in regulating plant photosynthesis, with the majority of research focusing on the physiological level and regulation of rate-limiting enzymes in the dark reactions of photosynthesis. However, studies on their effects on maize photosynthesis, specifically on light-harvesting antenna proteins, have yet to be conducted. The peripheral light-harvesting antenna protein Lhcb5 is crucial for capturing and dissipating light energy. Herein, by analyzing the transcriptomic data of maize seedling leaves treated with 24-epibrassinolide (EBR) and verifying them using qPCR experiments, we found that the MYBR17 transcription factor may regulate the expression of the photosynthetic light-harvesting antenna protein gene. Further experiments using protoplast transient expression and yeast one-hybrid tests showed that the maize transcription factor MYBR17 responds to EBR signals and binds to the promoter of the light-harvesting antenna protein Lhcb5, thereby upregulating its expression. These results were validated using an Arabidopsis mybr17 mutant. Our results offer a theoretical foundation for the application of BRs to enhance the photosynthetic efficiency of maize.
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