CsPAT1, a GRAS transcription factor, promotes lignin accumulation by antagonistic interacting with CsWRKY13 in tea plants

• DOI: 10.1111/tpj.16670
• Publication Date: 2024-02-07T06:26:39Z
• Authors: Jing‐Wen Li; Ping Zhou; Zhi‐Hang Hu; Rui‐Min Teng; Yong‐Xin Wang; Tong Li; Ai‐Sheng Xiong; Xing‐Hui Li; Xuan Chen; Jing Zhuang
• Keywords: 0301 basic medicine; 03 medical and health sciences; Gene Expression Regulation, Plant; Arabidopsis; Plants, Genetically Modified; Promoter Regions, Genetic; Lignin; Camellia sinensis; Transcription Factors; Plant Proteins

SUMMARY Lignin is an important component of plant cell walls and plays crucial roles in the essential agronomic traits tea quality tenderness. However, molecular mechanisms underlying regulation lignin biosynthesis plants remain unclear. CsWRKY13 acts as a negative regulator plants. In this study, we identified GRAS transcription factor, phytochrome A signal transduction 1 (CsPAT1), that interacts with CsWRKY13. Silencing CsPAT1 expression heterologous overexpression Arabidopsis demonstrated positively regulates accumulation. Further investigation revealed directly binds to promoters CsPAL CsC4H suppresses . indirectly affects promoter activities by interacting CsWRKY13, thereby facilitating Compared alone, co‐expression Oryza sativa significantly increased biosynthesis. Conversely, compared O. reduced These results antagonistic pathway findings improve our understanding provide insights into role factor family