Transcription factor DgMYB recruits H3K4me3 methylase to DgPEROXIDASE to enhance chrysanthemum cold tolerance

• DOI: 10.1093/plphys/kiad479
• Publication Date: 2023-08-30T19:05:25Z
• Authors: Yunchen Luo; Yongyan Wang; Xin Li; Xiaohan Yang; Huiru Bai; Xiaoqin Liao; Xuanling Luo; Fan Zhang; Lei Zhang; Qinglin Liu
• Keywords: H3K4me3; MYB; Wild type; Cold tolerance; Chrysanthemum morifolium

Abstract Cold affects the growth and development of plants. MYB transcription factors histone H3K4me3 transferase ARABIDOPSIS TRITHORAXs (ATXs) play important regulatory functions in process plant resistance to low-temperature stress. In this study, DgMYB expression was responsive low temperature, overexpression led increased tolerance, whereas dgmyb mutant resulted decreased tolerance Chrysanthemum morifolium (Dendranthema grandiflorum var. Jinba) cold stresses. Interestingly, we found that only peroxidase (POD) activity differed substantially between wild type (WT), lines, line. A DgATX methylase interacts with isolated by further experiments. also temperature. Overexpression dgatx chrysanthemum Moreover, dgmyb, dgatx, double mutants all reduced levels at DgPOD, thus reducing DgPOD expression. Together, our results show DgATX, allowing specifically target altering levels, increasing expression, thereby accumulation reactive oxygen species (ROS) chrysanthemum.