SlJMJ7 orchestrates tomato fruit ripening via crosstalk between H3K4me3 and DML2‐mediated DNA demethylation

• DOI: 10.1111/nph.17838
• Publication Date: 2021-11-03T05:57:31Z
• Authors: Xiaochun Ding; Xuncheng Liu; Guoxiang Jiang; Zhiwei Li; Yunbo Song; Dandan Zhang; Yueming Jiang; Xuewu Duan
• Keywords: Demethylation; H3K4me3; DNA demethylation; Crosstalk

Summary The ripening of fleshy fruits is a unique developmental process that Arabidopsis and rice lack. This driven by hormones transcription factors. However, the critical early regulators fruit are still poorly understood. Here, we revealed SlJMJ7, an H3K4 demethylase, negative regulator in tomato. Combined genome‐wide transcription, binding sites, histone H3K4me3 DNA methylation analyses demonstrated SlJMJ7 regulates key group ripening‐related genes, including ethylene biosynthesis ( ACS2 , ACS4 ACO6 ), transcriptional regulation RIN NOR ) demethylation DML2 demethylation. Moreover, loss function leads to increased levels, which directly activates global DML2‐mediated hypomethylation fruit, indirectly prompts expression genes. Together, these effects lead accelerated sljmj7 mutant. Our findings demonstrate acts as master not only through direct removal from multiple factors, but also crosstalk between These reveal novel regulate gene plant processes.