Association of BrERF72 with methyl jasmonate-induced leaf senescence of Chinese flowering cabbage through activating JA biosynthesis-related genes

Abstract

Crop genetics: the secrets of aging in leaves Researchers in China have uncovered a gene involved leaf aging in response to the plant hormone jasmonate in Chinese flowering cabbage. A team led by Jian-ye Chen of the South China Agricultural University treated Chinese flowering cabbage with jasmonate, which is known to promote leaf senescence in other species. In addition to accelerating senescence, the treatment caused the cabbage to produce more jasmonate. The team also used RNA sequencing to discover a new transcription factor, BrERF72, linking jasmonate and leaf senescence. BrERF72 is active during leaf senescence and was more strongly expressed in jasmonate-treated leaves. The team found that BrERF72 activates jasmonate biosynthesis genes, potentially creating a feedback loop reinforcing senescence. These findings extend our understanding of how leaves age, which will help improve breeding, treatment, and storage of leafy crops.