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Salicylic acid and ethylene coordinately promote leaf senescence
Author(s) -
Yu Xiaodong,
Xu Yiren,
Yan Shunping
Publication year - 2021
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/jipb.13074
Subject(s) - senescence , salicylic acid , crosstalk , npr1 , arabidopsis , transcription factor , ethylene , microbiology and biotechnology , regulator , biology , mutant , biochemistry , gene , medicine , heart failure , physics , natriuretic peptide , optics , catalysis
Summary Leaf senescence is an intrinsic biological process of plants. The phytohormones salicylic acid (SA) and ethylene (ET) are known to promote senescence. However, their relationship in this process is still unclear. We found that EIN3 and EIL1, two key transcription factors in ET signaling, are required for SA‐induced leaf senescence in Arabidopsis . Furthermore, ET enhances the effect of SA in promoting senescence. Biochemical studies revealed that NPR1, the master regulator of SA signaling, interacts with EIN3 to promote its transcriptional activity. Our study suggests that SA and ET function coordinately in senescence, which is in contrast to their antagonistic crosstalk in other biological processes.