Journal
JOURNAL OF INTEGRATIVE PLANT BIOLOGY
Volume 63, Issue 5, Pages 828-833Publisher
WILEY
DOI: 10.1111/jipb.13075
Keywords
EIN3; ethylene; interaction; NPR1; salicylic acid; senescence; synergistic effect
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Funding
- Natural Science Foundation of Shanghai Funding Source: Medline
- the National Natural Science Foundation of China Funding Source: Medline
- the Municipal Science and Technology Commission of Shanghai Funding Source: Medline
- Shanghai Science and Technology Innovation Action Plan Project Funding Source: Medline
- the Shanghai Pujiang Talent Program Funding Source: Medline
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The phytohormones ethylene and salicylic acid synergistically promote leaf senescence in Arabidopsis by interacting with transcription factors EIN3 and NPR1 to promote the expression of senescence-associated genes. The delayed senescence phenotype in the triple mutant indicates the importance of functional EIN3/EIL1 in NPR1-promoted leaf senescence.
The phytohormones ethylene and salicylic acid (SA) have long been known to promote senescence, but their interplay during this process remains elusive. Here we report the synergistic effects of ethylene and SA on promoting leaf senescence in Arabidopsis. EIN3, a key transcription factor of ethylene signaling, physically interacted with the core SA signaling regulator NPR1 in senescing leaves. EIN3 and NPR1 synergistically promoted the expression of the senescence-associated genes ORE1 and SAG29. The senescence phenotype was more delayed for the ein3eil1npr1 triple mutant than ein3eil1 or npr1 with ethylene or/and SA treatment. NPR1-promoted leaf senescence may depend on functional EIN3/EIL1.
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