期刊
NEW PHYTOLOGIST
卷 229, 期 4, 页码 2192-2205出版社
WILEY
DOI: 10.1111/nph.16985
关键词
Arabidopsis; dormancy; ethylene; mitochondrial retrograde signalling; reactive oxygen species(ROS); seed
资金
- National Council for Scientific Research of Lebanon (CNRS-L)
- Agence Universitaire de la Francophonie
- Universite Saint-Joseph de Beyrouth
- Institut de Biologie Paris Seine, Sorbonne Universite, Paris, France [CNRS-FRE3631]
Ethylene regulates seed dormancy release by promoting mitochondrial retrograde response and ROS production, while also requiring activation of the ethylene canonical pathway. This study reveals the interaction between ethylene and ROS homeostasis in seed germination, highlighting the importance of retrograde signaling in this process.
Ethylene and reactive oxygen species (ROS) regulate seed dormancy alleviation, but the molecular basis of their action and crosstalk remains largely unknown. Here we studied the mechanism of Arabidopsis seed dormancy release by ethylene using cell imaging, and genetic and transcriptomics approaches, in order to tackle its possible interaction with ROS homeostasis. We found that the effect of ethylene on seed germination required ROS production by the mitochondrial electron transport chain. Seed response to ethylene involved a mitochondrial retrograde response (MRR) through nuclear ROS production and upregulation of the MRR components AOX1a and ANAC013, but also required the activation of the ethylene canonical pathway. Together our data allowed deciphering of the mode of action of ethylene on seed germination and the associated dynamics of ROS production. Our findings highlight the occurrence of retrograde signalling in seed germination.
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