期刊
PLANT BIOLOGY
卷 22, 期 6, 页码 1030-1040出版社
WILEY
DOI: 10.1111/plb.13163
关键词
1-methylcyclopropene; AsES; ethylene; immune response; strawberry
资金
- Universidad Nacional de Tucuman [PIUNT 26/D642]
- Agencia Nacional de Promocion Cientifica y Tecnologica [PICT 2017-0653]
- CONICET [PUE-2016-0104]
Acremonium strictumElicitor Subtilisin (AsES) is a fungal elicitor that activates innate immunity, conferring disease resistance in strawberry (Fragaria x ananassaDuch.),Arabidopsisand other plant species. The aim of the present work was to evaluate the involvement of the ethylene (ET) signalling pathway in AsES-mediated immune response in strawberry. Ethylene production and expression of the genes responsible for ET synthesis, perception and response were measured after AsES treatment. ROS (H2O2) accumulation and immunity induced by AsES were studied after ET perception was blocked by 1-methylcyclopropene (1-MCP). Biochemical and molecular results showed that AsES induced a marked increase in local and systemic biosynthesis of ET, both in a biphasic manner. Blocking of ET perception by 1-MCP prior to AsES induction reduced production of ROS (H2O2) and prevented AsES from eliciting defence against fungal pathogens having different lifestyles, such asBotrytis cinerea(necrotrophic) andColletotrichum acutatum(hemibiotrophic). These findings contribute to elucidate the mode of action of the novel elicitor subtilase, AsES, specifically regarding the role of ET signalling in the activation of plant innate immunity, in addition to the multitude of processes regulated by ET in plants.
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