期刊
PLANT SCIENCE
卷 291, 期 -, 页码 -出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2019.110351
关键词
Apple; MdERF11; Botryosphaeria dothidea; Pathogen resistance; ROS; Salicylic acid
资金
- National Key Research and Development Program of China [2018YFD1000200]
- National Natural Science Foundation of China [31972375]
- Shandong Province [SDAIT-06-03]
- Major Program of Shandong Provincial Natural Science Foundation [ZR2017ZC0328]
Ethylene response factor (ERF) is a plant-specific transcription factor involved in many biological processes including root formation, hypocotyl elongation, fruit ripening, organ senescence and stress responses, as well as fruit quality formation. However, its underlying mechanism in plant pathogen defense against Botryosphaeria dothidea (B. dothidea) remains poorly understood. Here, we isolate MdERF11, an apple nucleus-localized ERF transcription factor, from apple cultivar 'Royal Gala'. qRT-PCR assays show that the expression of MdERF11 is significantly induced in apple fruits after B. dothidea infection. Overexpression of MdERF11 gene in apple calli significantly increases the resistance to B.dothidea infection, while silencing MdERF11 in apple calli results in reduced resistance. Ectopic expression of MdERF11 in Arabidopsis also exhibits enhanced resistance to B. dothidea infection compared to that of wild type. Infections in apple calli and Arabidopsis leaves by B. dothidea respectively cause an increase in endogenous levels of salicylic acid (SA) followed by induction of SA synthesis-related and signaling-related gene expression. Taken together, these findings illustrate a potential mechanism by which MdERF11 elevates plant pathogen defense against B. dothidea by regulating SA synthesis pathway.
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