期刊
JOURNAL OF CELL SCIENCE
卷 131, 期 2, 页码 -出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jcs.202424
关键词
Copper fungicide; cis-element; Defense response; MAMP-triggered immunity; Phytohormone; Transcript regulation
类别
资金
- Major Application Technology Innovation Project of Shandong Province
- Natural Science Foundation of Shandong Province, China [ZR2014CQ044, ZR2015CM004]
- Funds of Shandong Double Tops Program
- China Postdoctoral Science Foundation [2017M612310]
- Taishan Industrial Experts Programme of Shandong Province [20150621]
Cu2+ ions are required by all living organisms and play important roles in many bactericides and fungicides. We previously reported that Cu2+ can elicit defense responses, which are dependent on the ethylene signaling pathway in Arabidopsis. However, the mechanism by which Cu2+ elicits the biosynthesis of ethylene remains unclear. Here, we show that CuSO4 treatment rapidly increases the production of ethylene. In addition, it upregulates the expression of several defense-related genes and ethylene biosynthesis genes, including genes encoding S-adenosylmethionine synthase, 1-aminocyclopropane-1-carboxylate (ACC) synthase (ACS) and ACC oxidase. Among these genes, Arabidopsis thaliana (At) ACS8 was identified as essential for the defense response and early ethylene biosynthesis induced by Cu2+. Furthermore, Cu2+-induced AtACS8 expression depended on the copper-response cis-element (CuRE) in the promoter of AtACS8. Our study indicates that Cu2+ specifically activates the expression of AtACS8 to promote the early biosynthesis of ethylene that elicits plant immunity in Arabidopsis plants.
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