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题名: Ethylene signalling is essential for the resistance of Nicotiana attenuata against Alternaria alternata and phytoalexin scopoletin biosynthesis
作者: Sun, H.1, 2; Song, N.1; Ma, L.1; Li, J.1, 2; Ma, L.1; Wu, J.1; Wu, J.1
刊名: PLANT PATHOLOGY
关键词: ACO ; EIN2 ; ETR1 ; phytoalexin ; plant resistance ; scopoletin
英文摘要: The phytohormone ethylene plays an important role in plant defence responses to pathogen attack. When infected by the necrotrophic fungal pathogen Alternaria alternata (tobacco pathotype), which causes severe diseases in Nicotiana species, the wild tobacco plant Nicotiana attenuata accumulates a high amount of the jasmonate (JA)-dependent phytoalexin scopoletin to defend itself against this fungal pathogen. However, it is still not known whether ethylene signalling is also involved in scopoletin biosynthesis and the resistance of N. attenuata. After infection, ethylene biosynthetic genes were highly elicited. Furthermore, plants strongly impaired in ethylene biosynthesis or perception had dramatically decreased scopoletin levels, and these plants became more susceptible to the fungus, while A. alternata- elicited JA levels were increased, indicating that the decreased defence responses were not due to lower JA levels. Thus, it is concluded that after infection, ethylene signalling is activated together with JA signalling in N. attenuata plants and this subsequently regulates scopoletin biosynthesis and plant resistance.
出版日期: 2017-02-01
卷号: 66, 期号:2, 页码:277-284
语种: 英语
收录类别: SCI
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/51016
Appears in Collections:中国西南野生生物种质资源库_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Res & Dev Wild Plant Resources, Key Lab Econ Plants & Biotechnol, Kunming 650201, Peoples R China
2.Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Sun, H.,Song, N.,Ma, L.,et al. Ethylene signalling is essential for the resistance of Nicotiana attenuata against Alternaria alternata and phytoalexin scopoletin biosynthesis[J]. PLANT PATHOLOGY,2017,66(2):277-284.
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