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题名: Requirement of ABA signalling-mediated stomatal closure for resistance of wild tobacco to Alternaria alternata
作者: Sun, H.1; Hu, X.2; Ma, J.3; Hettenhausen, C.1; Wang, L.1; Sun, G.1; Wu, J.1; Wu, J.1
刊名: PLANT PATHOLOGY
关键词: ABA ; Alternaria alternata ; mitogen-activated protein kinase 4 (NaMPK4) ; Nicotiana attenuata ; stomata
英文摘要: Abscisic acid (ABA) is important for mediating abiotic stress responses and also in plant immunity. Its involvement in the resistance of wild tobacco Nicotiana attenuata to the pathogenic fungus Alternaria alternata, tobacco pathotype, was investigated. After infection, many fungal hyphae were observed to enter leaf tissue through stomata within 24h, and necrotic lesions were formed after 3-6days. Importantly, source-sink transition leaves (leaf 0) were more resistant than all fully expanded ones, and this was correlated with more ABA and ABA-related gene transcripts and lower stomatal conductance in leaf 0 after infection. When supplied with ABA or incubated in the dark for 1day, fully expanded leaves, which accumulated less ABA and showed higher stomatal conductance after infection in comparison to leaf 0, showed increased resistance. Mitogen-activated protein kinase 4-silenced plants, in which ABA-induced stomatal closure responses and resistance to A.alternata were highly impaired, did not show stomatal conductance change after infection, and leaf 0 and fully expanded leaves all developed bigger lesions than in wildtype plants. Thus the ABA signalling pathway mediated by NaMPK4 is required for the resistance of N.attenuata to A.alternata, at least in part through the stomatal closure responses.
出版日期: 2014-10-01
卷号: 63, 期号:5, 页码:1070-1077
DOI标识: 10.1111/ppa.12181
语种: 英语
收录类别: SCI
学科分类: Agriculture ; Plant Sciences
ISSN号: 0032-0862
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/18366
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming 650201, Peoples R China
2.Northwest A&F Univ, Coll Life Sci, Yangling 712100, Shaanxi, Peoples R China
3.Yunnan Acad Tobacco Agr Sci, Kunming 650031, Peoples R China

Recommended Citation:
Sun,H.;Hu,X.;Ma,J.;Hettenhausen,C.;Wang,L.;Sun,G.;Wu,J.;Wu,J..Requirement of ABA signalling-mediated stomatal closure for resistance of wild tobacco to Alternaria alternata,PLANT PATHOLOGY,2014,63(5):1070-1077
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