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The oriental armyworm (Mythimna separata) feeding induces systemic defence responses within and between maize leaves
Malook, Saif ul1,2; Qi, Jinfeng1; Hettenhausen, Christian1; Xu, Yuxing1,2; Zhang, Cuiping1,2; Zhang, Jingxiong1,2; Lu, Chengkai1,2; Li, Jing1; Wang, Lei1; Wu, Jianqiang1
2019-03-04
Source PublicationPHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
ISSN0962-8436
Volume374Issue:1767Pages:12
AbstractMaize (Zea mays) is a staple cereal crop cultivated all over the world but that is threatened by various insects. Feeding of the lepidopteran insect Mythimna separata triggers defence signalling and increases anti-herbivore benzoxazinoids (Bxs) in the insect-damaged maize leaves. However, the herbivory-elicited within-leaf and leaf-to-leaf systemic signalling in maize remains largely unexplored. Here, we show that simulated M. separata herbivory and mechanical wounding elicited increased levels of jasmonic acid (JA), JA-Ile (JA-isoleucine conjugate) and Bxs in the damaged areas and in specific systemic regionswithin a leaf. Importantly, increased contents of Bxs were detected in a systemic leaf, and consistently, this leaf exhibited increased defence against M. separata. Increased JA/JA-Ile and altered transcriptome, including Bx biosynthesis genes, were detected in systemic leaves after wounding or simulated herbivory treatments, although only simulated herbivory induced increase of the contents of Bxs systemically. Promoter and co-expression analysis revealed that transcription factors bHLH57 and WRKY34 may regulate Bx biosynthesis genes in systemic leaves. Moreover, leaf ablation experiment indicated that the systemic signal rapidly exited the local leaves within 30 min after elicitation. This study provides new insight into the temporal and spatial regulation of defence responses of maize against lepidopteran insects. This article is part of the theme issue 'Biotic signalling sheds light on smart pest management'.
Keywordsystemic defence herbivory maize jasmonic acid benzoxazinoids
Indexed BySCI
Language英语
WOS IDWOS:000460484100002
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/64824
Collection资源植物与生物技术所级重点实验室
Corresponding AuthorWu, Jianqiang
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Wild Plant Resources, Dept Econ Plants & Biotechnol, Kunming 650201, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Malook, Saif ul,Qi, Jinfeng,Hettenhausen, Christian,et al. The oriental armyworm (Mythimna separata) feeding induces systemic defence responses within and between maize leaves[J]. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2019,374(1767):12.
APA Malook, Saif ul.,Qi, Jinfeng.,Hettenhausen, Christian.,Xu, Yuxing.,Zhang, Cuiping.,...&Wu, Jianqiang.(2019).The oriental armyworm (Mythimna separata) feeding induces systemic defence responses within and between maize leaves.PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,374(1767),12.
MLA Malook, Saif ul,et al."The oriental armyworm (Mythimna separata) feeding induces systemic defence responses within and between maize leaves".PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 374.1767(2019):12.
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