Genetic regulation of defence responses in cotton to insect herbivores

文献类型： 外文期刊

第一作者： Bo Chu;;Shuai Zhang

作者： Bo Chu;Shuai Zhang;Cui, Jin-Jie;Li Wang;Xiang-Zhen Zhu;Jun-Yu Luo;Chun-Yi Wang;Li-Min L;Jin-Jie Cui

作者机构：

关键词： Cotton;Ghppo1;inducible defences;JA signaling pathway;polyphenol oxidase;SA signaling pathway

期刊名称：AOB PLANTS （ 影响因子：3.276； 五年影响因子：3.496 ）

ISSN： 2041-2851

年卷期： 2017 年 9 卷

页码：

收录情况： SCI

摘要： Induced defences play a key role in plant resistance against herbivores, and mediate interactions between phytophagous arthropods and plants via genes and signal pathways. Here, we examined the interaction between Helicoverpa armigera and cotton and the subsequent regulation of cotton defences. Quantitative realtime PCR data indicated that Ghppo1 expression was up-regulated by infestations of first instar H. armigera larvae and applications of methyl jasmonate (Me-JA). In contrast, neither third instar larvae nor methyl salicylate (Me-SA) increased Ghppo1 expression levels in cotton plants. Additionally, cotton polyphenol oxidase activities were up-regulated by first instar H. armigera larvae and Me-JA, but not by third instar larvae or Me-SA. Expressing the Gossypium hirsutum polyphenol oxidase gene Ghppo1 in transgenic Arabidopsis thaliana plants negatively affected H. armigera development. The expression of key jasmonic acid signaling pathway genes (i. e. GhAOS and GhCOI1) was induced by infestation of first instar H. armigera larvae. Moreover, plants previously treated with first instar H. armigera larvae exhibited significantly increased resistance to third instar H. armigera. Our findings confirm that H. armigera affects cotton defence gene expression levels to induce herbivore resistance. Additionally, Ghppo1 expression is mediated by jasmonic acid, but not salicylic acid, and may be involved in the interaction between insect herbivores and cotton defence responses.

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