Herbivore defense responses and associated herbivore defense mechanism as revealed by comparing a resistant wild soybean with a susceptible cultivar

文献类型： 外文期刊

第一作者： Wang, Xiaoyi

作者： Wang, Xiaoyi;Chen, Haifeng;Shan, Zhihui;Hao, Qingnan;Zhang, Chanjuan;Yang, Zhonglu;Zhang, Xiaojuan;Yuan, Songli;Qiu, Dezhen;Chen, Shuilian;Jiao, Yongqin;Zhou, Xin'an;Wang, Xiaoyi

作者机构：

关键词： Soybean;H. armigera;Morphology Gene expression level polymorphism (ELP);Detoxification and toxin-tolerance gene

期刊名称：CROP JOURNAL （ 影响因子：4.407； 五年影响因子：5.687 ）

ISSN： 2095-5421

年卷期： 2015 年 3 卷 6 期

页码：

收录情况： SCI

摘要： Plants have evolved sophisticated defense mechanisms against herbivores to help them adapt to the environment. Understanding the defense mechanisms in plants can help us control insects in a more effective manner. In this study, we found that compared with Tianlong 2 (a cultivated soybean with insect susceptibility), ED059 (a wild soybean line with insect resistance) contains sharper pubescence tips, as well as lower transcript levels of wound-induced protein kinase (WIPK) and salicylic acid-induced protein kinase (SIPK), which are important mitogen-activated protein kinases involved in early defense response to herbivores. The observed lower transcript levels of WIPK and SIPK induced higher levels of jasmonic acid (JA), JA biosynthesis enzymes (AOC3) and some secondary metabolites in ED059. Functional analysis of the KTI1 gene via Agrobacterium-mediated transformation in Arabidopsis thaliana indicated that it plays an important role in herbivore defense in ED059. We further investigated the molecular response of third-instar Helicoverpa armigera (Hubner) larvae to Tianlong 2 and ED059. We found apoptotic cells only in the midguts of larvae that fed on ED059. Compared with larvae reared on the susceptible cultivar Tianlong 2, transcript levels of catalase (CAT) and glutathione S-transferase (GST) were up-regulated, whereas those of CAR, CHSB, and TRY were down-regulated in larvae that fed on the highly resistant variety ED059. We propose that these differences underlie the different herbivore defense responses of ED059 and Tianlong 2. (C) 2015 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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