Ca2+ signal contributing to jasmonic acid-induced direct and indirect defense against the whitefly Bemisia tabaci in tomato plants

文献类型： 外文期刊

第一作者： Liu, Xin

作者： Liu, Xin;Liu, Yong;Liu, Xin;Xie, Wen;Guo, Zhaojiang;Wu, Qingjun;Wang, Shaoli;Zhang, Youjun;Hussain, Sabir

作者机构：

关键词： calcium ion; exogenous jasmonic acid; parasitism; plant defense; whitefly control; sweet potato whitefly; tobacco whitefly; Hemiptera; Aleyrodidae; underlying mechanism; JA-induced gene expression; Encarsia formosa

期刊名称：ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA （ 影响因子：2.25； 五年影响因子：2.184 ）

ISSN： 0013-8703

年卷期： 2021 年 169 卷 9 期

页码：

收录情况： SCI

摘要： The phytophagous whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) causes serious crop yield losses around the world especially by vectoring viruses. Exogenous jasmonic acid (JA) induces direct plant resistance to B. tabaci, but the underlying mechanism of JA-induced exogenous defenses is not well understood. Here, we demonstrate that exogenous JA not only increases the cytosolic Ca2+ concentration ([Ca2+](cyt)) in tomato mesophyll cells but also induces the expression of Ca2+-sensor genes and plant defense genes. Pre-treatment with Ca2+ inhibitor (ruthenium red) significantly repressed the elevation of [Ca2+](cyt), expression of JA-induced genes, and emission of plant volatiles induced by JA, thus reducing the JA-induced direct (feeding choice and fitness of B. tabaci) and indirect [olfactory choice and parasitism by the parasitoid Encarsia formosa Gahan (Hymenoptera: Aphelinidae)] plant resistance to B. tabaci. These results indicate that the Ca2+ signal induced by JA mediates and directs the plants defenses against whitefly. Present results will not only give us a better understanding of how exogenous JA influences the crop community, but also deliver some clues for the potential application of exogenous JA, as a plant elicitor, in whitefly management.

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