Odor, Not Performance, Dictates Bemisia tabaci's Selection between Healthy and Virus Infected Plants

文献类型： 外文期刊

第一作者： Chen, Gong

作者： Chen, Gong;Zheng, Huixin;Chen, Gong;Shi, Xiaobin;Liu, Xin;Peng, Zhengke;Zheng, Huixin;Xie, Wen;Xu, Baoyun;Wang, Shaoli;Wu, Qingjun;Zhang, Youjun;Su, Qi;Zhou, Xuguo

作者机构：

关键词： mother-knows-best;plant virus;volatiles;performance;host preference;non-vector insects

期刊名称：FRONTIERS IN PHYSIOLOGY （ 影响因子：4.566； 五年影响因子：4.804 ）

ISSN： 1664-042X

年卷期： 2017 年 8 卷

页码：

收录情况： SCI

摘要： Although, insect herbivores are generally thought to select hosts that favor the fitness of their progeny, this "mother-knows-best" hypothesis may be challenged by the presence of a plant virus. Our previous study showed that the whitefly, Bemisia tabaci, the obligate vector for transmitting Tomato yellow leaf curl virus (TYLCV), preferred to settle and oviposit on TYLCV-infected rather than healthy host plant, Datura strarnonium. The performances of B. tabaci larvae and adults were indeed improved on virus-infected D. stramoniurn, which is consistent with "mother-knows-best" hypothesis. In this study, B. tabaci Q displayed the same preference to settle and oviposit on Tomato spotted wilt virus (TSVVV)-infectedhost plants, D. stramoniurn and Capsicum annuum, respectively. As a non-vector of TSWV, however, insect performance was impaired since adult body size, longevity, survival, and fecundity were reduced in TSVVV infected D. stramonium. This appears to be an odor-mediated behavior, as plant volatile profiles are modified by viral infection. Infected plants have reduced quantities of o-xylene and alpha-pinene, and increased levels of phenol and 2 -ethyl-1-hexanol in their headspace. Subsequent behavior experiments showed that o-xylene and alpha-pinene are repellant, while phenol and 2-ethyl-1-hexanol are attractive. This indicates that the preference of B. tabaci for virus-infected plants is modulated by the dynamic changes in the volatile profiles rather than the subsequent performances on virus-infected plants.

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