Win by Quantity: a StrikingRickettsia-Bias Symbiont Community Revealed by Seasonal Tracking in the WhiteflyBemisia tabaci

文献类型： 外文期刊

第一作者： Zhao, Dongxiao

作者： Zhao, Dongxiao;Zhang, Zhichun;Niu, Hongtao;Guo, Huifang

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关键词： Symbiont; Coinfection; Season; Bemisia tabaci

期刊名称：MICROBIAL ECOLOGY （ 影响因子：4.552； 五年影响因子：4.77 ）

ISSN： 0095-3628

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收录情况： SCI

摘要： Maintaining an adaptive seasonality is a basic ecological requisite for cold-blooded organism insects which usually harbor various symbionts. However, how coexisting symbionts coordinate in insects during seasonal progress is still unknown. The whiteflyBemisia tabaciin China harbors the obligate symbiontPortierathat infects each individual, as well as various facultative symbionts. In this study, we investigated whitefly populations in cucumber and cotton fields from May to December 2019, aiming to reveal the fluctuations of symbiont infection frequencies, symbiont coordination in multiple infected individuals, and host plants effects on symbiont infections. The results indicated that the facultative symbiontsHamiltonella(H),Rickettsia(R), andCardinium(C) exist in field whiteflies, with single (H) and double (HC and HR) infections occurring frequently. Infection frequencies ofHamiltonella(always 100%) andCardinium(29.50-34.38%) remained steady during seasonal progression.Rickettsiainfection frequency in the cucumber whitefly population decreased from 64.47% in summer to 35.29% in winter. Significantly lowerRickettsiainfection frequency (15.55%) was identified in cotton whitefly populations and was not subject to seasonal fluctuation. Nevertheless,Rickettsiahad a significantly quantitative advantage in the symbiont community of whitefly individuals and populations from both cucumber and cotton field all through the seasons. Moreover, higherPortieraandHamiltonelladensities were found in HC and HR whitefly than in H whitefly, suggesting these symbionts may contribute to producing nutrients for their symbiont partners. These results provide ample cues to further explore the interactions between coexisting symbionts, the coevolutionary relationship between symbionts and host symbiont-induced effects on host plant use.

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