3 years ago

Incidence of facultative bacterial endosymbionts in spider mites associated with local environment and host plant.

Yue-Ling Song, Jin-Cheng Zhou, Yu-Xi Zhu, Jing-Tao Sun, Xiao-Yue Hong, Yan-Kai Zhang, Ary A Hoffmann
Spider mites are frequently associated with multiple endosymbionts whose infection patterns often exhibit spatial and temporal variation. However, the association between endosymbiont prevalence and environmental factors remains unclear. Here, we surveyed endosymbionts in natural populations of the spider mite, Tetranychus truncatus, in China, screening 935 spider mites from 21 localities and 12 host plant species. Three facultative endosymbiont lineages, Wolbachia, Cardinium, and Spiroplasma, were detected at different infection frequencies (52.5%, 26.3%, and 8.6%, respectively). Multiple endosymbiont infections were observed in most local populations, and the incidence of individuals with the Wolbachia-Spiroplasma co-infection was higher than expected from the frequency of each infection within a population. Endosymbiont infection frequencies exhibited associations with environmental factors: Wolbachia infection rates increased at localities with higher annual mean temperature, while Cardinium and Spiroplasma infection rates increased at localities from higher altitudes. Wolbachia was more common in mites from Lycopersicon esculentum and Glycine max compared to Zea mays This study highlights that host-endosymbiont interactions may be associated with environmental factors, including climate and other geographically linked factors, as well as the host's food plant.IMPORTANCEThis study aims to study the incidence of endosymbiont distribution and infection patterns in spider mites. The main findings are that multiple endosymbiont infections were more common than expected, and that endosymbiont infection frequencies were associated with environmental factors. This work highlights that host-endosymbiont interactions need to be studied within an environmental and geographical context.

Publisher URL: http://doi.org/10.1128/AEM.02546-17

DOI: 10.1128/AEM.02546-17

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