Munson M A, Baumann P, Clark M A, Baumann L, Moran N A, Voegtlin D J, Campbell B C
Department of Microbiology, University of California, Davis 95616-8665.
J Bacteriol. 1991 Oct;173(20):6321-4. doi: 10.1128/jb.173.20.6321-6324.1991.
Aphids (superfamily Aphidoidea) contain eubacterial endosymbionts localized within specialized cells (mycetocytes). The endosymbionts are essential for the survival of the aphid hosts. Sequence analyses of the 16S rRNAs from endosymbionts of 11 aphid species from seven tribes and four families have indicated that the endosymbionts are monophyletic. Furthermore, phylogenetic relationships within the symbiont clade parallel the relationships of the corresponding aphid hosts. Our findings suggest that this endocytobiotic association was established in a common ancestor of the four aphid families with subsequent diversification into the present species of aphids and their endosymbionts.
蚜虫（蚜总科）含有定位于特殊细胞（菌胞）内的真细菌内共生体。这些内共生体对于蚜虫宿主的生存至关重要。对来自七个族和四个科的11种蚜虫的内共生体的16S rRNA进行的序列分析表明，这些内共生体是单系的。此外，共生体分支内的系统发育关系与相应蚜虫宿主的关系平行。我们的研究结果表明，这种细胞内共生关联在四个蚜虫科的共同祖先中就已建立，随后分化成目前的蚜虫物种及其内共生体。
