昆虫次生内共生菌Rickettsia研究进展

摘要

Rickettsia隶属于变形菌纲Proteobacteria的α亚群立克次体科Rickeusiaceae革兰氏阴性菌,是形态多样的次生真核细胞内共生菌.Rickettsia的功能是多样的,在一些宿主中为营养共生菌,在另一些宿主中为生殖调控因子,或以昆虫为载体的植物病原菌,此外,Rickettsia还能增强宿主抗药性,提高宿主抵御天敌、高温或者其它致死因素的能力.本综述主要从Rickettsia的起源、分类、在昆虫体内的分布、传播方式、与昆虫生殖调控的关系以及基因组进化等方面,简述Rickettsia的研究进展,重点提出了Rickettsia研究中一些尚未解决的问题,期望通过这些研究进一步明确Rickettsia与昆虫之间的互作关系.%Rickettsia are sorts of negative-grambacteria of the Rickettsiaceae belonging to the α-Proteobacteria and the morphologically diverse secondary endosymbionts in eukaryotic cells.Rickettsia can be nutritional symbiont in some insects,but be reproduction manipulators in other insects,or as a kind of plant pathogenic bacteria in insects.Moreover,Rickettsia showed many host phenotypes in insect,such as enhancing insecticide resistance,natural enemy resistance,high temperature tolerance and so on.This review mainly focused on the research advances of Rickettsia in insect,including origins,diversity classification,distribution and transmission pathways,reproductive manipulation and genome evolution.Furthermore,we emphasized some controversial subjects and suggested ways in which study of nonpathogenic Rickettsia can advance our understanding of their relatives between Rickettsia and insects.