Genomic and transcriptomic analyses reveal metabolic complementarity between whiteflies and their symbionts  

作　　者：Dan-Tong Zhu Qiong Rao Chi Zou Fei-Xue Ban Juan-Juan Zhao Shu-Sheng Liu 

机构地区：[1]Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects,Institute of Insect Sciences,Zhejiang University,Hangzhou,310029 China [2]School of Agriculture and Food Science,Zhejiang Agriculture and Forestry University,Lin'an,Hangzhou,311300 China

出　　处：《Insect Science》2022年第2期539-549,共11页昆虫科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Project no.:31772173).

摘　　要：Nutritional mutualism between insects and symbiotic bacteria is widespread.The various sap-feeding whitefly species within the Bemisia tabaci complex associate with the same obligate symbiont(Portiera)and multiple secondary symbionts.It is often assumed that some of the symbionts residing in the whiteflies play crucial roles in the nutritional physiology of their insect hosts.Although effort has been made to understand the functions of the whitefly symbionts,the metabolic complementarity offered by these symbionts to the hosts is not yet well understood.We examined two secondary symbionts,Arsenophonus and Wolbachia,in two species of the B.tabaci whitefly complex,provisionally named as Asia II 3 and China 1.Genomic sequence analyses revealed that Arsenophonus and Wolbachia retained genes responsible for the biosynthesis of B vitamins.We then conducted transcriptomic surveys of the bacteriomes in these two species of whiteflies together with that in another species named MED of this whitefly complex previously reported.The analyses indicated that several key genes in B vitamin syntheses from the three whitefly species were identical.Our findings suggest that,similar to another secondary symbiont Hamiltonella,Arsenophonus and Wolbachia function in the nutrient provision of host whiteflies.Although phylogenetically distant species of symbionts are associated with their respective hosts,they have evolved and retained similar functions in biosynthesis of some B vitamins.Such metabolic complementarity between whiteflies and symbionts represents an important feature of their coevolution.

关 键 词：SYMBIONT B vitamins COMPLEMENT evolution WHITEFLY 

分 类 号：S47[农业科学—农业昆虫与害虫防治]