Wolbachia infection in crustaceans:: novel hosts and potential routes for horizontal transmission

被引:147
作者
Cordaux, R [1 ]
Michel-Salzat, A [1 ]
Bouchon, D [1 ]
机构
[1] Univ Poitiers, Lab Genet & Biol Populat Crustaces, CNRS, UMR 6556, F-86022 Poitiers, France
关键词
associated species; Crustacea; horizontal transfers phylogeny; Wolbachia; wsp gene;
D O I
10.1046/j.1420-9101.2001.00279.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Thirty-five percent of isopods are estimated to be infected by Wolbachia, an intracellular maternally inherited alpha -Proteobacterium. Previous studies have indicated that horizontal transfer of Wolbachia strains may occur, although the mechanisms are unclear. The wsp gene was sequenced from 17 Wolbachia strains harboured by crustacean host species and three from their associated predators and parasites. Two major clades of Wolbachia were found in crustacean, with relatives also found in insects, the other restricted to crustaceans. Highly divergent Wolbachia strains were found in a woodlouse-eating spider and its prey, suggesting no intertaxon bacterial exchange via the predator-prey route. The phylogenetic proximity of Wolbachia from parasitoid flies or phoretic mites to those from isopods suggests that horizontal symbiont transmission may have occurred between those taxa. Two distant Wolbachia strains were detected in two intertidal amphipods; these strains were closely related to different coastal isopod symbionts, suggesting Wolbachia transmission may occur between distantly related crustacean hosts living under the same ecological conditions.
引用
收藏
页码:237 / 243
页数:7
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