1887

Abstract

( Blochmannia gen. nov.) is the primary bacterial endosymbiont of the ant genus Like other obligate endosymbionts of insects, occurs exclusively within eukaryotic cells and has experienced long-term vertical transmission through host lineages. In this study, PFGE was used to estimate the genome size of as approximately 800 kb, which is significantly smaller than its free-living relatives in the enterobacteria. This small genome implies that has deleted most of the genetic machinery of related free-living bacteria. Due to restricted gene exchange in obligate endosymbionts, the substantial gene loss in and other insect mutualists may reflect irreversible specialization to a host cellular environment.

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2002-08-01
2022-01-16
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