Skip to Main content Skip to Navigation
Journal articles

Small but Powerful, the Primary Endosymbiont of Moss Bugs, Candidatus Evansia muelleri, Holds a Reduced Genome with Large Biosynthetic Capabilities

Abstract : Moss bugs (Coleorrhyncha: Peloridiidae) are members of the order Hemiptera, and like many hemipterans, they have symbiotic associations with intracellular bacteria to fulfill nutritional requirements resulting from their unbalanced diet. The primary endosymbiont of the moss bugs, Candidatus Evansia muelleri, is phylogenetically related to Candidatus Carsonella ruddii and Candidatus Portiera aleyrodidarum, primary endosymbionts of psyllids and whiteflies, respectively. In this work, we report the genome of Candidatus Evansia muelleri Xc1 from Xenophyes cascus, which is the only obligate endosymbiont present in the association. This endosymbiont possesses an extremely reduced genome similar to Carsonella and Portiera. It has crossed the borderline to be considered as an autonomous cell, requiring the support of the insect host for some housekeeping cell functions. Interestingly, in spite of its small genome size, Evansia maintains enriched amino acid (complete or partial pathways for ten essential and six nonessential amino acids) and sulfur metabolisms, probably related to the poor diet of the insect, based on bryophytes, which contains very low levels of nitrogenous and sulfur compounds. Several facts, including the congruence of host (moss bugs, whiteflies, and psyllids) and endosymbiont phylogenies and the retention of the same ribosomal RNA operon during genome reduction in Evansia, Portiera, and Carsonella, suggest the existence of an ancient endosymbiotic Halomonadaceae clade associated with Hemiptera. Three possible scenarios for the origin of these three primary endosymbiont genera are proposed and discussed.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03270137
Contributor : Diego Santos Garcia <>
Submitted on : Thursday, June 24, 2021 - 3:33:27 PM
Last modification on : Tuesday, August 31, 2021 - 1:52:03 PM

File

Santos-Garcia et al. - 2014 - ...
Publisher files allowed on an open archive

Identifiers

Citation

Diego Santos-Garcia, Amparo Latorre, Andrés Moya, George Gibbs, Viktor Hartung, et al.. Small but Powerful, the Primary Endosymbiont of Moss Bugs, Candidatus Evansia muelleri, Holds a Reduced Genome with Large Biosynthetic Capabilities. Genome Biology and Evolution, Society for Molecular Biology and Evolution, 2014, 6 (7), pp.1875-1893. ⟨10.1093/gbe/evu149⟩. ⟨hal-03270137⟩

Share

Metrics

Record views

12

Files downloads

7