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[PMID]:26048932
[Au] Autor:Sapountzis P; Zhukova M; Hansen LH; Sørensen SJ; Schiøtt M; Boomsma JJ
[Ad] Endereço:Centre for Social Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark sapountzis@bio.ku.dk jjboomsma@bio.ku.dk.
[Ti] Título:Acromyrmex Leaf-Cutting Ants Have Simple Gut Microbiota with Nitrogen-Fixing Potential.
[So] Source:Appl Environ Microbiol;81(16):5527-37, 2015 Aug 15.
[Is] ISSN:1098-5336
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Ants and termites have independently evolved obligate fungus-farming mutualisms, but their gardening procedures are fundamentally different, as the termites predigest their plant substrate whereas the ants deposit it directly on the fungus garden. Fungus-growing termites retained diverse gut microbiota, but bacterial gut communities in fungus-growing leaf-cutting ants have not been investigated, so it is unknown whether and how they are specialized on an exclusively fungal diet. Here we characterized the gut bacterial community of Panamanian Acromyrmex species, which are dominated by only four bacterial taxa: Wolbachia, Rhizobiales, and two Entomoplasmatales taxa. We show that the Entomoplasmatales can be both intracellular and extracellular across different gut tissues, Wolbachia is mainly but not exclusively intracellular, and the Rhizobiales species is strictly extracellular and confined to the gut lumen, where it forms biofilms along the hindgut cuticle supported by an adhesive matrix of polysaccharides. Tetracycline diets eliminated the Entomoplasmatales symbionts but hardly affected Wolbachia and only moderately reduced the Rhizobiales, suggesting that the latter are protected by the biofilm matrix. We show that the Rhizobiales symbiont produces bacterial NifH proteins that have been associated with the fixation of nitrogen, suggesting that these compartmentalized hindgut symbionts alleviate nutritional constraints emanating from an exclusive fungus garden diet reared on a substrate of leaves.
[Mh] Termos MeSH primário: Alphaproteobacteria/isolamento & purificação
Formigas/microbiologia
Entomoplasmatales/isolamento & purificação
Microbioma Gastrointestinal
Fixação de Nitrogênio
Wolbachia/isolamento & purificação
[Mh] Termos MeSH secundário: Alphaproteobacteria/genética
Alphaproteobacteria/fisiologia
Animais
Entomoplasmatales/fisiologia
Oxirredutases/genética
Simbiose
Wolbachia/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
EC 1.- (Oxidoreductases); EC 1.18.6.1 (nitrogenase reductase)
[Em] Mês de entrada:1604
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150607
[St] Status:MEDLINE
[do] DOI:10.1128/AEM.00961-15



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