Bacterial microbiota associated with ants of the genus Tetraponera

Sascha Stoll, Juergen Gadau, Roy Gross, Heike Feldhaar

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

Tropical arboreal ants mainly feed as 'secondary herbivores', relying mostly on nitrogen-poor homopteran exudates as food. It has been speculated that this nitrogen-limitation of their diet may be overcome by nutritional upgrading with the help of symbiotic bacteria. We examined the bacterial diversity associated with several representatives of three species groups of the arboreal ant genus Tetraponera based on genes encoding 16S rRNA, citrate synthase and a structural protein of the dinitrogenase complex (nifH). The bacterial microflora showed group-specificity, suggesting long-term association between ants and bacteria. In all specimens of four species of the nigra group, we detected bacteria closely related to Bartonella (order Rhizobiales). Ants of the allaborans group harboured bacteria belonging to the enterobacteria. In Tetraponera pilosa of the third species group, we found the enterobacterium Pantoea agglomerans. In spite of the different phylogenetic affiliation of the bacteria identified in the three species groups, the presence of nifH in most species suggests a role in nitrogen metabolism of the bacterial microbiota. We also detected a high infection rate with the intracellular bacterium Wolbachia in all Tetraponera species groups. Besides the widespread bacteria found in Tetraponera, we discovered a diverse group of bacteria represented by single sequences.

Original languageEnglish (US)
Pages (from-to)399-412
Number of pages14
JournalBiological Journal of the Linnean Society
Volume90
Issue number3
DOIs
StatePublished - Mar 1 2007

Keywords

  • 16S rRNA
  • Formicidae
  • Gut flora
  • Nitrogen fixation
  • Rhizobiales
  • Symbiosis
  • TGGE

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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