Bacterial Communities in the Midgut of Ponerine Ants (Hymenoptera: Formicidae: Ponerinae)

Tássio Brito de Oliveira, Milene Ferro, Maurício Bacci, Danival José de Souza, Renato Fontana, Jacques Hubert Charles Delabie, Aline Silva

Abstract


Symbiotic microorganisms are directly related to the ecological success of host insects, influencing many aspects of their biology. The present study is the first to investigate the microbiota associated with ants of the subfamily Ponerinae and aims to identify the bacterial midgut communities of Dinoponera lucida, Pachycondyla curvinodis, Pachycondyla striata, Odontomachus brunneus and Odontomachus bauri. After dissecting the midguts of these ants, DNA was extracted, and the bacterial 16S rRNA gene was amplified via PCR using the universal primers pair 27F/1492R. The obtained PCR products were cloned and sequenced using an ABI 3500 automated sequencer. The sequences were grouped into operational taxonomic units (OTUs) based on a 97% similarity criterion using MOTHUR. The greatest species richness was observed in O. bauri, with 15 OTUs, followed by D. lucida with five OTUs, O. brunneus, with four OTUs, and P. curvinodis and P. striata, both with three OTUs. There were representatives of the phyla Actinobacteria, Proteobacteria, Tenericutes and Firmicutes, including the genera Bartonella, Mesoplasma, Mesorhizobium, Spiroplasma, Wolbachia and Serratia in the guts of the studied Ponerine ants. The low microbial diversity observed given the predatory trophic habits of the species studied suggests that there is selection for these microorganisms, predominantly preserving symbionts with functional roles that are able to colonize this environment. It is also valid to infer that the identified bacteria are predominant in the gut and exhibit mutualistic functions that are important for immunity, reproduction and nutrition; moreover, a subset may be parasites that have considerable impacts on the studied ants.


Keywords


16S rRNA; Dinoponera; Odontomachus; Pachycondyla; symbionts

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References


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DOI: http://dx.doi.org/10.13102/sociobiology.v63i1.882

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