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Title: Composition of the bacterial community in the gut of the pine engraver, Ips pini (Say) (Coloptera) colonizing red pine

Author: Delalibera, Italo Jr.; Vasanthakumar, Archana; Burwitz, Benjamin J.; Schloss, Patrick D.; Klepzig, Kier D.; Handelsman, Jo; Raffa, Kenneth F.;

Date: 2007

Source: Symbiosos, Vol. 43: 97-104

Publication Series: Miscellaneous Publication

Description: The gut bacterial community of a bark beetle, the pine engraver Ips pini (Say), was characterized using culture-dependent and culture-independent methods. Bacteria from individual guts of larvae, pupae and adults were cultured and DNA was extracted from samples of pooled larval guts. Analysis of 16S rRNA gene sequences amplified directly from the gut community suggests that the gut bacterial communities associated with I. pini are relatively simple, compared to many other systems. Six bacterial genera from four classes were detected by culturing gut bacteria from larvae, pupae and adults. Two genera, Pantoea and Stenotrophomonas (γ-Proteobacteria) were found in all life stages of I. pini, consistently in larvae and adults, and less commonly in pupae. Sequences that affiliate with the Enterobactereaceae of the γ-Proteobacteria were found in 95% of the clones sampled. The Enterobactereaceae genera, Pantoea and Erwinia, accounted for 88% of all clone sequences. These results are consistent with previous work indicating that another bark beetle, the southern pine beetle, Dendroctonus frontalis Zimmerman, also has a relatively simple gut flora, compared with wood colonizing insects such as wood borers and termites. The composition and abundance of bacteria associated with different life stages of I. pini are possibly associated with specific functions of the gut bacterial communities of larvae, pupae, and adults.

Keywords: bark beetle, gut microbiota, 16s ribosomal RNA, rarefaction analysis

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Delalibera, Italo Jr.; Vasanthakumar, Archana; Burwitz, Benjamin J.; Schloss, Patrick D.; Klepzig, Kier D.; Handelsman, Jo; Raffa, Kenneth F. 2007. Composition of the bacterial community in the gut of the pine engraver, Ips pini (Say) (Coloptera) colonizing red pine. Symbiosos, Vol. 43: 97-104

 


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