title: Bacterial microbiome of Coptotermes curvignathus (Isoptera: Rhinotermitidae) reflects the coevolution of species and dietary pattern.
abstract: Coptotermes curvignathus Holmgren is capable of feeding on living trees. This ability is attributed to their effective digestive system that is furnished by the termite's own cellulolytic enzymes and cooperative enzymes produced by their gut microbes. In this study, the identity of an array of diverse microbes residing in the gut of C. curvignathus was revealed by sequencing the near-full-length 16S rRNA genes. A total of 154 bacterial phylotypes were found. The Bacteroidetes was the most abundant phylum and accounted for about 65% of the gut microbial profile. This is followed by Firmicutes, Actinobacteria, Spirochetes, Proteobacteria, TM7, Deferribacteres, Planctomycetes, Verrucomicrobia, and Termite Group 1. Based on the phylogenetic study, this symbiosis can be a result of long coevolution of gut enterotypes with the phylogenic distribution, strong selection pressure in the gut, and other speculative pressures that determine bacterial biome to follow. The phylogenetic distribution of cloned rRNA genes in the bacterial domain that was considerably different from other termite reflects the strong selection pressures in the gut where a proportional composition of gut microbiome of C. curvignathus has established. The selection pressures could be linked to the unique diet preference of C. curvignathus that profoundly feeds on living trees. The delicate gut microbiome composition may provide available nutrients to the host as well as potential protection against opportunistic pathogen.
authors.affiliation: Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia Bintulu Sarawak Campus, Sarawak.
authors.forename: Jie Hung Patricia
authors.initials: JH
authors.lastname: King
authors.forename: Nor Muhammad
authors.initials: NM
authors.lastname: Mahadi
authors.forename: Choon Fah Joseph
authors.initials: CF
authors.lastname: Bong
authors.forename: Kian Huat
authors.initials: KH
authors.lastname: Ong
authors.forename: Osman
authors.initials: O
authors.lastname: Hassan
mesh_terms: D000818:Animals; D001419:Bacteria / Q000145:classification / Q000235:genetics / Q000302:isolation & purification; D018407:Bacterial Physiological Phenomena; D001426:Bacterial Proteins / Q000235:genetics; D005075:Biological Evolution; D004032:Diet; D041981:Gastrointestinal Tract / Q000382:microbiology; D007113:Immunity, Innate; D020049:Isoptera / Q000276:immunology / Q000382:microbiology* / Q000502:physiology*; D064307:Microbiota; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013559:Symbiosis
chemical_list: D001426:Bacterial Proteins; D012336:RNA, Ribosomal, 16S
keywords: Coptotermes curvignathus; diet preference; gut microbiome; selection