Microbes and Environments
Online ISSN : 1347-4405
Print ISSN : 1342-6311
ISSN-L : 1342-6311
Short Communication
Identification of Endosymbiotic Methanogen and Ectosymbiotic Spirochetes of Gut Protists of the Termite Coptotermes formosanus
Jun-Ichi InoueSatoko NodaYuichi HongohSadaharu UiMoriya Ohkuma
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2008 Volume 23 Issue 1 Pages 94-97


Prokaryotic associations with gut protists of the termite Coptotermes formosanus were investigated based on 16S rRNA gene sequences. An endosymbiotic methanogen of Spirotrichonympha leidyi phylogenetically grouped with endosymbionts of other gut protists in the genus Methanobrevibacter, seemed to be unrelated to the host protist phylogeny. Three different lineages of ectosymbiotic spirochetes in the genus Treponema were identified in single cells of Holomastigotoides mirabile, indicating their simultaneous occurrence. Although these symbionts represented mere minor populations in the gut, their phylogenetic assignments suggest a common symbiotic relationship involving H2 metabolism.

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© Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology
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