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Diversity and function of aerobic culturable bacteria in the intestine of the sea cucumber Holothuria leucospilota

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Title: Diversity and function of aerobic culturable bacteria in the intestine of the sea cucumber Holothuria leucospilota
Authors: Zhang, Xiaochi / Nakahara, Tomomi / Miyazaki, Masayuki / Nogi, Yuichi / Taniyama, Shigeto / Arakawa, Osamu / Inoue, Tetsushi / Kudo, Toshiaki
Issue Date: 19-Jan-2013
Publisher: 応用微生物学研究奨励会 / The Microbiology Research Foundation
Citation: The Journal of General and Applied Microbiology, 58(6), pp.447-456; 2012
Abstract: Sea cucumbers play an important role in nutrient cycling of marine ecosystems by consuming sediments and moving sand, thus occupying a similar niche to earthworms in terrestrial ecosystems. However, our understanding of microbial diversity and functions associated with sea cucumbers is meager. Here, we isolated 141 bacterial strains under aerobic conditions using various media from the intestine of Holothuria leucospilota, a common sea cucumber in Japanese warm waters. By partial 16S rRNA gene sequences of the isolates, the isolates were tentatively affiliated with 55 described species. Among them, 23 species were common between 2 individuals of H. leucospilota. High diversity was observed in the genera Bacillus and Vibrio, which are often found in marine sediments, marine animals and other various environments. Most isolates showed various polysaccharide degradation activities and were able to grow under or were tolerant of anaerobic condition. We suggest that these aerobically isolated bacteria can play a role in digestion of detritus in aerobic and/or anaerobic regions of the intestine.
Keywords: aerobic culturable bacteria / diversity / function / Holothuria leucospilota / 16S rRNA gene / sea cucumber
URI: http://hdl.handle.net/10069/30967
ISSN: 00221260
DOI: 10.2323/jgam.58.447
Relational Links: http://hdl.handle.net/10069/31177
Rights: © 2012, The Microbiology Research Foundation
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/30967

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