Marine Ecosystems Research Department, Japan Marine Science and Technology Center (JAMSTEC)
Ocean Research Institute, University of Tokyo
Faculty of Agriculture, Iwate University
Faculty of Humanities and Social Sciences, Iwate University
Marine Ecosystems Research Department, Japan Marine Science and Technology Center (JAMSTEC)
登録日
2010-02-18
雑誌名
Venus : the Japanese journal of malacology
巻
59
号
4
ページ
307 - 316
発行年
2000-01-01
ISSN
0042-3580
Abstract
The bacterial endosymbionts of the vesicomyid clam Calyptogena fossajaponica, collected from the hadal zone in the Japan Trench, were characterized. Transmission electron microscopic (TEM) observations showed numerous bacteria in epithelial cells of the gill tissues of C. fossajaponica. Sulfur content and isotope analyses of this clam also suggested the presence of sulfur-oxidizing bacteria (thioautotrophs). Phylogenetic analysis based on the 16S ribosomal RNA gene (rDNA) sequence indicated that the bacteria was related to sulfur-oxidizing endosymbionts of other vesicomyid clams from deep-sea hydrothermal vents and cold seeps. The symbionts of C. fossajaponica formed a monophyletic group with the symbionts of C. magnifica, C. phaseoliformis and Calyptogena sp. (Florida Escarpment). These 4 species live relatively deeper than other vesicomyid clams whose symbionts have been phylogenetically characterized. Vertical distribution patterns of vesicomyid clams are likely influenced by their symbionts.
出版者
The malacological society of Japan
権利
The malacological society of Japan
本文データは学協会の許諾に基づきCiNiiから複製したものである
本著作物の著作権は日本貝類学会に帰属します。ご利用に当たっては著作権法ならびに日本貝類学会に従うことをお願いいたします。
Phylogenetic Characterization of the Endosymbionts of the Deepest-living Vesicomyid Clam, Calyptogena fossajaponica, from the Japan Trench
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