Thermodesulfovibrio a possible indicator of Hydrothermal fluids

Thermodesulfovibrio a possible indicator of Hydrothermal fluids
권개경; 조현희; 김상진; 이정현; 함동진; 김현섭; 이경용
KIOST Author(s)
Kwon, Kae Kyoung(권개경)Lee, Jung Hyun(이정현)Ham, Dong Jin(함동진)Kim, Hyun Sub(김현섭)
Publication Year
Marine bacteria inhabited in the hydrothermal vent area obtain energy by the oxidation of various gases and/or minerals in the vent fluid. Bacterial community structure of the sediments from two different deep sea mountains, TA22 & TA26, on the Tofua Arc in the Southern Pacific Ocean was investigated by the deep sequencing of 16S rRNA gene partial fragments. Community structure at surface area to the depth of 5 cm of TA22 and those in TA26 to the depth of 15 cm at the phylum level was not markedly different but that at deeper than 5 cm in TA26 was quite different. The proportion of sequences affiliated to the phylum OD1, OP3, Nitrospirae, SAR406, and GN04 was higher but frequency of Acidobactria, SAR202, Gemmatimonadetes, and Proteobacteria was lower in the 5 to 10 cm depth at TA26 compared to those in other samples. The community composition of phylum Nitrospirae was investigated further and found that sequences affiliated into the class Thermodesulfovibrio suddenly increased in TA26 with increase of sediment depth but that of class Nitrospira was dominant in the TA22 at all sampled depths. Qualitative estimation of sulfur contents was increased with depth from 3 cm in TA26 and markedly higher than that in TA22. This result implied that frequency of several bacterial phyla or class, especially members affiliated into the class Thermodesulfovibrio reflects the existence of geothermal fluids and, it could be an indicator of hydrothermal vent.
Bibliographic Citation
2010 한국미생물학회연합 국제학술대회, pp.203, 2010
Related Researcher
Research Interests

marine biotechnology,molecular microbiology,해양생명공학,분자미생물학

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