Pyrosequencing of dddP genes revealed SAR116 clade as dominant DMS-producing bacteria in oligotrophic NW Pacific Ocean

Title
Pyrosequencing of dddP genes revealed SAR116 clade as dominant DMS-producing bacteria in oligotrophic NW Pacific Ocean
Author(s)
최동한; 박기태; 이기택; 조장천; 이정현; 노재훈
KIOST Author(s)
Choi, Dong Han(최동한)Lee, Jung Hyun(이정현)Noh, Jae Hoon(노재훈)
Publication Year
2014-11-19
Abstract
Dimethylsulfide (DMS) has been known to be a climatically active gas released into the atmosphere from oceans. The DMS is produced mainly by bacterial enzymatic cleavage of dimethylsulfoniopropionate (DMSP) and several DMSP lyases have been identified to date. To elucidate biogeographical distribution of bacteria relevant to DMS production, in this study, the diversity of dddP, which is most abundant DMS-producing gene, was investigated using newly developed primers and pyrosequencing method in the northwestern Pacific Ocean. Consistently with the previous studies, Roseobacters were major dddP-containing bacteria in coastal area. However, the genotypes closely related with SAR116 group were found to be a predominant fraction of dddP-containing bacteria in surface water of oligotrophic ocean. A DMSP-enriched culture experiment of SAR116 strain, Puniceispirillum marinum IMCC1322, showed that the strain can produce DMS from DMSP. Considering the huge area of oligotrophic waters and wide distribution of SAR116 group in the global ocean, they may play a significant role in climatically important DMS production and should be surely encompassed in biogeochemical studies of sulfur via bacteria-mediated DMSP degradation. identified to date. To elucidate biogeographical distribution of bacteria relevant to DMS production, in this study, the diversity of dddP, which is most abundant DMS-producing gene, was investigated using newly developed primers and pyrosequencing method in the northwestern Pacific Ocean. Consistently with the previous studies, Roseobacters were major dddP-containing bacteria in coastal area. However, the genotypes closely related with SAR116 group were found to be a predominant fraction of dddP-containing bacteria in surface water of oligotrophic ocean. A DMSP-enriched culture experiment of SAR116 strain, Puniceispirillum marinum IMCC1322, showed that the strain can produce DMS from DMSP. Considering the huge area of oligotrophic waters and wide distribution of SAR116 group in the global ocean, they may play a significant role in climatically important DMS production and should be surely encompassed in biogeochemical studies of sulfur via bacteria-mediated DMSP degradation.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25738
Bibliographic Citation
15th International Symposium on Microbial Ecology, 2014
Publisher
International
Type
Conference
Language
English
Publisher
International
Related Researcher
Research Interests

marine biotechnology,molecular microbiology,해양생명공학,분자미생물학

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