Distribution of Cold-Adapted Ammonia-Oxidizing Microorganisms in the Deep-Ocean of the Northeastern Japan Sea
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概要
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We investigated the quantities and phylogenies of amoA genes of ammonia-oxidizing archaea (AOA) belonging to Crenarchaeota and ammonia-oxidizing bacteria (AOB) belonging to Betaproteobacteria in water columns and deep-ocean cold seep sediment in the northeastern Japan Sea with a competitive PCR (cPCR) assay. Water samples were collected at depths of 2000m and 2956m. Sediment samples were collected where white bacterial mats had developed. The cPCR analysis revealed five to ten times more AOA than betaproteobacterial AOB in both the water columns and sediment. The abundance of the crenarchaeotal amoA gene was estimated at 6×10^1 and 3×10^2 copies ml^<-1> in the water columns at depths of 2000m and 2956m, and 1×10^8 and 1×10^7 copies g^<-1> in pelagic brown sediment and black sediment, respectively. Most archaeal amoA clones from water column at 2000m fell into the Deep Marine Group. Most archaeal amoA clones from pelagic brown sediment were less closely related to known environmental clones. Moreover, incubation experiments revealed nitrite production at 4℃ and 10℃. The results indicate that psychrophilic AOA and AOB may be responsible for nitrification in the deep-ocean region of the northeastern Japan Sea.
- 日本微生物生態学会の論文
著者
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NAKAGAWA TATSUNORI
College of Bioresource Sciences, Nihon University
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Tanaka Tomohiro
Department Of Agricultural And Biological Chemistry College Of Bioresource Sciences Nihon University
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Kato Chiaki
Extremobiosphere Research Center, JAMSTEC
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TAKAHASHI Reiji
Department of Agricultural and Biological Chemistry, College of Bioresource Sciences, Nihon Universi
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TOKUYAMA Tatsuaki
Department of Agricultural and Biological Chemistry, College of Bioresource Sciences, Nihon Universi
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Takahashi Reiji
Department Of Agricultural Chemistry College Of Agriculture And Veterinary Medicine Nihon University
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Takahashi Reiji
Department Of Agricultural And Biological Chemistry College Of Bioresource Sciences Nihon University
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Tokuyama Tatsuaki
College Of Bioresource Sciences Nihon University
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Tokuyama Tatsuaki
Department Of Agricultural And Biological Chemistry College Of Bioresource Sciences Nihon University
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Nakagawa Tatsunori
College Of Bioresource Sciences Nihon University
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Mori Koji
Biological Resource Center (nbrc) Department Of Biotechnology National Institute Of Technology And E
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Tokuyama T
College Of Bioresource Sciences Nihon University
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NAKAGAWA TATSUNORI
Department of Agricultural and Biological Chemistry, College of Bioresource Sciences, Nihon Universi
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Tanaka Tomohiro
College Of Bioresource Sciences Nihon University
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Kato Chiaki
Extremobiosphere Res. Center Japan Agency For Marine-earth Sci. And Technol.
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Kato Chiaki
Extremobiosphere Research Center Japan Agency For Marine-earth Science And Technology (jamstec)
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