식생대와 비식생대 퍼갯벌의 미생물 호흡경로와 관련된 delta-proteobacteria 군집구조
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Title
- 식생대와 비식생대 퍼갯벌의 미생물 호흡경로와 관련된 delta-proteobacteria 군집구조
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Alternative Title
- COMMUNITY STRUCTURE OF DELTA-PROTEOBACTERIA ASSOCIATED WITH PATHWAYS OF MICROBIAL RESPIRATION IN VEGETATED AND UNVEGETATED INTERTIDAL MUDFLAT
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Author(s)
- 현정호; 목진숙; 조혜연; 김성한; JE Kostka
- KIOST Author(s)
- Kim, Sung Han(김성한)
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Alternative Author(s)
- 조혜연; 김성한
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Publication Year
- 2006-08-21
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Abstract
- This study was to relate pathways of microbial respiration to molecular hylogenetic evidence in the unvegetated (UMF) and vegetated mudflat (VMF) covered by Suaeda japonica in Korea. Concentrations of Fe2+ at VMF were 4X higher in July (3.6 mmol m-2) and 15X higher in Octover (35.2 mmol m-2) than at UMF (0.9 mmol m-2 in July and 2.3 mmol m-2 in October). C mineralization in July was 3.2X higher at VMF (142.1 mmolC m-2d-1) than at UMF (45.4 mmolC m-2d-1), whereas C mineralization in October was only 1.6X higher at VMF (30.4 mmolC m-2d-1) than at the UMF (18.4 mmolC m-2d-1). The rate of sulfate reduction in July was 2.9X higher at VMF (53.0 mmolS m-2d-1) than at UMF (18.4 mmolS m-2d-1), but little difference was observed between VMF (9.3 mmolS m-2d-1) and UMF (10.9 mmolS m-2d-1) in October. Highest rates of C respiration and sulfate reduction at VMF in July indicated that actively growing plant roots and rhizomes excrete DOM, fueling bacterial metabolism. Molecular phylogenetic analysis of delta-Proteobacteria clones based on 16S rDNA sequence revealed that Desulfuromonas/Pelobacter using Fe(III) and So as an electron acceptor were dominating at the rhizosphere of VMF, whereas most sulfate reducing bacterial clones (Desulfobacterium & Desulfobulbus) were observed at both UMF and VMF sites. Combinations of biogeochemical measurements and molecular phylogenetic evidence indicated that, although sulfate reduction was a prevailing C mineralization pathway in the organic rich intertidal mudflat, microbial Fe(III) reduction was a significant C mineralization pathway at VMF site.
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/30922
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Bibliographic Citation
- 11th ISME, pp.74, 2006
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Publisher
- ISME
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Type
- Conference
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Language
- English
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