Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Comparison of community structure of sulfate reducing bacteria in rice paddy and dry farming soils

논과 밭 토양의 황산염 환원세균 군집 구조 비교

  • Lee, Jung Bae (Department of Biological Science and Biotechnology, Hannam University) ;
  • Park, Kyeong Ryang (Department of Biological Science and Biotechnology, Hannam University)
  • 이중배 (한남대학교 대덕밸리캠퍼스 생명시스템과학과) ;
  • 박경량 (한남대학교 대덕밸리캠퍼스 생명시스템과학과)
  • Received : 2015.02.12
  • Accepted : 2015.03.26
  • Published : 2015.03.31
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Abstract

The goal of this study was to identify relationships between the composition of sulfate reducing bacterial assemblages and terminal restriction fragment length polymorphism (T-RFLP) patterns in rice paddy and dry farming soils. Samples of organic farming soils, conventional farming soils, and dry field farming soils were collected in August and November. Analyses of the soil chemical composition revealed similar total nitrogen, total carbon and total inorganic phosphorus levels; however, the moisture content and total carbon were higher than in the other soils in both August and November, respectively. Sulfate reducing bacteria utilizing lactic acid were more widely distributed than those that used acetic acid, and the number of sulfate reducing bacteria in organic farming soil was most abundant. Phylogenetic analysis based on 181 clones revealed that most showed low similarity with cultured sulfate reducing bacteria, but more than 90% similarity with an uncultured sulfate reducing bacteria isolated from the environment. T-RFLP analysis revealed that fragments of 91, 357, 395, and 474 bp were most common, and the community structure of sulfate reducing bacteria changed seasonally.

본 연구는 논과 밭 토양의 황산염 환원세균의 군집구조와 T-RFLP 패턴을 조사한 논문으로, 유기 농법 토양과 관행 농법 토양 그리고 밭 토양 총 3종류의 토양을 8월과 11월에 채집하여 실험하였다. 토양 성분 분석 결과 총 질소, 총 탄소, 총 인의 값은 모든 토양이 비슷하게 나타났고 계절별로는 수분의 함량은 8월에, 총 탄소는 11월에 가장 높게 나타났다. 황산염 환원세균은 초산보다 젖산을 기질로 이용하는 황산염 환원세균이 더 많이 분포하고, 유기 농법 토양에 황산염 환원세균이 가장 많이 분포하는 것으로 나타났다. 각 토양에서 얻은 총 181개 클론으로 계통학적 분석을 한 결과, 대부분의 클론들은 배양 가능한 황산염 환원세균과는 매우 낮은 상동성을 보였으나, 자연계에서 확인되는 클론들과는 90% 이상의 높은 상동성을 나타내었다. T-RFLP 분석 결과 91, 357, 395, 474 bp의 분포가 가장 높았고, 계절에 따라 황산염 환원세균의 군집 구조가 달라지는 것을 확인하였다.

Keywords

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