Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Soil Bacterial Community in Red Pine Forest of Mt. Janggunbong, Bonghwa-Gun, Gyeongbuk, Korea, Using Next Generation Sequencing

차세대염기서열방법을 이용한 경북 봉화군 장군봉 소나무림의 토양 박테리아 군집 구성

  • Lee, Byeong-Ju (Department of Forest Resources, Kongju National University) ;
  • Eo, Soo Hyung (Department of Forest Resources, Kongju National University)
  • 이병주 (공주대학교 산림자원학과) ;
  • 어수형 (공주대학교 산림자원학과)
  • Received : 2017.02.07
  • Accepted : 2017.04.11
  • Published : 2017.06.30
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Abstract

The soil microbiome plays important roles in material cycling and plant growth in forest ecosystem. Although a lot of researches on forest soil fungi in Korea have been performed, the studies on forest soil bacterial communities have been limited. In this study, we conducted next generation sequencing (NGS) targeting 16S rRNA gene to investigate the soil bacterial communities from natural red pine (Pinus densiflora) forest in Mt. Janggunbong, Bonghwa-gun, Gyeongbuk, Korea. Our results showed that the entire bacterial communities in the study sites include the phyla Proteobacteria, Acidobacteria, Actinobacteria, Planctomycetes, which have been typically observed in forest soils. The composition ratio of Proteobacteria was the highest in the soil bacteria community. The results reflect that Proteobacteria is copiotroph, which generally favors relatively nutrient-rich conditions with abundant organic matter. Some rhizobia species such as Burkholderia, Bradyrhizobium, Rhizobium, which are known to contribute to soil nitrogen-fixation, exist in the study sites. As a result of correlation analysis between soil physicochemical characteristics and bacteria communities, the soil pH was significantly correlated with the soil bacteria compositions.

토양미생물은 산림 생태계 구성 요소로써 산림 내 물질 순환 및 식물 생장 등에 중요한 역할을 한다. 그러나 국내 산림과학분야에서는 토양 균류 일부 종에 대한 연구가 주로 실시되어졌으며, 박테리아를 포함한 미생물 군집에 대한 연구는 부족한 실정이다. 본 연구에서는 16S rRNA gene 영역에 대한 차세대염기서열분석법을 통해, 장군봉 천연 소나무림 토양 내 존재하는 박테리아 군집 구성을 파악하였다. 분석 결과, phylum 수준에서 Proteobacteria, Acidobacteria, Actinobacteria, Planctomycetes 등이 나타나, 전형적인 토양 박테리아 군집 구성을 보였다. 또한, 부영양 환경을 선호하는 Proteobacteria가 가장 높은 비율을 차지하였는데, 다른 인공림과 비교하여 장군봉 천연 소나무림 토양 유기물량이 상대적으로 풍부한 것이 원인으로 생각된다. 한편, 토양 내 질소 순환에 기여를 하는 뿌리혹박테리아 분류군을 살펴본 결과, Burkholderia, Bradyrhizobium, Rhizobium 속이 주로 존재하는 것을 확인하였다. 토양 물리 화학적 특성과 박테리아 군집 구성간의 상관관계를 분석한 결과, 토양 내 pH가 박테리아 군집 구성과 관련된 주요 토양 특성인 것으로 확인되었다.

Keywords

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