대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제35권10호
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  • Pages.687-693
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  • 2013
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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해안 사구에서 서식하는 토착식물로부터 분리된 근권미생물 Bacillus aerius MH1RS1의 식물성장 촉진 능력 연구

Plant Growth-promoting Ability by the Newly Isolated Bacterium Bacillus aerius MH1RS1 from Indigenous Plant in Sand Dune

  • 이은영 (수원대학교 환경에너지공학과) ;
  • 홍선화 (수원대학교 환경에너지공학과)
  • Lee, Eun Young (Department of Environmental and Energy Engineering, Suwon University) ;
  • Hong, Sun Hwa (Department of Environmental and Energy Engineering, Suwon University)
  • 투고 : 2013.09.05
  • 심사 : 2013.09.30
  • 발행 : 2013.10.30
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초록

다양한 난개발과 해안도로, 방파제 등의 인공 구조물 설치로 인한 해안 침식과 해안선 파괴 등으로 해안사구가 크게 훼손되고 있다. 이에 본 연구에서는 해안사구에서 서식하고 있는 토착식물의 근권으로부터 식물 성장 촉진 능력이 있으면서 동시에 염분에 강한 내성을 가지는 근권세균의 library를 구축하였고, 이들 균주를 대상으로 식물 성장 촉진 능력을 평가하였다. 또한, 내염성 식물을 대상으로 사구 토양에서의 성장률에 근권세균이 미치는 영향을 평가한 후, 훼손된 사구의 복원에 가장 유용한 미생물을 선별하고 분리된 근권세균이 식물 성장에 미치는 영향을 평가하였다. 실험은 선정된 균주와 갯기름나물과 줄무늬갈대를 해안사구에 식재한 후 성장에 미치는 영향을 평가하였다. 그 결과, MH1RS1는 (IAA) production, siderophores, 1-aminocyclopropane-1-carboxylate deaminase (ACC deaminase) 그리고 염분내성을 가지고 있다. 갯기름나물의 경우는 줄기의 길이와 뿌리의 무게는 크게 향상되었다. 특히, 줄기의 생체와 뿌리 무게는 control과 비교했을 때 25% 성장이 향상되었다. 줄무늬 갈대는 Bacillus aerius MH1RS1 에 의해 초장은 18%와 뿌리의 생체 중은 20%로 크게 향상 되었다.

Coastal sand dunes have been seriously damaged caused by the development thoughtless for the environment and coastal erosion and destruction due to artificial structures like coast roads and breakwater. Hereupon, in this study we made a library of rhizobacteria that have the plant growth-promoting ability for plant rhizosphere of indigenous plants inhabiting in a coastal sand dune as well as the strong tolerance to salt, and evaluated the plant growth-promoting ability of these strains. Furthermore, we evaluated the effect of rhizobacteria on the growth rate of saline tolerant plants in sandy soil; selected out the most useful micro-organism for the restoration of a damaged sand dune. The effect of inoculation of strains selected from the first experiment on the growth of Peucedanum japonicum and Arundo donaxes planted in a coastal sand dune was evaluated. As a result, Bacillus aerius MH1RS1 had plant growth promoting activities: indole acetic acid (IAA) production, siderophores and 1-aminocyclopropane-1-carboxylate deaminase (ACC deaminase) activity, and also had a salinity tolerance. Also, in case of Peucedanum japonicum, the length of stems and weights of roots were enhanced by the inoculation of B. aerius MH1RS1. Fresh weights of stems and weights of roots in experimental group were, in particular, increased by 25% comparing with the control group. For an Arundo donax in experimental group, plant length increased by 18%, and weight of roots by 20% which is significant.

키워드

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