Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Comparison of Antifungal Activity, Plant Growth Promoting Activity, and Mineral-Solubilizing Ability of Bacillus sp. Isolated from Rhizosphere Soil and Root

근권 토양과 뿌리로부터 분리된 Bacillus sp.의 항진균 활성, 식물 생장 촉진 활성 및 미네랄 가용화능 비교

  • Received : 2021.06.02
  • Accepted : 2021.08.10
  • Published : 2021.12.28
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Abstract

The purpose of this study was to evaluate the antifungal activity, plant-growth-promoting activity, and mineral solubilization ability of 10 species of phytopathogenic fungi to select a Bacillus sp. from rhizosphere soils and roots that can be used as a microbial agent. The antifungal activity for phytopathogenic fungi varied based on the Bacillus sp. Among the selected strains, DDP4, DDP16, DDP148, SN56, and SN95 exhibited antifungal activity for nine or more species of phytopathogenic fungi. Regarding nitrogen-fixation ability, all Bacillus sp. showed similar levels of activity, and siderophore production ability was relatively high in ANG42 and DDP427. The indole-3-acetic acid production abilities were in the range of 1.83-67.91 ㎍/ml, with variations in activity based on the Bacillus sp. One strain with a high activity was selected from each species, and their mineral solubilization abilities were examined. Most Bacillus sp. could solubilize phosphoric acid and calcium carbonate, and DDP148 and SN56 could solubilize silicon and zinc, respectively. These results suggested that Bacillus sp. can be considered potential multi-purpose microbial agents for plant growth promotion and disease prevention.

본 연구는 근권 토양 및 뿌리에 존재하는 미생물 중 미생물 제제로 적합한 Bacillus sp.을 선별하기 위하여 10종의 식물 병원성 곰팡이에 대한 항진균 활성, 식물 생장 촉진 활성 및 미네랄 가용화능을 평가하였다. 식물 병원성 곰팡이에 대한 항진균 활성은 Bacillus sp.에 따른 차이를 보였으며, 선별된 균주 중 DDP4, DDP16, DDP148, SN56, SN95는 9종 이상의 식물 병원성 곰팡이에 대해 항진균 활성을 나타내었다. 질소고정능과 1-aminocyclopropane-1-carboxylic acid deaminase 생성능에서는 Bacillus sp. 모두 비슷한 수준으로 활성을 나타냈으며, siderophore 생성능은 ANG42와 DDP427에서 비교적 높게 나타났다. Indole-3-acetic acid 생성능은 1.83-67.91 ㎍/ml으로 확인되었으며, Bacillus sp.에 따른 활성 차이를 나타내었다. 이후 각 species마다 활성이 높은 1 균주씩 선정하여 미네랄 가용화능을 확인한 결과, 대부분의 Bacillus sp.에서 인산과 탄산칼슘 가용화능을 확인할 수 있었으며, DDP148과 SN56은 각각 규소 가용화능과 아연 가용화능도 나타내었다. 따라서, 본 연구에서 분리한 Bacillus sp.의 항진균 활성, 식물 생장 촉진 활성 및 미네랄 가용화능 결과를 통해 다목적 기능을 가진 미생물 제제로써 활용이 가능할 것으로 판단된다.

Keywords

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