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Microbiology and Biotechnology Letters

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Environmental Microbiology (EM)  |  Microbial Ecology and Diversity

Microbiol. Biotechnol. Lett. 2021; 49(4): 576-586

https://doi.org/10.48022/mbl.2106.06003

Received: June 2, 2021; Revised: August 9, 2021; Accepted: August 10, 2021

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

Comparison of the Antifungal Activity, Plant Growth Promoting Activity, and Mineral Solubilization Ability of Bacillus sp. Isolated from Rhizosphere Soils and Roots

Hee Sook Kim1, Ka-Yoon Oh1, Song Min Lee1, Ji-Youn Kim1, Kwang Hui Lee1, Sang-Hyeon Lee2, and Jeong Su Jang1*

1Food Research Center, Angel Co., Ltd., Busan 46988, Republic of Korea 2Department of Pharmaceutical Engineering, Silla University, Busan 46958, Republic of Korea

Correspondence to :
Jeong Su Jang,    jeongsu25@naver.com

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 μg/ 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.

Keywords: Bacillus sp., microbial agent, mineral solubilization, plant growth promoting rhizobacteria, extracellular enzyme

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