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Microbiology and Biotechnology Letters

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Environmental Microbiology  |  Microbial Ecology and Diversity

Microbiol. Biotechnol. Lett.

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

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

Hee Sook Kim 1, Ka-Yoon Oh 1, Song Min Lee 1, Ji-Youn Kim 1, Kwang Hui Lee 1, Sang-Hyeon Lee 2 and Jeong Su Jang 1*

1Food Research Center, Angel Do., Ltd,, 2Department of Pharmaceutical Engineering, Silla University

Correspondence to :
Jeong Su Jang, 74, Saebyeoksijang-ro, Sasang-gu, Busan, Republic of Korea [46988]
Tel : 051-852-3636, Fax : 051-852-4477, E-mail : jeongsu25@naver.com

Abstract

The purpose of this study is to evaluate the antifungal activity, plant growth promoting activity, and mineral solubilization ability of 10 species of phytopathogenic fungi to select a Bacillus sp. isolated from rhizosphere soils and roots that can be used 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, every 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 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 suggest that Bacillus sp. can be considered as a 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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