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Microbiology and Biotechnology Letters

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Environmental Microbiology (EM)  |  Microbial Ecology and Diversity

Microbiol. Biotechnol. Lett. 2021; 49(3): 403-412

https://doi.org/10.48022/mbl.2105.05013

Received: May 31, 2021; Revised: July 12, 2021; Accepted: July 13, 2021

근권에 존재하는 Bacillus 속 균주들의 식물 생장 촉진 활성 특성

Plant Growth-Promoting Activity Characteristics of Bacillus Strains in the Rhizosphere

Ka-Yoon Oh1, Ji-Youn Kim1, Song Min Lee1, Hee Sook 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 46988, Republic of Korea

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

This study aimed to identify plant growth-promoting activity, phytopathogenic fungi growth inhibitory activity, mineral solubilization ability, and extracellular enzyme activity of the genus Bacillus in soil and the rhizosphere. With regards to antifungal activity against phytopathogenic fungi, DDP257 showed antifungal activity against all 10 pathogenic fungi tested. ANG20 showed the highest ability to produce indole- 3-acetic acid, a plant growth-promoting factor (70.97 μg/ml). In addition, 10 species were identified to have 1-aminocyclopropane-1-carboxylate deaminase production ability, and most isolates showed nitrogen fixation and siderophore production abilities. Thereafter, the isolated strains’ ability to solubilize minerals such as phosphate, calcite, and zinc was identified. With extracellular enzyme activity, the activity appeared in most enzymes. In particular, all the strains showed similar abilities for alkaline phosphatase, esterase (C4), acid phosphatase, and naphtol-AS-BI-phosphohydrolase production. This result was observed because the genus Bacillus secreted various organic substances, antibiotics, and extracellular enzymes. Therefore, through the results of this study, we suggest the possibility of using strains contributing to the improvement of the soil environment as microbial agents.

Keywords: Bacillus sp., mineral solubilization, antifungal activity, plant growth promoting rhizobacteria

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