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Microbiology and Biotechnology Letters

보문(Article)

Environmental Microbiology  |  Microbial Ecology and Diversity

Microbiol. Biotechnol. Lett.

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

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

Ka-Yoon Oh 1, Ji-Yoon Kim 1, Song Min Lee 1, Hee Sook 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

This study was intended 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. Regarding antifungal activity against phytopathogenic fungi, DDP257 showed antifungal activity against all 10 pathogenic fungi. Concerning the ability to produce indole-3-acetic acid, a plant growth-promoting factor, ANG20 showed the highest level at 70.97μg/mL. In addition, in the investigation of 1-aminocyclopropane-1-carboxylate deaminase production ability, the production ability was identified in a total of 10 species, and in the investigation of nitrogen fixation ability and siderophore production ability, the activity was identified in most isolates. 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 activity in alkaline phosphatase, esterase (C4), acid phosphatase, and naphtol-AS-BI-phosphohydrolase. This result appeared because the genus Bacillus secreted various organic substances, antibiotics, and extracellular enzymes. Therefore, through the results of this study, the possibility of using strains contributing to the improvement of the soil environment as microbial agents is suggested.

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

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