Screening and Optimization of Fermentation Medium for Bacillus velezensis BP-1 and Its Biocontrol Effects against Peyronellaea arachidicola
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Published:2023-04-07
Issue:8
Volume:13
Page:4653
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ISSN:2076-3417
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Container-title:Applied Sciences
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language:en
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Short-container-title:Applied Sciences
Author:
Ahsan Taswar1ORCID,
Liang Chunhao1,
Yu Shuyi1,
Pei Xue1,
Xie Jinhui1,
Lin Ying1,
Liu Xiaozhou1,
Umair Muhammad2ORCID,
Zang Chaoqun1
Affiliation:
1. Institute of Plant Protection, Liaoning Academy of Agricultural Sciences, Shenyang 110161, China
2. College of Life Science, Zhejiang Normal University, Jinhua 321004, China
Abstract
In the submerged fermentation process, the introduction of novel nutrient media as sources of carbon and nitrogen can enhance antifungal activity. In this study, we used a submerged fermentation process to find the optimal media for the Bacillus velezensis BP-1 strain to grow in, and that would boost its antifungal activity against Peyronellaea arachidicola. By using a single-factor test and central composite design (CCD) in the response surface methodology, the optimal fermentation medium for the B. velezensis BP-1 strain was identified. The antagonistic potential of B. velezensis BP-1 was assayed against the P. arachidicola fungus to manage web blotch disease in peanut plant leaves. The LB medium was screened as the best medium, with a maximum antifungal activity of 90% in comparison to the other mediums. Semolina flour as the carbon source, peanut root extract as the nitrogen source, and magnesium sulfate as the inorganic salt were selected as the best nutrient components in comparison to the others. The response surface methodology was optimized by using 15 g/L of semolina flour as the carbon source, 13.68 g/L of peanut root extract as the nitrogen source, and 0.50 g/L of magnesium sulfate as the inorganic salt, achieving 90% inhibition of P. arachidicola. The in vitro bioassays showed that the optimized fermentation broth of B. velezensis BP-1 had significant antifungal activity, with an inhibition rate of 88.34% against P. arachidicola. In the pot experiments on disease control, the management effects revealed that the pre-inoculation spray of the B. velezensis BP-1 broth had significant efficiency (96%) when compared to the post-inoculation spray of the B. velezensis BP-1 broth. These findings suggest that the optimized fermentation broth of the B. velezensis BP-1 strain had strong antifungal activity. This could be a potent biocontrol tool for aiding in the early disease management of web blotch in peanut plants.
Funder
President’s Foundation Project of the Liaoning Academy of Agricultural Sciences
National Key Research and Development Program of China
Liaoning Province Youth Top Talent Project
Shenyang Young and Middle-aged Scientific and Technological Innovation Talents Support Plan
the basic scientific research business expenses of the Liaoning Academy of Agricultural Sciences
basic research expenses of the Liaoning Academy of Agricultural Sciences
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
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