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ORIGINAL RESEARCH article

Front. Microbiol.
Sec. Microbe and Virus Interactions with Plants
Volume 15 - 2024 | doi: 10.3389/fmicb.2024.1504660
This article is part of the Research Topic Bacillus and Pseudomonas as Plant Friends: Molecular, Physiological and Ecological Interactions View all 5 articles

Effects of two Bacillus velezensis strains isolated from different sources on the growth of Capsicum annum

Provisionally accepted
Bao Wang Bao Wang 1Shimeng Tan Shimeng Tan 1*Mingde Wu Mingde Wu 2Yujie Feng Yujie Feng 1*Wanrong Yan Wanrong Yan 1*Qian Yun Qian Yun 1*Xuncong Ji Xuncong Ji 1*Runmao Lin Runmao Lin 3*Zhixiang Zhao Zhixiang Zhao 1*
  • 1 Hainan Academy of Agricultural Sciences, Haikou, Hainan Province, China
  • 2 Huazhong Agricultural University, Wuhan, Hubei Province, China
  • 3 Hainan University, Haikou, Hainan Province, China

The final, formatted version of the article will be published soon.

    Microbial inoculants offer an environmentally friendly approach to enhance plant growth and control disease. In this study, two Bacillus velezensis strains, HKSSLJEBR3 (R3) and Ya-1 were isolated from pepper plant roots and tropical rainforest soil, respectively. Both strains exhibited strong antifungal activity against Fusarium oxysporum f. sp. capsici, with inhibition rates of 48.54 ± 0.66% for R3 and 49.35 ± 1.44% for Ya-1. In greenhouse trials, R3 significantly boosted pepper growth, with a 22.12% increase in plant height, 46.44% more leaves, and 56.29% greater fresh weight. These enhancements were likely due to the strong affinity between R3 and pepper plants. Both strains also improved soil quality, with R3 increasing available potassium (AK) by 5.13% and soil organic matter (SOM) by 4.03%, while Ya-1 showed more significant increases. Metagenomic analysis revealed that both strains altered the rhizosphere microbiome, with R3 promoting Pseudomonas and suppressing Fusarium. These results suggest that the R3 strain has strong potential for enhancing pepper growth, improving soil health, and reshaping the rhizosphere microbiome.

    Keywords: Bacillus velezensis, Antifungal activity, biological control, Plant growth-promoting microorganisms, soil rhizosphere community, Metagenomic

    Received: 01 Oct 2024; Accepted: 27 Nov 2024.

    Copyright: © 2024 Wang, Tan, Wu, Feng, Yan, Yun, Ji, Lin and Zhao. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Shimeng Tan, Hainan Academy of Agricultural Sciences, Haikou, Hainan Province, China
    Yujie Feng, Hainan Academy of Agricultural Sciences, Haikou, Hainan Province, China
    Wanrong Yan, Hainan Academy of Agricultural Sciences, Haikou, Hainan Province, China
    Qian Yun, Hainan Academy of Agricultural Sciences, Haikou, Hainan Province, China
    Xuncong Ji, Hainan Academy of Agricultural Sciences, Haikou, Hainan Province, China
    Runmao Lin, Hainan University, Haikou, 570228, Hainan Province, China
    Zhixiang Zhao, Hainan Academy of Agricultural Sciences, Haikou, Hainan Province, China

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