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

文献类型： 外文期刊

作者： Wang, Bao 1 ; Tan, Shimeng 1 ; Wu, Mingde 5 ; Feng, Yujie 1 ; Yan, Wanrong 1 ; Yun, Qian 1 ; Ji, Xuncong 1 ; Lin, Runmao 2 ; Zhao, Zhixiang 1 ;

作者机构： 1.Hainan Acad Agr Sci, Inst Plant Protect Acad Agr Sci, Res Ctr Qual Safety & Stand Agr Prod, Key Lab Plant Dis & Pest Control Hainan Prov, Haikou, Peoples R China

2.Hainan Univ, Sanya Inst Breeding & Multiplicat, Sch Breeding & Multiplicat, Key Lab Green Prevent & Control Trop Plant Dis & P, Haikou, Peoples R China

3.Hainan Univ, Sanya Inst Breeding & Multiplicat, Sch Breeding & Multiplicat, Key Lab Green Prevent & Control Trop Plant Dis & P, Sanya, Peoples R China

4.Hainan Univ, Sch Life & Hlth Sci, Haikou, Peoples R China

5.Huazhong Agr Univ, Key Lab Plant Pathol Hubei Prov, Wuhan, Peoples R China

关键词： Bacillus velezensis; antifungal activity; biological control; plant growth-promoting microorganisms; soil rhizosphere community; metagenomic

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：4.5； 五年影响因子：5.2 ）

ISSN：

年卷期： 2024 年 15 卷

页码：

收录情况： SCI

摘要： 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.

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