The endophytic bacterium Bacillus subtilis R8 as a prospective biocontrol agent for managing tea blister blight and enhancing tea yield
内生菌枯草芽孢杆菌R8作为防治茶饼病和提高茶叶产量的潜在生防制剂
- 关键词：
- 来源：
- BioControl 期刊
- 类型：
- 学术文献
- 语种：
- 英语
- 原文发布日期：
- 2025-01-11
- 摘要：
- Blisterblight, caused by the fungus Exobasidium vexans, is a major disease affecting tea plants. Thisstudy aimed to isolate and evaluate the efficacy of endophytic bacterialstrains as potential biocontrol agents against the disease. Thirteen endophyticbacterial strains were isolated from healthy tea plants collected in ThachThat, Hanoi, Vietnam. Six of these strains exhibited antagonistic effectsagainst E. vexans, with strains R8 and S2 showing the highestinhibition. Heat-treated bacterial supernatants lost their antifungal activity,indicating that the inhibitory compounds were protein-based. Strain R8,identified as Bacillus subtilis, also demonstrated plant growth-promoting traits,including the production of Indole-3-acetic acid (IAA) and phosphatesolubilization. Greenhouse trials showed that both chemical fungicides andantagonistic bacteria significantly reduced disease incidence, with thepreventative application of chemical fungicide being the most effective(control efficacy of about 91.05%), followed by preventative inoculationwith antagonistic bacteria (82.77%). Additionally, treated plots yielded significantlymore fresh tea shoots, with an increase of 19.02% and 21.17% for antagonisticbacteria and chemical fungicide treatments, respectively, compared to thecontrol. These findings suggest that B. subtilis R8 holds promise as a biocontrol agent,providing both disease suppression and yield enhancement in tea cultivation.
- 所属专题：
- 60
