Analysis of Bacterial Community Changes in Apple Trees Treated with Bacillus altitudinis KPB25, a Potential Biological Control Agent against Fire Blight.

IF 2.5 3区 农林科学 Q2 PLANT SCIENCES
Na Ra Lim, Hyun Gi Kong, Eon Jin Jo, Min Kyu Kang, Duck Hwan Park
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Abstract

The balance of microbial communities in an ecosystem is the most important factor representing its healthy state, even when immigrant microorganisms, such as biological control agent, are introduced into agricultural fields. Thus, this study aimed to investigate the potential of the antagonistic bacterium KPB25 (Bacillus altitudinis) as a biological control agent against fire blight by analyzing the changes in the epiphytic and endophytic bacterial communities of apple tree leaves following treatment. The KPB25 treatment resulted in increased community richness and diversity in endophytic bacteria. Conversely, in epiphytic bacteria, community diversity decreased after treatment. Beta-diversity analysis revealed that the endophytic community formed distinct clusters following KPB25 treatment, indicating a shift in the community structure. Relative abundance analysis of the endophytic and epiphytic communities highlighted that some bacterial families, which increased in abundance following KPB25 treatment, oxidized sugars into organic acids or produced antibiotics, potentially creating an environment that makes it difficult for Erwinia amylovora to survive when attempting to infect its host. These findings suggest that KPB25 interacts with certain microbial taxa within apple trees, contributing to the regulation and alteration of the microbial community in a manner that promotes an environment unfavorable for E. amylovora. Overall, KPB25 may have enhanced certain microbial groups within the endophytic residual bacterial community of apple leaves that contribute to fire blight suppression, with minor structural changes but significant shifts in microbial diversity.

应用高海拔芽孢杆菌KPB25防治苹果树火枯病的细菌群落变化分析
生态系统中微生物群落的平衡是反映生态系统健康状态的最重要因素,即使在引入生物防治剂等外来微生物时也是如此。因此,本研究旨在通过分析苹果叶片附生和内生细菌群落的变化,探讨拮抗细菌KPB25 (Bacillus altiudinis)作为火疫病生物防治剂的潜力。KPB25处理增加了植物内生细菌的丰富度和多样性。相反,附生细菌的群落多样性在处理后呈下降趋势。β -多样性分析表明,KPB25处理后,植物内生群落形成了不同的集群,表明群落结构发生了变化。内生菌群和附生菌群的相对丰度分析强调,KPB25处理后丰度增加的一些细菌家族,将糖氧化成有机酸或产生抗生素,可能创造一个环境,使淀粉状欧米茄菌在试图感染宿主时难以生存。这些结果表明,KPB25与苹果树内的某些微生物类群相互作用,促进了微生物群落的调节和改变,从而促进了不利于淀粉样芽孢杆菌生长的环境。总体而言,KPB25可能增强了苹果叶片内生残余细菌群落中某些有助于抑制火枯病的微生物群,其结构变化较小,但微生物多样性发生了显著变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Plant Pathology Journal
Plant Pathology Journal 生物-植物科学
CiteScore
4.90
自引率
4.30%
发文量
71
审稿时长
12 months
期刊介绍: Information not localized
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