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揭示土壤微生物对宏素A的反应:一项转基因学研究

Darya V Poshvina¹, Alexander S Balkin², Diana S Dilbaryan¹

¹Laboratory of Antimicrobial Resistance, Institute of Environmental and Agricultural Biology (X-BIO), University of Tyumen, Tyumen, Russian Federation.

|August 20, 2025

概括

来自有益细菌的麦克罗拉克A (McA) 改变了土壤微生物和抗生素耐药性基因 (ARG). 低剂量促进排泄和运动,而高剂量诱导防御基因,影响生物控制剂的安全性.

科学领域:

环境微生物学
土壤科学
生物技术

背景情况:

可持续的作物保护依赖于了解生物制剂对微生物的影响.
一种来自Bacillus velezensis的多基基抗生素Macrolactin A (McA) 是植物健康的关键.
评估McA对土壤微生物群落和抗生素耐药性基因 (ARG) 的影响至关重要.

研究的目的:

研究麦克罗拉克A (McA) 如何影响土壤微生物群落.
分析McA对抗生素耐药性基因 (ARG) 概况的影响.
确定麦卡对土壤生态系统的剂量依赖性影响.

主要方法:

使用高吞吐量元基因组学和网络分析.
未经处理的土壤与低 (1 mg/kg) 和高 (10 mg/kg) 的土壤进行了比较.
进行了分类学,抗体和功能基因分析 (COG).

主要成果:

这导致了显著的分类学变化, Pseudomonadota 增加, Actinomycetota 减少.
ARG多样性保持稳定,但McA因特定的耐药性机制而受到剂量依赖的选择 (排泄,无活化).
网络分析显示ARG与宿主之间的关联被破坏,有利于具有流线性抗体的细菌.

结论:

麦克罗拉克A表现出双相选择:低剂量有利于避免 (流量/流动性),高剂量促进防御策略.
作为生态系统工程师, 影响微生物群落和ARG.
评估抗体重组对于生物控制剂风险评估至关重要.

关键词:

抗生素耐药性基因巴西菌埃尔法米化物土壤健康土壤微生物群落

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