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Daniel Palberg¹, Emma Kaszecki¹, Chetan Dhanjal²

¹Environmental and Life Sciences Graduate Program, Trent University, 1600 West Bank Drive, Peterborough, ON, K9L 0G2, Canada.

BMC plant biology

|February 18, 2024

概括

商用草甘除草剂通过影响细胞生物质,对有益的植物细菌Methylobacterium造成伤害. 纯草甘没有影响,直到表面活性剂增加了细菌膜的透性,揭示了配方的毒性.

科学领域:

微生物学微生物学
植物科学植物科学
环境科学环境科学

背景情况:

甲基球菌细菌对于植物健康和耐压力至关重要.
草甘除草剂在全球范围内广泛用于农业.
草甘对像Methylobacterium这样的植物界微生物的影响需要调查.

研究的目的:

评估Methylobacterium菌株对草甘和基于草甘的除草剂 (GBH) 的敏感性.
探索由GBH配方诱导的潜在毒性机制.

主要方法:

测试了18种Methylobacterium菌株,使用修改的Kirby Bauer试验和液体培养.
研究了多酸盐-20 (Tween20) 表面活性剂在草甘毒性中的作用.
确定了GBH的最小抑制度,用于Methylobacterium的培养能力.

主要成果:

大多数Methylobacterium菌株对商业GBH配方 (WeatherMax®,Transorb®) 呈现敏感性.
纯草甘的影响是最小的,直到聚酸-20增加了膜的透性,减少了78-84%的生物质.
低度 (0.05% w/v) 的GBH抑制了Methylobacterium的培养能力.

结论:

商业GBH配方对植物圈中有益的Methylobacterium种群构成重大风险.
在GBH配方中的表面活性剂可能通过增加膜透性来增强草甘对细菌的毒性.
需要进一步的研究来了解GBH对植物相关微生物的生态影响.

关键词:

农业化学品农业化学品草甘是一种天然的草甘.生物圈 (Phyllosphere) 是一个生物圈.促进植物生长的细菌促进了植物生长.表面活性剂是一种表面活性剂.在Transorb®®中,我们可以看到.我们的天气Max®

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