微生物生物膜作为干旱盾牌:Bacillus velezensis D103通过水素调节提高了玉米的耐受性
Yating Zhang1, Ning Zhang2, Zhiyong Zhang3
1College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China; College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China.
Microbiological research
|December 27, 2025
概括
来自Bacillus velezensis D103的细菌生物膜通过调节水素 (AQP) 和改善根水运输来提高玉米的干旱耐受性. 生物膜对于PGPR介导的弹性和微生物群适应是至关重要的.
科学领域:
- 微生物生态学 微生物生态学
- 植物生理学 植物生理学
- 农业科学 农业科学
背景情况:
- 干旱压力在全球范围内限制了作物产量.
- 促进植物生长的草原细菌 (PGPR) 可以提高植物对干旱的耐受性.
- 在干旱耐受性中PGPR生物膜形成的作用尚不清楚.
研究的目的:
- 调查Bacillus velezensis D103生物膜形成在使玉米具有抗旱能力方面的作用.
- 阐明生物膜增强干旱耐受性的机制,重点关注水蛋白调节和根球微生物群.
主要方法:
- 评估了玉米根排泄物对干旱下D103生物膜形成的影响.
- 分析了根植殖和根球微生物组的变化.
- 利用病毒诱导的基因沉默来研究水蛋白的功能 (ZmPIP2;6,ZmTIP1;1).
主要成果:
- 在干旱期间,玉米根排泄物促进了D103生物膜的形成.
- 生物膜的形成对于根植殖是必不可少的,并且改变了树根球微生物群.
- 生物膜上调了玉米水素ZmPIP2;6和ZmTIP1;1,提高了水上运输.
- ZmPIP2;6对于D103介导的干旱耐受性是不可或缺的.
结论:
- 细菌生物膜的形成是玉米中PGPR介导干旱耐受性的关键机制.
- 生物膜协调水素的表达,微生物组的组合和土壤的保留水,以提高弹性.
- 这些发现为开发用于易遭受干旱的农业的微生物注射剂提供了基础.
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