种子老化增加了本地微生物对发芽的影响
Thomas Roach1, Moritz Stegner1, David Clara1
1Department of Botany, University of Innsbruck, Austria.
Microbiological research
|March 15, 2026
概括
由于不适当的储存而导致的种子老化会改变真菌群落,增加对病原体的敏感性. 某些内性细菌,如Bacillus toyonensis C55,可以减轻对大豆发芽的这些负面影响.
科学领域:
- 农业科学 农业科学
- 微生物学 微生物学
- 植物科学 植物科学
背景情况:
- 种子质量受到不适当的储存条件 (高温,湿度) 的损害,加速老化.
- 种子衰老对微生物组和随后的发芽性能的影响尚不清楚.
研究的目的:
- 研究老化大豆种子如何影响真菌群落,新陈代谢和对真菌的发芽敏感性.
- 评估内性细菌在老化的种子中控制病原菌的作用.
主要方法:
- 大豆种子在45°C和75%RH的温度下成熟.
- 使用安普利康序列分析分析了真菌群落.
- 评估了代谢物泄漏和真菌生长.
- 内生菌细菌在体外和体内都进行了抗真菌活性测试.
- 光在位杂交显微镜被用于可视化细菌殖民.
主要成果:
- 老龄化减少了真菌的丰富性,改变了社区结构.
- 特定的真菌抑制了老化或不老化的种子的发芽.
- 衰老增加了代谢物泄漏,促进了真菌生长.
- 豆杆菌C55和B. pumilusAM26显示出抗真菌活性.
- B. toyonensis C55改善了老种子的发芽,而B. pumilus AM26没有.
- 衰老过程中的氧化增加了对真菌病原体的敏感性,由细菌调节.
结论:
- 种子老化对种子微生物群产生重大影响,并增加对真菌病原体的敏感性.
- 内生菌细菌,特别是Bacillus toyonensis C55,可以在减轻老豆种子中的真菌感染方面发挥作用.
- 衰老期间的氧化应激是增加真菌病原体敏感性的关键因素.
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