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在生菜叶囊中Salmonella enterica分离物之间存在种内竞争
Cristián Jacob1, Joseph Student2,3, David F Bridges2,4
1Departamento de Ciencias Vegetales, Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Santiago, Chile.
Frontiers in plant science
|February 14, 2024
概括
沙门氏菌 (Salmonella enterica) 菌株在生存和在生菜叶中竞争的能力方面存在显著差异,这影响了食品安全. 了解这些差异是防止新鲜产品污染的关键.
科学领域:
- 微生物学 微生物学
- 植物病理学 植物病理学
- 食品安全 食品安全
背景情况:
- 沙门氏菌 (Salmonella enterica) 可以在生菜上持续存在,从而构成食品安全风险.
- 细菌和植物的变异影响了沙门氏菌在树叶上的殖民.
- 沙门氏菌在叶子上持久的机制尚不清楚.
研究的目的:
- 为了评估不同类型的沙门氏菌 (Salmonella enterica) 在生菜中分离的叶状适应性.
- 为了研究沙门氏菌在生菜的生存和竞争能力.
- 探索营养利用和免疫逃避如何促进沙门氏菌叶状健康.
主要方法:
- 有遗传条形码的Salmonella enterica分离物 (10种血清物) 入了生菜叶中.
- 细菌种群在注射后0天和10天被列举,以计算净增长.
- 通过分析聚合感染中的条形码丰度变化来评估竞争.
- 通过生菜的apoplast代谢物增长和活性氧物种诱导,进一步评估了apoplast适应性.
主要成果:
- 在沙门氏菌 (Salmonella enterica) 隔离物中观察到生存率和竞争能力的显著变化.
- 不同的叶子健康与利用芽细胞营养素的能力相关.
- 逃避菜植物的活性氧物种免疫反应也与差异性健康有关.
结论:
- 单独的沙门氏菌 (Salmonella enterica) 呈现出独特的生存能力,并在生菜叶的芽细胞中竞争.
- 营养素的可用性和植物免疫系统的相互作用是影响沙门氏菌叶状健康的关键因素.
- 这些发现强调了沙门氏菌菌株水平变化的重要性,以了解和减轻食品污染风险.
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