核心共生体,接种时的年龄和饮食影响着常见的细菌病原体对熊蜂肠道的殖民
Annika S Nelson1,2, McKenna J Larson2, Tobin J Hammer2
1Department of Biology, Texas Christian University, Fort Worth, Texas, USA.
The Journal of animal ecology
|April 3, 2025
概括
非核心肠道细菌,如Serratia marcescens,在大黄蜂中很常见,并且可能具有病原性. 核心肠道微生物群和早期生命暴露影响殖民,影响蜜蜂的健康和繁殖.
科学领域:
- 细菌学 细菌学是一门学科.
- 昆虫病理学 昆虫病理学
- 微生物生态学 微生物生态学
背景情况:
- 微生物显著影响大黄蜂的健康,研究往往侧重于核心肠道共生体或病原体.
- 非核心肠道细菌是可变的,非宿主特异的,代表熊蜂中不太了解的微生物群体.
- 了解非核心细菌对于熊蜂生态,保护和管理策略至关重要.
研究的目的:
- 研究野生大黄蜂 (Bombus impatiens) 中非核心肠道细菌的流行率和影响.
- 为了检查影响非核心细菌Serratia marcescens. bumblebee肠道殖民的因素.
- 评估Serratia marcescens感染对大黄蜂健康和寿命的影响.
主要方法:
- 在野生熊蜂工人中调查了非核心细菌的丰富性.
- 使用 gnotobiotic 熊蜂 (Bombus impatiens) 进行了实验室实验.
- 操纵了接种时间,核心微生物组的破坏,以及饮食 (混合与单花花粉) 来研究Serratia marcescens的殖民和影响.
主要成果:
- 非核心细菌,包括Serratia,在野生大黄蜂中经常丰富,约50%的个体具有≥10%的非核心细菌.
- 通过早期接种 (成年人出现后1天内) 和破坏核心肠道微生物群,增强了Serratia marcescens的殖民性.
- 与单花饮食相比,混合野花花粉饮食促进了较高的Serratia感染水平.
- 塞拉提亚感染显著减少了大黄蜂的寿命和总繁殖能力,特别是在肠道微生物组受损的蜜蜂中.
结论:
- 非核心细菌在野生大黄蜂中广泛存在,有些则充当机会性病原体.
- 核心肠道微生物组对于保护大黄蜂免受非核心细菌病原体的影响至关重要.
- 接种时的熊蜂年龄和食成分是调节细菌病原体殖民的关键因素.
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