粘液碳水化合物含量的季节性和发育阶段变化塑造了鱼微生物群
Chance J English1,2, Meenakshi Manoj1, Lillian C Henderson1
1Marine Science Institute, University of California, Santa Barbara, Santa Barbara, CA 93106, United States.
ISME communications
|November 26, 2025
概括
巨型海藻释放溶解的有机物质,塑造其微生物组. 粘液成分因季节性变化和海藻发育而变化,影响细菌群落及其功能.
科学领域:
- 海洋生物学 海洋生物学
- 微生物生态学 微生物生态学
- 生物地质化学生物地质化学
背景情况:
- 光自营养生物释放出大量的溶解有机物质,形成表面粘液层,影响它们周围的环境和微生物群.
- 这种粘液层的组成是动态的,可以受到各种因素的影响,包括营养的可用性和生物体的生命阶段.
研究的目的:
- 研究巨型海藻 (Macrocystis pyrifera) 粘液碳水化合物组成及其相关微生物组之间的关系.
- 了解季节性营养的可用性和发育阶段如何影响海藻的粘液及其微生物群落结构.
主要方法:
- 16S rRNA amplicon测序被用于分析巨型海藻微生物组.
- 对海藻粘液进行了碳水化合物单体分析,以确定其成分.
- 基因组分析和生长试验是在孤立的细菌上进行的.
主要成果:
- 在季节和发育阶段之间观察到微生物组和粘液组成的显著差异.
- 春季较高的含量与粘液中葡萄糖胺的增加相关,而衰老释放的曼努伦酸.
- 特定的粘液成分 (葡萄糖胺,糖,曼努龙酸) 与不同细菌系 (植物菌群,菌群,蛋白细菌) 的相对丰富程度有关.
- 一个孤立的Planctomycetota成员使用了fucoidan和N-乙葡萄糖胺,与其丰富度与藻粘液成分相关.
结论:
- 巨型海藻粘液碳水化合物成分在结构化其相关微生物群中起着至关重要的作用.
- 这些发现表明,海藻排泄物和微生物社区组合之间存在动态相互作用,类似于在珊瑚和人类肠道中观察到的模式.
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