1123-反刍动物肠道微生物群中的潜在角叉菜胶代谢性状 episode artwork

EPISODE · Jun 13, 2026 · 13 MIN

1123-反刍动物肠道微生物群中的潜在角叉菜胶代谢性状

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该研究揭示了反刍动物肠道微生物群中存在一种广泛分布且隐性的红藻卡拉胶(carrageenan)降解特性。通过对食用红藻的牛进行功能宏基因组学和元蛋白质组学分析,研究人员鉴定出了专门负责卡拉胶代谢的多糖利用位点(CarPULs)及关键的GH16家族卡拉胶酶。实验证明,拟杆菌属(Bacteroides)成员在后肠中通过这些途径高效降解海藻多糖,且这种能力在不同地理区域的多种偶蹄目动物中均有发现。尽管这些微生物途径在结构上与海洋细菌不同,但它们赋予了宿主在饮食变化时快速适应海藻饲料的能力。这项发现不仅拓展了对肠道微生物“暗物质”功能的认知,还为开发可持续的农业饲料和减少反刍动物温室气体排放提供了生物学基础。References:Tingley J P, Andersen T O, Mihalynuk L G, et al. Distribution of microbial carrageenan foraging pathways reveals a widespread latent trait within the ruminant intestinal microbiome[J]. Nature Communications, 2026, 17(1): 4237.前往小宇宙评论区与主播互动

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1123-反刍动物肠道微生物群中的潜在角叉菜胶代谢性状

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