Dietary selection of metabolically distinct microorganisms drives hydrogen metabolism in ruminants

Autor: Qiu Shuang Li, Rong Wang, Zhi Yuan Ma, Xiu Min Zhang, Jin Zhen Jiao, Zhi Gang Zhang, Emilio M. Ungerfeld, Kang Le Yi, Bai Zhong Zhang, Liang Long, Yun Long, Ye Tao, Tao Huang, Chris Greening, Zhi Liang Tan, Min Wang
Rok vydání: 2022
Předmět:
Zdroj: The ISME Journal. 16:2535-2546
ISSN: 1751-7370
1751-7362
DOI: 10.1038/s41396-022-01294-9
Popis: Ruminants are important for global food security but emit the greenhouse gas methane. Rumen microorganisms break down complex carbohydrates to produce volatile fatty acids and molecular hydrogen. This hydrogen is mainly converted into methane by archaea, but can also be used by hydrogenotrophic acetogenic and respiratory bacteria to produce useful metabolites. A better mechanistic understanding is needed on how dietary carbohydrates influence hydrogen metabolism and methanogenesis. We profiled the composition, metabolic pathways, and activities of rumen microbiota in 24 beef cattle adapted to either fiber-rich or starch-rich diets. The fiber-rich diet selected for fibrolytic bacteria and methanogens resulting in increased fiber utilization, while the starch-rich diet selected for amylolytic bacteria and lactate utilizers, allowing the maintenance of a healthy rumen and decreasing methane production (p p p
Databáze: OpenAIRE
Externí odkaz: