Role of Age-Related Shifts in Rumen Bacteria and Methanogens in Methane Production in Cattle
文献类型： 外文期刊
作者：
Liu, Chong
1
;
Meng, Qinghui
1
;
Chen, Yongxing
1
;
Xu, Mengsi
2
;
Shen, Min
2
;
Gao, Rui
3
;
Gan, Shangquan
2
;
作者机构： 1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing, Peoples R China
2.Xinjiang Acad Agr & Reclamat Sci, State Key Lab Sheep Genet Improvement & Hlth Prod, Shihezi, Peoples R China
3.Shihezi Univ, Sch Med, Key Lab Xinjiang Endem & Ethn Dis, Shihezi, Peoples R China
4.Shihezi Univ, Sch Med, Dept Biochem, Shihezi, Peoples R China
关键词： enteric methane production;rumen microbiota;dairy cow;age-related microbiota;high-throughput sequencing
期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.64； 五年影响因子：6.32 ）
ISSN： 1664-302X
年卷期： 2017 年 8 卷
页码：
收录情况： SCI
摘要： Rumen microbiota are essential for maintaining digestive and metabolic functions, producing methane as a byproduct. Dairy heifers produce large amounts of methane based on fermentation of digested organic matter, with adverse consequences for feed efficiency and the environment. It is therefore important to understand the influence of host age on the relationship between microbiota and methane production. This study explored the age effect on the relationship between microbial communities and enteric methane production in dairy cows and heifers using high-throughput sequencing. Methane production and volatile fatty acid concentrations were age-related. Heifers (9-10 months) had lower methane production but higher methane production per dry matter intake (DMI). The acetate: propionate ratio decreased significantly with increasing age. Age-related microbiota changes in the rumen were reflected by a significant shift in bacterial taxa, but relatively stable archaeal taxa. Prevotella, Ruminococcus, Flavonifractor, Succinivibrio, and Methanobrevibacter were affected by age. This study revealed different associations between predominant bacterial phylotypes and Methanobrevibacter with increasing age. Prevotella was strongly correlated with Methanobrevibacter in heifers; howerver, in older cows (96-120 months) this association was replaced by a correlation between Succinivibrio and Methanobrevibacter. This shift may account for the age-related difference in rumen fermentation and methane production per DMI.
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