AIMS: To investigate the relationship between ruminal methanogen community and host enteric methane (CH(4) ) production in lactating dairy cows fed diets supplemented with an exogenous fibrolytic enzyme additive. METHODS AND RESULTS: Ecology of ruminal methanogens from dairy cows fed with or without exogenous fibrolytic enzymes was examined using PCR-denaturing gradient gel electrophoresis (PCR-DGGE) analyses and quantitative real-time PCR (qRT-PCR). The density of methanogens was not affected by the enzyme additive or sampling times, and no relationship was observed between the total methanogen population and CH(4) yield (as g per head per day or g kg(-1) DMI). The PCR-DGGE profiles consisted of 26 distinctive bands, with two bands similar to Methanogenic archaeon CH1270 negatively correlated, and one band similar to Methanobrevibacter gottschalkii strain HO positively correlated, with CH(4) yield. Three bands similar to Methanogenic archaeon CH1270 or Methanobrevibacter smithii ATCC 35061 appeared after enzyme was added. CONCLUSIONS: Supplementing a dairy cow diet with an exogenous fibrolytic enzyme additive increased CH(4) yield and altered the composition of the rumen methanogen community, but not the overall density of methanogens. SIGNIFICANCE AND IMPACT OF THE STUDY: This is the first study to identify the correlation between methanogen ecology and host CH(4) yield from lactating dairy cows.
AIMS: To investigate the relationship between ruminal methanogen community and host enteric methane (CH(4) ) production in lactating dairy cows fed diets supplemented with an exogenous fibrolytic enzyme additive. METHODS AND RESULTS: Ecology of ruminal methanogens from dairy cows fed with or without exogenous fibrolytic enzymes was examined using PCR-denaturing gradient gel electrophoresis (PCR-DGGE) analyses and quantitative real-time PCR (qRT-PCR). The density of methanogens was not affected by the enzyme additive or sampling times, and no relationship was observed between the total methanogen population and CH(4) yield (as g per head per day or g kg(-1) DMI). The PCR-DGGE profiles consisted of 26 distinctive bands, with two bands similar to Methanogenic archaeon CH1270 negatively correlated, and one band similar to Methanobrevibacter gottschalkii strain HO positively correlated, with CH(4) yield. Three bands similar to Methanogenic archaeon CH1270 or Methanobrevibacter smithii ATCC 35061 appeared after enzyme was added. CONCLUSIONS: Supplementing a dairy cow diet with an exogenous fibrolytic enzyme additive increased CH(4) yield and altered the composition of the rumen methanogen community, but not the overall density of methanogens. SIGNIFICANCE AND IMPACT OF THE STUDY: This is the first study to identify the correlation between methanogen ecology and host CH(4) yield from lactating dairy cows.
Authors: Zhi Peng Li; Han Lu Liu; Chun Ai Jin; Xue Zhe Cui; Yi Jing; Fu He Yang; Guang Yu Li; André-Denis G Wright Journal: Microb Ecol Date: 2013-09-24 Impact factor: 4.552
Authors: Alejandro Salgado-Flores; Live H Hagen; Suzanne L Ishaq; Mirzaman Zamanzadeh; André-Denis G Wright; Phillip B Pope; Monica A Sundset Journal: PLoS One Date: 2016-05-09 Impact factor: 3.240
Authors: Mohammad Faseleh Jahromi; Juan Boo Liang; Rosfarizan Mohamad; Yong Meng Goh; Parisa Shokryazdan; Yin Wan Ho Journal: Biomed Res Int Date: 2013-01-15 Impact factor: 3.411