CLC number: S823
On-line Access: 2015-08-04
Received: 2015-01-13
Revision Accepted: 2015-05-15
Crosschecked: 2015-07-09
Cited: 0
Clicked: 4113
Chun-lei Yang, Le-luo Guan, Jian-xin Liu, Jia-kun Wang. Rumen fermentation and acetogen population changes in response to an exogenous acetogen TWA4 strain and Saccharomyces cerevisiae fermentation product[J]. Journal of Zhejiang University Science B, 2015, 16(8): 709-719.
@article{title="Rumen fermentation and acetogen population changes in response to an exogenous acetogen TWA4 strain and Saccharomyces cerevisiae fermentation product",
author="Chun-lei Yang, Le-luo Guan, Jian-xin Liu, Jia-kun Wang",
journal="Journal of Zhejiang University Science B",
volume="16",
number="8",
pages="709-719",
year="2015",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B1500013"
}
%0 Journal Article
%T Rumen fermentation and acetogen population changes in response to an exogenous acetogen TWA4 strain and Saccharomyces cerevisiae fermentation product
%A Chun-lei Yang
%A Le-luo Guan
%A Jian-xin Liu
%A Jia-kun Wang
%J Journal of Zhejiang University SCIENCE B
%V 16
%N 8
%P 709-719
%@ 1673-1581
%D 2015
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1500013
TY - JOUR
T1 - Rumen fermentation and acetogen population changes in response to an exogenous acetogen TWA4 strain and Saccharomyces cerevisiae fermentation product
A1 - Chun-lei Yang
A1 - Le-luo Guan
A1 - Jian-xin Liu
A1 - Jia-kun Wang
J0 - Journal of Zhejiang University Science B
VL - 16
IS - 8
SP - 709
EP - 719
%@ 1673-1581
Y1 - 2015
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1500013
Abstract: The presence of yeast cells could stimulate hydrogen utilization of acetogens and enhance acetogenesis. To understand the roles of acetogens in rumen fermentation, an in vitro rumen fermentation experiment was conducted with addition of acetogen strain (TWA4) and/or Saccharomyces cerevisiae fermentation product (XP). A 2×2 factorial design with two levels of TWA4 (0 or 2×107 cells/ml) and XP (0 or 2 g/L) was performed. Volatile fatty acids (VFAs) were increased (P<0.05) in XP and TWA4XP, while methane was increased only in TWA4XP (P<0.05). The increase rate of microorganisms with formyltetrahydrofolate synthetase, especially acetogens, was higher than that of methanogens under all treatments. Lachnospiraceae was predominant in all acetogen communities, but without close acetyl-CoA synthase (ACS) amino acid sequences from cultured isolates. Low-Acetitomaculum ruminis-like ACS was predominant in all acetogen communities, while four unique phylotypes in XP treatment were all amino acid identified low-Eubacterium limosum-like acetogens. It differs to XP treatment that more low-A. ruminis-like and less low-E. limosum-like sequences were identified in TWA4 and TWA4XP treatments. Enhancing acetogenesis by supplementation with an acetogen strain and/or yeast cells may be an approach to mitigate methane, by targeting proper acetogens such as uncultured low-E. limosum-like acetogens.
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