Article (Scientific journals)
Insights into abundant rumen ureolytic bacterial community using rumen simulation system
Jin, Di; Zhao, Shengguo; Wang, Pengpeng et al.
2016In Frontiers in Microbiology, 7 (1006)
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Keywords :
Rumen; Ureolytic bacteria; acetohydroxamic acid; high-throughput sequencing
Abstract :
[en] Urea, a non-protein nitrogen for dairy cows, is rapidly hydrolyzed to ammonia by urease produced by ureolytic bacteria in the rumen, and the ammonia is used as nitrogen for rumen bacterial growth. However, there is limited knowledge with regard to the ureolytic bacteria community in the rumen. To explore the ruminal ureolytic bacterial community, urea, or acetohydroxamic acid (AHA, an inhibitor of urea hydrolysis) were supplemented into the rumen simulation systems. The bacterial 16S rRNA genes were sequenced by Miseq high-throughput sequencing and used to reveal the ureoltyic bacteria by comparing different treatments. The results revealed that urea supplementation significantly increased the ammonia concentration, and AHA addition inhibited urea hydrolysis. Urea supplementation significantly increased the richness of bacterial community and the proportion of ureC genes. The composition of bacterial community following urea or AHA supplementation showed no significant difference compared to the groups without supplementation. The abundance of Bacillus and unclassified Succinivibrionaceae increased significantly following urea supplementation. Pseudomonas, Haemophilus, Neisseria, Streptococcus, and Actinomyces exhibited a positive response to urea supplementation and a negative response to AHA addition. Results retrieved from the NCBI protein database and publications confirmed that the representative bacteria in these genera mentioned above had urease genes or urease activities. Therefore, the rumen ureolytic bacteria were abundant in the genera of Pseudomonas, Haemophilus, Neisseria, Streptococcus, Actinomyces, Bacillus, and unclassified Succinivibrionaceae. Insights into abundant rumen ureolytic bacteria provide the regulation targets to mitigate urea hydrolysis and increase efficiency of urea nitrogen utilization in ruminants.
Research center :
TERRA Teaching and Research Centre - TERRA
Disciplines :
Animal production & animal husbandry
Author, co-author :
Jin, Di;  Institue of Animal Science - CAAS
Zhao, Shengguo;  Institue of Animal Science - CAAS
Wang, Pengpeng;  Institue of Animal Science - CAAS
Zheng, Nan;  Institue of Animal Science - CAAS
Bu, Dengpan;  Institue of Animal Science - CAAS
Beckers, Yves  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Zootechnie
Wang, Jiaqi;  Institue of Animal Science - CAAS
Language :
English
Title :
Insights into abundant rumen ureolytic bacterial community using rumen simulation system
Publication date :
2016
Journal title :
Frontiers in Microbiology
eISSN :
1664-302X
Publisher :
Frontiers Research Foundation, Lausanne, Switzerland
Volume :
7
Issue :
1006
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
NSCF - National Natural Science Foundation of China [CN]
Agricultural Science and Technology Innovation Program
Modern Agro-Industry Technology Research System of the PR China
Terra Research Centre - AgricultureIsLife
Available on ORBi :
since 14 July 2016

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