Title Diversity of Bovine Rumen Methanogens In Vitro in the Presence of Condensed Tannins, as Determined by Sequence Analysis of 16S rRNA Gene Library
Author Hui Yin Tan1, Chin Chin Sieo1,2, Chin Mei Lee1, Norhani Abdullah1,2, Juan Boo Liang1, and Yin Wan Ho1*
Address 1Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia, 2Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia
Bibliography Journal of Microbiology, 49(3),492-498, 2011,
Key Words condensed tannins, methanogens, bovine rumen fluid, rumen archaeal diversity, gene library
Abstract Molecular diversity of rumen archaeal populations from bovine rumen fluid incubated with or without condensed tannins was investigated using 16S rRNA gene libraries. The predominant order of rumen archaea in the 16S rRNA gene libraries of the control and condensed tannins treatment was found to belong to a novel group of rumen archaea that is distantly related to the order Thermoplasmatales, with 59.5% (15 phylotypes) and 81.43% (21 phylotypes) of the total clones from the control and treatment clone libraries, respectively. The 16S rRNA gene library of the control was found to have higher proportions of methanogens from the orders Methanomicrobiales (32%) and Methanobacteriales (8.5%) as compared to those found in the condensed tannins treatment clone library in both orders (16.88% and 1.68% respectively). The phylotype distributed in the order Methanosarcinales was only found in the control clone library. The study indicated that condensed tannins could alter the diversity of bovine rumen methanogens.