Journal of Microbiology

Research Support, Non-U.S. Gov'ts

NOTE] Anaerobic Cellulolytic Rumen Fungal Populations in Goats Fed with and without Leucaena leucocephala Hybrid, as Determined by Real-Time PCR: Ching Mun Kok , Chin Chin Sieo , Hui Yin Tan , Wan Zuhainis Saad , Juan Boo Liang , Yin Wan Ho; J. Microbiol. 2013;51(5):700-703. Published online October 31, 2013; DOI: https://doi.org/10.1007/s12275-013-2540-z

Abstract: The effect of Leucaena leucocephala hybrid-Bahru (LLB), which contains a high concentration of condensed tannins, on cellulolytic rumen fungal population in goats was investigated using real-time PCR. The fungal population in goats fed LLB was inhibited during the first 10 days of feeding, but after 15 days of feeding, there was a tremendous increase of fungal population (157.0 μg/ml), which was about fourfold more than that in control goats (39.7 μg/ml). However, after this period, the fungal population decreased continuously, and at 30 days of feeding, the fungal population (50.6 μg/ml) was not significantly different from that in control goats (55.4 μg/ml).

Diversity of Bovine Rumen Methanogens In Vitro in the Presence of Condensed Tannins, as Determined by Sequence Analysis of 16S rRNA Gene Library: Hui Yin Tan , Chin Chin Sieo , Chin Mei Lee , Norhani Abdullah , Juan Boo Liang , Yin Wan Ho; J. Microbiol. 2011;49(3):492-498. Published online June 30, 2011; DOI: https://doi.org/10.1007/s12275-011-0319-7

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.

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