Bacterial detoxification of saponins in the crop of the avian foregut fermenter Opisthocomus hoazin
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Laboratory of Gastrointestinal Physiology, BBC, Venezuelan Institute of Scientific Research Caracas, AP 2182, 1020A Venezuela San Juan PR 00931, USA
Department of Mathematics, University of Puerto Rico, San Juan PR00931, USA
Department of Biology, University of Puerto Rico, San Juan, PR 00931, USA
Publication date: 2007-09-17
Corresponding author
M. A. García-Amado   

Laboratory of Gastrointestinal Physiology, BBC, Venezuelan Institute of Scientific Research Caracas, AP 2182, 1020A Venezuela San Juan PR 00931, USA
J. Anim. Feed Sci. 2007;16(Suppl. 2):82–85
The hoatzin is a folivorous bird with microbial fermentation in the crop that consumes plants that contain saponins. We investigated detoxification activity of saponins by bacteria from the hoatzin crop, and how this activity was affected in the presence of methanogens. Strains and mixed cultures were grown in presence of 200 μg·ml-1 Quillaja saponins. Detoxification was determined as loss of haemolytic activity. The methanogenesis was inhibited added bromoethanesulphonic acid (BES). Mixed cultures showed higher rate of saponin detoxification than strains and it was reduced by BES. The hoatzin bacteria detoxify saponins, and methanogenic Archaea might act as a hydrogen sink.
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