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Degradation of euptox A by tannase‐producing rumen bacteria from migratory goats
Author(s) -
Sharma D.,
Mal G.,
Kannan A.,
Bhar R.,
Sharma R.,
Singh B.
Publication year - 2017
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/jam.13563
Subject(s) - rumen , tannase , bacteria , biology , microbiology and biotechnology , food science , stenotrophomonas , fermentation , pseudomonas , biochemistry , gallic acid , genetics , antioxidant
Aims The gut microbiota capable of degrading plant biomass and antinutritional phytometabolites are of immense importance. This study reports isolation and characterization of tannase‐producing rumen bacteria that could also degrade euptox A (9‐oxo‐10,11‐dehydroageraphorone) present in Eupatorium adenophorum (Spreng). Methods and Results Migratory Gaddi goats were selected as source of inoculums for isolating rumen bacteria with ability to produce tannase which catalyses degradation of hydrolysable tannins ( HT s). Three rumen bacterial isolates producing tannase were studied, and identified as Klebsiella variicola strain PLP G‐17 LC , K. variicola strain PLP S‐18 and Klebsiella pneumoniae strain PLP G‐17 SC . The isolates exhibited optimal tannase activity at 40°C, and pH 6·0. The bacteria could also degrade euptox A, a potent hepatotoxin in E. adenophorum Spreng, a widely distributed noxious weed. Conclusions The rumen bacteria could degrade antinutritional HT s and euptox A. Culture‐independent metagenomic interventions are envisioned to completely decipher the rumen microbial ecology and exploit its genetic and metabolic potential. Significance and Impact of the Study The bacteria producing tannase which catalyses degradation of HT s, and concurrently degrading euptox A, may have potential as microbial feed additives to increase utilization of plant biomass containing antinutritional phytometabolites.