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Tannic acid resistance in ruminal streptococcal isolates
Author(s) -
Goel Gunjan,
Puniya Anil Kumar,
Singh Kishan
Publication year - 2005
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.200410517
Subject(s) - tannic acid , tannin , tannase , rumen , chemistry , streptococcus , microbiology and biotechnology , food science , condensed tannin , bacteria , streptococcaceae , biology , biochemistry , polyphenol , botany , proanthocyanidin , antioxidant , fermentation , gallic acid , genetics , antibiotics
Tannin degrading isolates of Streptococcus spp. from rumen of non‐adaptive cattle, when grown in BHI broth, were able to tolerate tannic acid upto a level of 50 g/l. An increase in lag period from 1.5 to 6 h was observed for the isolates in presence of increased concentration of tannic acid. In addition, the morphology of gram positive diplococci converted to an elongated chain of 40–50 cells with increasing tannic acid from 1 to 4%. Qualitatively, the tannase activity was found to be present in the isolates tested, indicating their potential of being a tannin degrader. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)