Summary
Catechin, a condensed tannin was utilized as sole carbon source by Bradyrhizobium japonicum. Protocatechuic acid, phloroglucinolcarboxylic acid, phloroglucinol, resorcinol and hydroxyquinol were identified as intermediates of catechin degradation. The aromatic substrates favoured good growth up to 5 or 10 mm. B. japonicum tolerated up to 50 mm catechin and phloroglucinolcarboxylic acid, 40 mm phloroglucinol and resorcinol, 30mm protocatechuic acid and 10 mm hydroxyquinol. Catechin-induced cells oxidized catechin more rapidly than uninduced cells. The two final ring compounds of the catechin catabolic pathway, protocatechuic acid and hydroxyquinol, were oxidized differentially. The enzymes of the catechin degradative pathway were inducible in B. japonicum.
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Hopper, W., Mahadevan, A. Utilization of catechin and its metabolites by Bradyrhizobium japonicum . Appl Microbiol Biotechnol 35, 411–415 (1991). https://doi.org/10.1007/BF00172735
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DOI: https://doi.org/10.1007/BF00172735