Degradation of certain aromatic compounds by Rhizobia
Abstract: The ability of 22 strains of Rhizobium to degrade catechol , protocatechuic acid . p -hydroxybenzoic acid and salicylic acid all at 1 mM concentration was examined . In the presence of 4.8 mM Na-glutamate, all rhizobia tested degraded catechol (99-100%), p-hydroxybenzoic acid (79-99%) , protocatechuic acid (81-97%) and salicylic acid (20-83%) . The concentration of Na glutamate in the medium affected the degradation of the phenolic compounds at 1mM concentration . Increased glutamate favoured degradation of p-hydroxybenzoic and salicylic acids but had little effect on catechol . Degradation of protocatechuic acid was inhibited by increased glutamate concentration . Rhizobium phaseoli 405 grown with 8.0 mM Na - glutamate, directly cleaved catechol and protocatechuic acid. P -hydroxybenzoic acid was converted to protocatechuic acid before ring cleavage. Salicylic acid was converted to gentisic acid before further oxidation . O2 uptake experiments showed that R. phaseoli 405 grown with . P -hydroxybenzoic acid was adapted to this compound and protocatechuic acid . A lag of 30 min was required for catechol and salicylic acid .
Publication year 1974
Pages 377-381
Organization Name
serial title Soil Biol. Biochem.
Author(s) from ARC
Agris Categories Weeds and weed control
AGROVOC
TERMS		 Fungi. Rhizobiaceae. Rhizobium.
Proposed Agrovoc Degrade catechol;protocatechuic acid;
Publication Type Journal
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