Production of amino acids by Azotobacter vinelandii and Azotobacter chroococcum with phenolic compounds as sole carbon source under diazotrophic and adiazotrophic conditions |
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Authors: | J J Revillas B Rodelas C Pozo M V Martínez-Toledo J González López |
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Institution: | (1) Group of Environmental Microbiology, Department of Microbiology, Faculty of Pharmacy and Institute of Water Research, University of Granada, Granada, Spain |
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Abstract: | Summary. Azotobacter vinelandii strain ATCC 12837 and Azotobacter chroococcum strain H23 (CECT4435) were tested to grow in N-free or NH4Cl amended chemically defined media, with protocatechuic acid or sodium p-hydroxybenzoate as sole carbon (C) sources at a concentration of 2 mmol/L. Both substrates supported grow at similar rates than bacteria grown in control media amended with 2 mmol/L sodium succinate as C source. The two strains produced aspartic acid, serine, glutamic acid, glycine, hystidine, threonine, arginine, alanine, proline, cysteine, tyrosine, valine, methionine, lysine, isoleucine, leucine and phenylalanine after 72 h of growth in chemically defined media with 2 mmol/L of phenolic compounds or sodium succinate as sole C source amended or unamended with 0.1% (w/v) NH4Cl. Qualitative and quantitative production of all amino acids was not affected by the use of different C and N substrates. |
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Keywords: | : Amino acids – Azotobacter – Phenolic compounds – Soil microbiota |
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