Degradation of the Herbicide Glyphosate by Members of the Family <i>Rhizobiaceae</i>

DOI Web Site 被引用文献3件
  • C.-M. Liu
    BioTechnica International, Inc., 85 Bolton Street, Cambridge, Massachusetts 02140
  • P. A. McLean
    BioTechnica International, Inc., 85 Bolton Street, Cambridge, Massachusetts 02140
  • C. C. Sookdeo
    BioTechnica International, Inc., 85 Bolton Street, Cambridge, Massachusetts 02140
  • F. C. Cannon
    BioTechnica International, Inc., 85 Bolton Street, Cambridge, Massachusetts 02140

説明

<jats:p> Several strains of the family <jats:italic>Rhizobiaceae</jats:italic> were tested for their ability to degrade the phosphonate herbicide glyphosate (isopropylamine salt of <jats:italic>N</jats:italic> -phosphonomethylglycine). All organisms tested (seven <jats:italic>Rhizobium meliloti</jats:italic> strains, <jats:italic>Rhizobium leguminosarum, Rhizobium galega, Rhizobium trifolii, Agrobacterium rhizogenes</jats:italic> , and <jats:italic>Agrobacterium tumefaciens</jats:italic> ) were able to grow on glyphosate as the sole source of phosphorus in the presence of the aromatic amino acids, although growth on glyphosate was not as fast as on P <jats:sub>i</jats:sub> . These results suggest that glyphosate degradation ability is widespread in the family <jats:italic>Rhizobiaceae.</jats:italic> Uptake and metabolism of glyphosate were studied by using <jats:italic>R. meliloti</jats:italic> 1021. Sarcosine was found to be the immediate breakdown product, indicating that the initial cleavage of glyphosate was at the C—P bond. Therefore, glyphosate breakdown in <jats:italic>R. meliloti</jats:italic> 1021 is achieved by a C—P lyase activity. </jats:p>

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