Rapid and complete degradation of the herbicide picloram by Lipomyces kononenkoae

Michael J. Sadowsky, William C. Koskinen, Marianne Bischoff, Brian L. Barber, Joanna M. Becker, Ronald F. Turco

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

An enrichment culture approach was used to isolate a pure culture of the yeast Lipomyces kononenkoae, which had the ability to grow on the herbicide picloram. The yeast rapidly and completely degraded 50 μg mL -1 picloram by 48 h of growth. While L kononenkoae was found to use both N atoms of picloram as a sole nitrogen source for growth, it failed to mineralize the herbicide or use it as a sole C source. Product analysis done using LC-ESI-MS indicated that biodegradation of picloram by L kononenkoae proceeds via a didechlorinated, dihydroxylated, pyridinecarboxylic acid derivative. Our results are consistent with the hypothesis that the majority of picloram degradation in the soil is likely due to microbial catabolic processes.

Original languageEnglish (US)
Pages (from-to)4878-4882
Number of pages5
JournalJournal of agricultural and food chemistry
Volume57
Issue number11
DOIs
StatePublished - Jun 10 2009

Keywords

  • Biodegradation
  • Complete degradation
  • Dechlorination
  • Lipomyces kononenkoae
  • Picloram
  • Yeast

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