Abstract
Strain YAYA6 was isolated from a mixed microbial community that was growing on atrazine as a sole carbon source and formed quantitative amounts of chloride and nitrate. This strain was identified as a member of the true pseudomonad group (RNA group I) and was given the designation DMS 93-99. The growth yield when atrazine was the sole carbon and nitrogen source was 80 g (dry weight) of cells per mol of atrazine, and the cell doubling time was around 11 h. Approximately 20% of [U-ring 14C]atrazine was mineralized during primary degradation of atrazine. After atrazine disappeared from the culture supernatant, mineralization continued until the level of mineralization was more than 50%. Under different experimental conditions 10% of the atrazine supplied initially was converted to cyanuric acid and < 1% was converted to other s-triazines after prolonged incubation. Degradation proceeded via dechlorination and N-dealkylation. Atrazine was degraded until the concentration was circa 0.1 milligrams/liter. We obtained evidence showing that strain YAYA6 has specific uptake mechanisms for atrazine but less specific degradation mechanisms for s-triazines.
Full text
PDF





Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Behki R., Topp E., Dick W., Germon P. Metabolism of the herbicide atrazine by Rhodococcus strains. Appl Environ Microbiol. 1993 Jun;59(6):1955–1959. doi: 10.1128/aem.59.6.1955-1959.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Geller A. Studies on the degradation of atrazine by bacterial communities enriched from various biotopes. Arch Environ Contam Toxicol. 1980;9(3):289–305. doi: 10.1007/BF01057409. [DOI] [PubMed] [Google Scholar]
- Jessee J. A., Benoit R. E., Hendricks A. C., Allen G. C., Neal J. L. Anaerobic degradation of cyanuric Acid, cysteine, and atrazine by a facultative anaerobic bacterium. Appl Environ Microbiol. 1983 Jan;45(1):97–102. doi: 10.1128/aem.45.1.97-102.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mandelbaum R. T., Wackett L. P., Allan D. L. Mineralization of the s-triazine ring of atrazine by stable bacterial mixed cultures. Appl Environ Microbiol. 1993 Jun;59(6):1695–1701. doi: 10.1128/aem.59.6.1695-1701.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]