Biotransformation of s -Triazine Herbicides and Related Degradation Products in Liquid Cultures by the White Rot Fungus Phanerochaete chrysosporium
✍ Scribed by Mougin, Christian; Laugero, Chantal; Asther, Marcel; Chaplain, Véronique
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 296 KB
- Volume
- 49
- Category
- Article
- ISSN
- 1526-498X
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✦ Synopsis
The ability of the white rot basidiomycete Phanerochaete chrysosporium to transform s-triazine herbicides has been investigated in laboratory experiments. The chlorinated metabolites formed during atrazine Ndealkylations were not further transformed by the fungus, whereas hydroxyatrazine was converted to an unknown product. P. chrysosporium was also able to carry out the N-dealkylation of the herbicides simazine, propazine and terbuthylazine. Herbicide metabolism was not supported by puriÐed peroxidases. The highest rates of herbicide N-dealkylation were obtained in liquid cultures maintained under moderate temperature allowing a long mycelium growing phase. Atrazine transformation was found to be supported by the mycelium, which contained signiÐcant amounts of microsomal cytochrome P450. Herbicide N-dealkylation was decreased in the presence of 1-aminobenzotriazole, in agreement with the involvement of P450 monooxygenases in atrazine metabolism.