Microbial degradation of trifluralin by Aspergillus carneus, Fusarium oxysporum and Trichoderma viride.
3H-Trifluralin was synthesized by condensation of 3H-4-chloro-3,5-dinitro-alpha, alpha, alpha-trifluorotoluene with di-n-propylamine. After incubation of trifluralin with Aspergillus carneus, Fusarium oxysporum and Trichoderma viride for 10 days, a small percentage (less than 10%) of unchanged herbicide was recovered in the extractable fraction. This indicates a fairly rapid degradation of the herbicide by the fungal species. Other than trifluralin, the culture medium contained at least five labelled products: 2,6-dinitro-N-n-propyl-alpha, alpha, alpha-trifluoro-p-toluidine; 2,6-dinitro-alpha, alpha, alpha-trifluoro-p-toluidine; 2-amino-6-nitro-alpha, alpha, alpha-trifluoro-p-toluidine, 2,6-dinitro-4-trifluoromethyl phenol and a major polar product which constituted more than 50% of the total extractable transformation products. A pathway, which simulates that of aerobic degradation of the herbicide in soil, is suggested for the microbiological degradation of trifluralin.
D001230:Aspergillus / Q000378:metabolism; D001673:Biodegradation, Environmental; D005670:Fusarium / Q000378:metabolism; D007553:Isotope Labeling; D003904:Mitosporic Fungi / Q000378:metabolism*; D014052:Toluidines / Q000378:metabolism*; D014242:Trichoderma / Q000378:metabolism; D014274:Trifluralin / Q000138:chemical synthesis / Q000378:metabolism*
D014052:Toluidines; D014274:Trifluralin