肉色曲霉、尖孢镰刀菌和绿色木霉对氟乐灵的微生物降解作用。

Microbial degradation of trifluralin by Aspergillus carneus, Fusarium oxysporum and Trichoderma viride.

作者信息

Zayed S M, Mostafa I Y, Farghaly M M, Attaby H S, Adam Y M, Mahdy F M

出版信息

J Environ Sci Health B. 1983;18(2):253-67. doi: 10.1080/03601238309372367.

Abstract

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.

摘要

3H-氟乐灵由3H-4-氯-3,5-二硝基-α,α,α-三氟甲苯与二正丙胺缩合而成。将氟乐灵与肉色曲霉、尖孢镰刀菌和绿色木霉一起培养10天后，在可提取部分中回收了一小部分（不到10%）未变化的除草剂。这表明该除草剂被这些真菌物种相当快速地降解。除了氟乐灵，培养基中至少含有五种标记产物：2,6-二硝基-N-正丙基-α,α,α-三氟对甲苯胺；2,6-二硝基-α,α,α-三氟对甲苯胺；2-氨基-6-硝基-α,α,α-三氟对甲苯胺、2,6-二硝基-4-三氟甲基苯酚以及一种主要的极性产物，该极性产物占可提取转化产物总量的50%以上。针对氟乐灵的微生物降解，提出了一条模拟该除草剂在土壤中需氧降解途径的降解途径。