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Volume 2 (2002), Pages 1501-1506
Short Communication

Biodegradation of Chlorsulfuron and Metsulfuron-Methyl by Aspergillus niger

1Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Sezione MAAE, Università di Milano, via Celoria 2, I-20133 Milano, Italy
2Dipartimento di Scienze Molecolari Agroalimentari (DISMA), Sezione di Chimica, Università di Milano, via Celoria 2, I-20133 Milano, Italy

Received 12 November 2001; Revised 19 March 2002; Accepted 25 March 2002

Copyright © 2002 Elisabetta Zanardini et al.


In this work, investigations were performed under laboratory conditions of the degradation ability by a common soil fungus, Aspergillus niger, toward chlorsulfuron and metsulfuron-methyl. The results were very encouraging (79% for chlorsulfuron and 61% for metsulfuron-methyl of total degradation), especially compared to those registered in our previous studies with a Pseudomonas fluorescens strain B2 (about 21 to 32%). Furthermore, the chemical degradation of the two compounds was studied and two products (1[2-methoxy-benzene-1-sulfonyl]-7-acetyltriuret and 1[2-chlorobenzene-1-sulfonyl]-7-acetyltriuret) were isolated and characterised by hydrolysis in acidic conditions. Our aim in the future will be the identification of intermediate metabolites by HPLC and LC-MS analyses in order to identify the degradative pathway by the fungal strain and to compare this to those obtained by chemical degradation and by P. fluorescens strain.