The degradative properties towards chlorobenzoates by a 2-chlorobenzoate-degrading mixed culture (2MC) were investigated. Although 2MC did not grow on 2,3,5-; 2,3,6- and 2,4,6-trichlorobenzoates, it was able to completely oxidise 2,3,5-trichlorobenzoate and 2,5-dichlorobenzoate. This was degraded through the intermediate formation of 4-chlorocatechol and 3-cis,cis-chloromuconate, suggesting a dioxygenation in 1,2 position. 4-Chlorobenzoate; 3,4- and 2,6-dichlorobenzoate; 2,4,6- and 2,3,6-trichlorobenzoate did not undergo any co-metabolic transformation, the only 2,4-dichlorobenzoate was scarcely transformed into a dichlorinated phenol as end-product. 2MC was constituted of three prominent species: Stenotrophomonas maltophilia, Cupriavidus necator and Flavobacterium sp. Ring-hydroxylating dioxygenase genes (BenA) were retrieved in S. maltophilia and C. necator, indicating the presence of a “modified ortho pathway” in the culture. On the basis of its degradative properties, 2MC could be a good candidate for use in the removal of ortho- and/or meta-chlorobenzoates that are the major end-products of PCB co-metabolism.
Co-metabolism of di- and trichlorobenzoates in a 2-chlorobenzoate-degrading bacterial culture : Effect of the position and number of halo-substituents / G. Baggi, S. Bernasconi, M.E. Zangrossi, L. Cavalca, V. Andreoni. - In: INTERNATIONAL BIODETERIORATION & BIODEGRADATION. - ISSN 0964-8305. - 62:1(2008), pp. 57-64.
|Titolo:||Co-metabolism of di- and trichlorobenzoates in a 2-chlorobenzoate-degrading bacterial culture : Effect of the position and number of halo-substituents|
BAGGI, GRAZIA (Primo)
BERNASCONI, SILVANA (Secondo)
CAVALCA, LUCIA (Penultimo)
ANDREONI, VINCENZINA (Ultimo)
|Parole Chiave:||(Chloro)benzoate dioxygenase; Biodegradation; Co-metabolism; Halo-substituent; meta-; Ortho-; para-position|
|Settore Scientifico Disciplinare:||Settore AGR/16 - Microbiologia Agraria|
Settore CHIM/06 - Chimica Organica
|Data di pubblicazione:||2008|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.ibiod.2007.12.002|
|Appare nelle tipologie:||01 - Articolo su periodico|
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