Abstract：
:Multiple bacterial strains with CBA metabolic properties were isolated using a simple selective strategy. Phylogenetic analysis of the 16S rRNA gene sequences grouped them into two main clusters consisting of four bacterial phyla and belonging to 17 genera. Whereas growth was more frequent with 2-CBA (∼68%), 50% grew on 4-CBA and ∼7% utilized 3-CBA. One third of the strains exhibited 2,4-dichlorobenzoic acid (2,4-diCBA) catabolic function and were mainly representatives of α-, β- and γ-Proteobacteria. In batch experiments, growth was concomitant with substrate disappearance and near-stoichiometric release of chloride. Doubling times for 2,4-diCBA degradation doubled those determined for mono-substituted CBAs. Out of the six 2,4-diCBA degraders submitted for enzyme assays, significant induction of catechol 1,2-dioxygenase types I and II activities in cell-free extracts were found in four while protocatechuate 3,4-dioxygenase activity was detected in the remaining two. Activities in CBA-grown cells were 20 orders-of-magnitude higher than those grown on benzoic acid.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Adebusoye SA,Miletto Mdoi
10.1016/j.biortech.2010.10.026subject
Has Abstractpub_date
2011-02-01 00:00:00pages
3041-8issue
3eissn
0960-8524issn
1873-2976pii
S0960-8524(10)01682-2journal_volume
102pub_type
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