Abstract
Pseudomonas fluorescens 410PR grows on 4-nitrobenzoate but does not
metabolize 4-nitrotoluene. The TOL pWW0 delta pm plasmid converts
4-nitrotoluene into 4-nitrobenzoate through its upper pathway, but
it does not metabolize 4-nitrobenzoate. P. fluorescens 410PR(pWW0
delta pm) transconjugants were isolated and found to be able to
grow on 4-nitrotoluene. This phenotype was stable after growth for
at least 300 generations without any selective pressure. P. fluorescens
410PR(pWW0 delta pm) converted 4-nitrotoluene into 4-nitrobenzoate
via 4-nitrobenzylalcohol and 4-nitrobenzaldehyde. 4-Nitrobenzoate
was metabolized via 4-hydroxylaminobenzoate and finally yielded
NH4+ and 3,4-dihydroxybenzoate, which was mineralized.
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