Agricultural and Biological Chemistry
Online ISSN : 1881-1280
Print ISSN : 0002-1369
Degradation of Phenanthrene through o-Phthalate by an Aeromonas sp.
Hohzoh KIYOHARAKazutaka NAGAORyosaku NOMI
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1976 Volume 40 Issue 6 Pages 1075-1082


A phenanthrene-assimilating bacterium which belongs to the genus Aeromonas was isolated from soil. The cells which adapted to phenanthrene required a growth lag time on a naphthalene medium. The cells oxidized 1-hydroxy-2-naphthoate (1H2NA), 2-carboxybenzaldehyde (2CBAL), o-pbthalate (OPA) and protocatechuate (PCA) but did not oxidize salicylalde-hyde (SAL), salicylate (SA) and catechol (CAT) which are intermediates in naphthalene catabolism. Using the cell-free extract, the same results were obtained in oxidative capacity. The intact cells metabolized 1H2NA and 2CBAL without the lag time, giving 2CBAL and PCA, respectively. The ammonium sulfate-treated extract prepared from the cells grown in phenanthrene medium, converted 1H2NA to 2CBAL and 2CBAL to OPA. It was suggested that the Aeromonas sp. degraded phenanthrene through OPA.

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