ISOLATION AND IDENTIFICATION OF -CYCLOCITRAL DEGRADING BACTERIA

-cyclocitral, one of the most common taste and odour compounds, is mostly produced by water bloom forming Microcystis. Using the agar-plate method, bacterial strains DH16 and DH18 for degrading -cyclocitral were isolated from the water samples in the Microcystis dominated water blooms. Phylogenetic analysis based on the 16S rRNA gene sequences revealed that these strains belonged to genera Acidovorax and Acinetobacter respectively. The strain Novosphingobiums sp.THN1, a reported microcystin degraded strain, was also shown to have the ability to degrade -cyclocitral. The experiment using -cyclocitral as the sole carbon source demonstrated that strains DH18 and THN1were able to decompose -cyclocitral efficiently, and these bacterial strains could provide good model organisms for the studying the biodegradation of -cyclocitral.