Cyanobacterial blooms occur worldwide due to eutrophication and climate changes,and microcystins(MCs) have been gainning increasing attention in recent years.A microcystin-degrading bacterium strain,named SW1,was isolated from sedimentation ponds for treating cyanobacterial blooms located at north rim of Lake Taihu.Based on 16S rDNA gene sequence phylogenetic analysis,SW1 was identified as Sphingopyxis sp.The optimal culture pH for SW1 was at 7,and it can also survived at pH 10.SW1 degraded MC-LR and MC-RR ...