| microcystis toxigenic strains in urban lakes: a case of study in mexico city. | microcystis is a bloom-forming, common cyanobacterium in urban lakes of mexico city. to assess the presence of potentially cyanotoxin-producing microcystis, molecular techniques were applied and acute toxicity bioassays were performed with daphnia magna neonates exposed to cyanobacterial crude extracts. toxigenic potential of isolated strains was inferred by amplifying the mcya-cd genes and their identity as microcystis was confirmed through the 16s rdna and phycocyanin operon amplification. mic ... | 2010 | 20446109 |