| microcystins in groundwater wells and their accumulation in vegetable plants irrigated with contaminated waters in saudi arabia. | the present study describes the presence of toxic cyanobacteria and microcystin (mcyst) concentrations in groundwater wells and tissues of vegetable plants irrigated with well waters in asir region, southwest of saudi arabia. the results revealed the presence of cyanobacteria in all groundwater wells with a dominance of oscillatoria limentica. this species was found to produce mcysts at a concentration of 336 microg g(-1) as determined by enzyme-linked immunosorbent assay (elisa). hplc chromatog ... | 2009 | 19640645 |