title: The Removal of Cyanobacterial Hepatotoxin [Dha(7)] Microcystin-LR via Bioaccumulation in Water Lettuce (Pistia stratiotes L.).
abstract: The removal of [Dha(7)] microcystin-LR through bioaccumulation in six aquatic plants was investigated. The aquatic plant water lettuce (Pistia stratiotes L.) exhibited the highest removal, with 13 % of the toxin remaining after a 7-day exposure period. Removal by P. stratiotes (with 0.5 and 1.0 mg/L of the toxin) was faster and greater in static systems than in continuous flow systems. In the static experiment, P. stratiotes roots accumulated [Dha(7)] microcystin-LR up to a concentration of 0.0088 ng/mg wet wt. plant material, whereas in the continuous flow system, the plant root tissue accumulated the toxin up to a concentration of 0.0041 ng/mg wet wt. plant material. Exposure to the toxin at concentrations of 0.5 and 1.0 mg/L induced changes in the development of P. stratiotes, including short, thin and rotted roots with decreased leaf counts after 3 days of exposure.
authors.affiliation: Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand. thesom@kku.ac.th.
authors.forename: Theerasak
authors.initials: T
authors.lastname: Somdee
authors.affiliation: Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
authors.forename: Benjamad
authors.initials: B
authors.lastname: Thathong
authors.affiliation: Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
authors.forename: Anchana
authors.initials: A
authors.lastname: Somdee
mesh_terms: D029064:Araceae / Q000254:growth & development* / Q000378:metabolism; D001673:Biodegradation, Environmental; D008387:Marine Toxins; D052998:Microcystins / Q000032:analysis* / Q000378:metabolism; D046931:Microcystis / Q000378:metabolism*; D013785:Thailand; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism
chemical_list: C000611762:((Dha)7)-microcystin-LR; D008387:Marine Toxins; D052998:Microcystins; D014874:Water Pollutants, Chemical; C057862:cyanoginosin LR
keywords: Bioaccumulation; Pistia stratiotes; Removal; Water lettuce; [Dha7] microcystin-LR