Toxicity and bioaccumulation of cadmium and lead in Salvinia cucullata.
The toxicity and accumulation of heavy metals, cadmium (Cd) and lead (Pb) in aquatic fern, Salvinia cucullata were studied. Plants were cultured in Hoagland's medium which was supplemented with 0.5,1,2, and 4 mg/l of Cd and 5, 10, and 40 mg/l of Pb and were separately harvested after 2,4,6, and 8 days. The toxicity symptoms of Cd and Pb to S. cucullata showed chlorosis on leaves. There were significant derceases in the relative growth, biomass productivity and total chlorophyll content when the exposure time and concentration were increased. The accumulation study showed the significant increases of both metals when the exposure time and concentration were increased. The roots of S. cucullata had higher Cd and Pb contents than leaves suggesting that the metals were bound to the root cells and were partially transported to the leaves.
Phetsombat
Siriwan
S
Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
Kruatrachue
Maleeya
M
Pokethitiyook
Prayad
P
Upatham
Suchart
S
D001692:Biological Transport; D018533:Biomass; D002104:Cadmium / Q000378:metabolism / Q000633:toxicity*; D002734:Chlorophyll / Q000378:metabolism; D029624:Ferns / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D007854:Lead / Q000378:metabolism / Q000633:toxicity*; D018515:Plant Leaves / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism / Q000633:toxicity*; D018508:Water Purification
D014874:Water Pollutants, Chemical; D002104:Cadmium; D002734:Chlorophyll; D007854:Lead