%0 Journal Article
%T Humic Acid Decreased Hazardous of Cadmium Toxicity on Lettuce (Lactuca sativa L.)
%A Maryam Haghighi
%A M. Kafi
%A P. Fang
%A L. Gui-Xiao
%J Vegetable Crops Research Bulletin
%@ 1898-7761
%D 2010
%I 
%R 10.2478/v10032-010-0005-z
%X The binding of Cd to humic acid was studied. The influence of a Cd-humic complex on enzyme activities (superoxide dismutases, peroxidases), availability of Cd, and biomass compared with the behavior of no treatment (control). It was examined through a hydroponics system in lettuce. Treatments were: control (no additions), humic acid (0, 100 and 1000 mg¡¤L-1), and Cd (0, 2 and 4 mg¡¤L-1). Enzyme activities increased significantly with increasing rates of cadmium. A significant increase (P<0.05) in cadmium content of leaves result in a considerable decrease in the biomass (P<0.05). It can be concluded that the humic acid applied in the media led to a decrease the metal adsorption by plant. This material can be used to reduce the availability and mobility of heavy metals in the soils, too.
%K Superoxide dismutase (SOD)
%K Peroxidase (POD)
%K Heavy metal
%K Cadmium
%U http://versita.metapress.com/content/a232x213880815u8/?p=4a23bd1f20e94b28b94bd5c4ed2ca300&pi=4