<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">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&lt;0.05) in cadmium content of leaves result in a considerable decrease in the biomass (P&lt;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.</abstract>

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.

Humic Acid Decreased Hazardous of Cadmium Toxicity on Lettuce (<italic>Lactuca sativa</italic> L.)

Department of Horticultural Science, College of Agriculture, University of Shiraz, Iran

Department of Horticultural Science, University of Teheran, Karaj, Iran

College of Natural Resources and Environmental Science, Department of Plant Nutrition, Zhejiang University, 310029, Hangzhou, China

Journal of Fruit and Ornamental Plant Research

Humic Acid Decreased Hazardous of Cadmium Toxicity on Lettuce ( L.)

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,...

Humic Acid Decreased Hazardous of Cadmium Toxicity on Lettuce (Lactuca sativa L.)

Published Online: Jul 16, 2010

Page range: 49 - 61

DOI: https://doi.org/10.2478/v10032-010-0005-z

Keywords
Superoxide dismutase (SOD), Peroxidase (POD), Heavy metal, Cadmium

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