Cd uptake in rice cultivars treated with organic acids and EDTA
Weihong Xu , Yangrui Li , Jianping He , Qifu Ma , Xiaojing Zhang , Guiqing Chen , Huixian Wang , Haibo Zhang
DOI:
Received May 22, 2009,Revised September 09, 2009, Accepted , Available online
Volume 22,2010,Pages 441-447
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A pot experiment was conducted to examine the activity of antioxidant enzymes, the content of malondialdehyde (MDA), proline and
protein, and Cd uptake in di erent rice cultivars exposed to Cd (0, 1 and 5 mg/kg) in the presence of organic acids and ethylenediamine
tetraacetic acid (EDTA). The results showed the increase in activity of dismutase (SOD), contents of proline and protein but a decline in
activities of peroxidase (POD) and catalase (CAT), and MDA content for cultivars Xiushui63 and IIyou527. The resistance to Cd was
higher in Xiushui63 than that in IIyou527 under the same Cd treatment. Cadmium contents in grain, straw and roots of both cultivars
were markedly reduced in the presence of organic acids and EDTA. Grain Cd contents was the highest for plants treated with organic
acids, followed by organic acids + 1/2EDTA, and the lowest with EDTA; Cd contents in straw and root were the lowest for plants
treated with organic acids, followed by organic acids + 1/2EDTA, and the highest with EDTA treatment when exposed to Cd.
