The Influence of Cadmium Toxicity on Some Physiological Parameters as Affected by Iron in Rice (Oryza Sativa L.) Plant
2014
Khavari-Nejad, Ramazan Ali | Najafi, Farzaneh | Rezaei, Maedeh
The effects of interaction between cadmium chloride (CdCl ₂) and iron (Fe)- ethylenediaminetetraacetic acid (EDTA) were studied in rice plant. The seedlings of rice were treated with 0, 50, and 100 μM CdCl ₂ supplemented with 5, 10 and 20 ppm Fe as Fe-EDTA for 30 days. Plants were grown under controlled condition. In all the plants treated with CdCl ₂, growth parameters [relative leaf growth rate (RLGR), specific leaf area (SLA), and leaf water content area (LWCA)], soluble, and unsoluble sugars contents decreased. Addition of Fe-EDTA moderated cadmium effects. Under CdCl ₂ stress without Fe, malondialdehyde (MDA) content, proline content, catalase (CAT) and peroxidase (POD) activity increased, however, in solutions containing both CdCl ₂ and Fe-EDTA, MDA content, proline content and activities of antioxidant enzymes decreased. In 50 μM CdCl ₂, total protein content increased but in 100 μM decreased. With increasing Fe in solutions containing CdCl ₂, protein content decreased. The results indicated that with increasing Fe-EDTA in CdCl ₂ treated plants, the effects of toxicity of Cd decreased.
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