Document Type : Full Paper
Authors
1
Ph. D. Candidate, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
2
Assistant Professor, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
3
Associate Professor, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
4
Assistant Professor, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
Abstract
In order to evaluate the effect of sodium nitroprusside (SNP) as nitric oxide donor (NO) on some morphophysiological and biochemical characteristics of cock's comb plant under cadmium stress, this experiment was designed as a complete randomized factorial design with three replications (pot with sand loamy soil) in greenhouse condition (temperature 25-30 °C, relative humidity 60%, and a 14/10 light–dark cycle) in spring and summer 2017. The first factor included two levels of Cd (30 and 60 mg.kg-1) with noncontaminated soil, and the second factor included three levels of SNPfoliar application (0,100 and 200μM). The results showed that with increasing Cd concentration, the activity of antioxidant enzymes, amount of hydrogen peroxide (H2O2), malondialdehyde (MDA), Cd in roots and shoots increased, while the content of total chlorophyll, shoot and root dry weight decreased. On the other hand, the pplication of 100 μM SNP at the highest level of cadmium, compared to non-application, dramatically increased root dry weight (2.4 fold), cadmium concentration in the roots (51%), total chlorophyll (50%), proline (74%), and also, decreased H2O2 (28%) and MDA (41%). It seems that the application of this material caused further uptake of cadmium in the roots and prevent its translocation towards the shoots, can improve the adverse effects of cadmium by a reduction in oxidative damage.
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