پديدآورندگان :
Sadeghi Mohammad Sadegh Department of Horticultural Sciences, Tarbiat Modares University, Tehran, Iran , Ahmadi Nima ahmadin@modares.ac.ir Department of Horticultural Sciences, Tarbiat Modares University, Tehran, Iran;
كليدواژه :
Heavy metals , Leaf area , Plant growth , Remediation , Seed germination
چكيده فارسي :
Phytoremediation is considered as one of the importantapproaches to eliminate pollution is consideredin industrial areas.Heavy metals are the most important types of pollution in industrial areas which should be removed from the soil.Remediation methods using chemical and physical approachesare very costly in purificationof soil from contaminants, while phytoremediation could be considered as a hopeful one.Commercial use of phytoremediation in industrial regions has not been considered in large scale, but mostlyit is evaluated in research projects. Researchers are going to investigate the use ofthe hyper-accumulatorornamental plants in industrial areas, in addition to benefiting from their landscape and aesthetics aspects. For this purpose, in this research, thepotential ofmarigold plant in the lead-contaminated soilwas evaluated by considering growth indices, in a completely randomized design. The treatment wasapplied usinglead nitrateat six different levels ofachieve0, 375, 750, 1350, 1850, 2450 mg/kglead,with 5 replications. The results of this study showed that with increasing lead concentration in soil, percentage of seeds germination was decreased, while seeds germination time was increased, comparing with control treatment. Decreasing leaf area index (LAI)and relativelygrowth rate (RGR), and increasingleaf weight ratio (LWR) was caused by increasing the heavy metal concentration,compared to control. The results showed that although the growth of marigold was inhibited in lead contaminated soil, but it could be considered as a candidate plant for remediation of lead-contaminated soils.
