期刊名称：EQA - International Journal of Environmental Quality
印刷版ISSN：2281-4485
出版年度：2019
卷号：34
页码：17-33
DOI：10.6092/issn.2281-4485/8528
出版社：Alma Mater Studiorum - University of Bologna
摘要：The objective of present paper was to evaluate nickel phytoextraction capacity of
Indian mustard plants (Brassica juncea arawali) with and without chelant
application. The chelants chosen for the study were ethylene diamine tetraacetic
acid (EDTA) and salicylic acid (SA). Seeds of Indian mustard were sown in nickel
contaminated soils with nickel concentrations from 100 to 800 mg/l as nickel
nitrate. Plants were harvested at four stages. Various morphological parameters,
biochemical parameters and nickel phytoextraction potential of plants were studied.
It was found that seed germination and percentage survival of Indian mustard
reduced with increasing concentration of Ni. Addition of SA enhanced germination
and survival of B. juncea, while EDTA played negative role. Plant growth
parameters like numbers of branches and leaves, root length and shoot length
decreased with increased concentrations of Ni. In general, EDTA decreased all
morphological parameters, whereas SA stimulated them. EDTA treated plants
showed 83-90% higher Ni accumulation compared to control for the applied Ni
doses of 100-800 mg/l respectively. The Ni metal accumulation order was
Ni+EDTA>Ni+SA>Ni. EDTA proved to be more efficient chelant than SA for Ni
removal from contaminated soil.
其他摘要：The objective of present paper was to evaluate nickel phytoextraction capacity of Indian mustard plants ( Brassica juncea arawali ) with and without chelant application. The chelants chosen for the study were ethylene diamine tetraacetic acid (EDTA) and salicylic acid (SA). Seeds of Indian mustard were sown in nickel contaminated soils with nickel concentrations from 100 to 800 mg/l as nickel nitrate. Plants were harvested at four stages. Various morphological parameters, biochemical parameters and nickel phytoextraction potential of plants were studied. It was found that seed germination and percentage survival of Indian mustard reduced with increasing concentration of Ni. Addition of SA enhanced germination and survival of B. juncea , while EDTA played negative role. Plant growth parameters like numbers of branches and leaves, root length and shoot length decreased with increased concentrations of Ni. In general, EDTA decreased all morphological parameters, whereas SA stimulated them. EDTA treated plants showed 83-90% higher Ni accumulation compared to control for the applied Ni doses of 100-800 mg/l respectively. The Ni metal accumulation order was Ni+EDTA>Ni+SA>Ni. EDTA proved to be more efficient chelant than SA for Ni removal from contaminated soil.
