PERFORMANCE OF Vigna ambacensis L. AS PHYTO-STABILIZATER, GROWN UNDER CONTAMINATED SOILS
The study was conducted to evaluate the performance of Vigna ambacensis L as phytostabilizer using contaminated soil sediments. Soil sediment was collected from five different sites (T1-T5) located in Wadi Hanifa Riyadh Saudi Arabia. The experiments were conducted in pots under greenhouse condition. The plants were sampled after 40 days from transplantation, Shoot, root fresh and dry weight and stem and root length, leaf number their area, total Chlorophyll (CM.) and CM. a, b content, carotenoids (Car.) contents, heavy metal content of plant parts, and its translocation factors (TF) were determined. Results showed an increase in most of the parameters used with the waste sediments from T2-T5 treatments, compared to the control; T1 had 50% growth reduction, compared to the control. There is a decrease in root dry weight (RDW) of T1-T3, especially in T2, reaching 55%. CM. b and c were higher than CM. a in the leaves. Heavy metal content varied with the element. V. ambacensis showed the ability to tolerate and accumulate heavy metals. In all treatments, plants had bioconcentration factor (BCF) values more than 1 and TF values less than 1, this indicates that V. ambacensis is suitable for Ni and Zn phytostabilization.
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