LEAD ACCUMULATION IN YARD LONG BEANS (VIGNA UNGUICULATA SUBS. SESQUIPEDALIS) AND ITS EFFECT ON PLANTS’ HEIGHT
Heavy metal contamination has been a problem for decades because of agricultural and industrial activities. Among heavy metals, lead (Pb) is a potential pollutant that is accumulated in the soil. Many phytoremediation studies have been made so as to find the most efficient method in the extraction of this metal. For this purpose, this study investigated the accumulation capacity of yard long beans to 3000 ppm lead. After six weeks of germination, the plants were harvested, air-dried and prepared using the Acid Digestion Method. The samples were tested for lead absorption using the Atomic Absorption Spectrophotometer and were statistically analyzed using one-way ANOVA. Results showed that the application of 3000 ppm lead reduces the plants’ height by 5.26%. Maximum lead concentration uptake of yard long bean was found to be 41.67 mg/kg dry weight, without any chelator. In conclusion, the level of leadaccumulation in plant decreases as lead concentration (lead amendment) increases. This character inhibited by yard long beans suggested their potential as a phytoremediating agent to lead.