When Arabidopsis thalian was exposed to a concentration of 67-535 µgL -1 this resulted in inhibition of seedling root elongation . Inhibition of root growth, disruption of Thylakoid membrane structure and decrease in chlorophyll content was observed when Arabidopsis was exposed to s series of concentrations of 0.2, 0.5 and 3 mgL -1 [55]. This data is been summarized in Table . [52]