Abstract
Vigna radiata and Vigna unguiculata plants were grown in lead (Pb) contaminated soil which is amended with different
concentrations of organic fertilizer (chicken manure) and mineral fertilizer (NPK). In present investigation polluted soil was from
industrial area of Karachi with elevated Pb content. The concentration of photosynthetic pigments that is chlorophyll “a”, “b” and
carotenoides in leaf of developing plants were monitored every one week interval up to the period of 4 weeks. Application of both
fertilizer improve the concentration of chlorophyll “a”, “b” and carotenoids, with time. In control of both Vigna radiata and Vigna
unguiculata, chlorophyll “a”, “b” and carotenoids concentration was reduces, such redution in the concentration of leaf pigment due to
the toxic effect of metals (Pb).
