Polluted soil with lead at 200 ppm decreased plant growth of mungbean
plants, expressed by length of shoot system. its dry weight. number of branches and
leat area (cmzl plant as well as photosynthetic pigment concentrations in the leaves in
both seasons. While, lead concentrations in both root and shoot systems were
increased Lead was more concentrated in the root than shoot system.
Thickness of leaflet blade at mldvein. mesophyll tissue thickness. size of the
midvein vascular bundle, xylem and phloem tissues thickness as well as metaxylem
vessel diameter were also decreased. Yeild and its components represented by pods
number! plant. seed weight! plant and 100 seed weight as well as the percentages of
total soluble carbohydrate. protein. N. P and K in the seeds were atso decreased.
0n the other hand. treatments with phosphorus. yeast and VA- mycorrhizae
and their interactions increased all the above mentioned parameters in both non-
polluted and polluted soils. Treatment with yeast alone as well as the interaction
between P and VA-mycorrhizae were the most effective in this respect. These
treatments are recommended not only for improving plant growth and yield of
mungbean plant but also for recovery the adverse effects of lead pollution.
Abbreviations: Chl. = Chlorophyll a; L = Lead; M = Mycorrhizae; Y = Yeast.