Influence of cadmium and zinc on growth and photosynthesis of Bacopa monniera cultivated in vitro

This study evaluates the impact of cadmium and zinc interaction on the amou nt of soluble proteins, CO2 fixation, stomatal conductance and intercellula r CO2 contents in regenerants of B. monniera. The regenerants were grown fo r 16 weeks on MS medium containing cadmium and zinc in various concentratio ns. Cadmium decreased the stomatal conductance, photosynthetic rate and roo t growth but increased the protein content. Additional supply of zinc in th e medium reduced the adverse effects of cadmium on these parameters.