The goal of the present study was to investigate interrelations between the action of FC and lead on the elongation growth and proton extrusion in maize coleoptile segments. It was found that the FC-induced growth of maize coleoptile segments was enhanced ca. 2.8-fold as compared to the endogenous growth (growth without FC). Pb caused different effect depending on the time of lead addition. Lead applied to the incubation medium at 0 time reduced the FC-induced growth by 30%, whereas Pb added to the incubation medium at 60, 120, 240 min not significantly affected the FC- induced growth. Acidification of the incubation medium observed in the presence of FC was not changed by lead.
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