Effect of cadmium and lead ions on the growth characteristics, chlorophyll content and some photosynthetic enzymes activity in maize (Zea mays L.)

cadmio cadmium chemical composition chlorophylle chlorophylls clorofilas composition chimique crecimiento croissance fitotoxicidad functional disorders growth lead photosynthese photosynthesis phytotoxicity plomb plomo trastornos funcionales trouble fonctionnel zea mays