PHYTOTOXIC EFFECTS OF RISING DOSES OF CHOSEN ELEMENTS IN INITIAL PHASES OF WHEAT GROWTH

Summary In laboratory conditions were investigated effectivness upward doses of arsenic, cadmium, lead, stroncium, molybdenum and manganese on quality and quantity of cultivated biomass wheat (Triticum aestivum L.) during 21 days and production of chlorophyll a and chlorophyll b. The most expressive decrease of growth crops we finded out at As > Cd > Pb. The increase of their concentration (with Cd from 5 to 15 and with As and Pb from 30 to 90 mg.kg -1 ) in soils caused increase of their concentration in biomasse. The most expressive decrease of production chlorophyll a and chlorophyll b we finded out at cadmium. Increasing rates of Mo, Mn, Sr negatively affected synthesis of chlorophyll a and b, changing strongly the ratio of chlorophyll a: chlorophyll b at the same time.