INFLUENCE OF TOXIC METAL-IONS ON PHENOLS IN NEEDLES AND ROOTS, AND ONROOT RESPIRATION OF SCOTS PINE-SEEDLINGS

Nitrates of aluminum, cadmium, manganese and lead cause changes in the content of phenolic compounds (o-dPh and TPh) in needles and roots, a nd in the rate of dark respiration (DR) of roots of one-year-old seedl ings Of Scots Pine (Pinus sylvestris L.). The changes depend on the ca tion, the salt concentration used, and the analyzed plant part. The ob served changes in the levels of phenolic compounds in needles and root s, and the rate of respiration in roots, indicate the following rank i n toxicity of the studied metal cations: Mn < Al < Pb < Cd.