Studies on Transfer and Bioaccumulation of Heavy Metals From Soil Into Lettuce

This paper presents the connection between the heavy metals concentration in soil and their bioaccumulation in lettuce.Lettuce is a very good bioaccumulator of heavy metals and nutrients.In general, plants manifest a certain reaction to increasing the toxic metal concentrations in soil which they are cultivated on.The differences depend on plants sensitivity, and time exposure intensity (concentration of heavy metals, cultivation length, etc.), presence or absence of nutrients and other chemical species in soil.Lead, cadmium, zinc and cooper, in some concentrations are toxic for plants, reducing their development.Through the tests presented in this paper the transfer of heavy metals in plants cultivated on a polluted soil in the presence or absence of N, P, K nutrients, was especially followed.