Resumo

PAIVA, Haroldo Nogueira de; CARVALHO, Janice Guedes de  e  SIQUEIRA, José Oswaldo. Translocation index of nutrients in cedro (Cedrela fissilis Vell.) and ipê-roxo (Tabebuia impetiginosa (Mart.) Standl.) seedlings submitted to increasing levels of cadmium, nickel and lead. Rev. Árvore [online]. 2002, vol.26, n.4, pp. 467-473. ISSN 0100-6762.  http://dx.doi.org/10.1590/S0100-67622002000400009.

In order to evaluate the effects of Cd, Ni, and Pb toxicity, cedro (Cedrela fissilis Vell.) and ipê-roxo (Tabebuia impetiginosa (Mart.) Standl.) seedlings were cultivated in a Clark nutrient solution under greenhouse conditions at the Soil Science Department of the Federal University of Lavras, and submitted to increasing levels of Cd (0, 22, 44, 88 and 132 mmol/l), Ni (0, 42, 84, 169 and 252 mmol/l) and Pb (0, 48, 96, 192 and 288 mmol/l), using a statistical design of randomized blocks. At the end of 60 days of exposure to the heavy metals, macro and micronutrient translocation index evaluations were conducted. The results show that, in general, P, K, Ca, Mg, S, Cu, Fe, Mn, and Zn translocation indices are influenced by the increasing levels of Cd, Ni, and Pb applied. This influence varies according to the species, heavy metal, and nutrient used.

Palavras-chave : Native forest species; heavy metal; plant nutrition.