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Acta Botanica Brasilica

Print version ISSN 0102-3306

Acta Bot. Bras. vol.3 no.2 Feira de Santana Dec. 1989

http://dx.doi.org/10.1590/S0102-33061989000200003 

Tolerância ao cobre em ecótipos de Schinus lentiscifolius March (Anacardiaceae) de áreas de mineração no Rio Grande do Sul,* Brasil

 

Copper tolerance in ecotypes of Schinus lentiscifolius March (Anacardiaceae) in mining regions of Rio Grande do Sul

 

 

Maria Luiza Porto

Universidade Federal do Rio Grande do Sul. Departamento de Botânica e Centro de Ecologia do Instituto de Biociências. Avenida Paulo Gama s/n, 90049, Porto Alegre, RS. Brasil Pesquisadora 2A do CNPq. Processo nº 305062/76

 

 


RESUMO

Sementes de Schinus lentiscifolius March, provenientes de duas áreas de mineração do Rio Grande do Sul, foram submetidas a testes de exposição ao CuSO4, visando comprovar a tolerância ao cobre na germinação e no desenvolvimento de plántulas. Os testes demonstraram que os dois clones reagem diferentemente ao cobre, porém ambos apresentaram mecanismos de tolerância. Plántulas provenientes de sementes da área de maior concentração de cobre no solo (minas do Seival) apresentam sintomas de toxidez mais tardios do que plántulas provenientes de sementes da área de menor concentração deste íon (mina Sanga Negra).

Palavras-chave: tolerância a cobre, Schinus lentiscifolius, áreas de mineração.


ABASTRACT

Seeds from Schinus lentiscifolius March collected in two mining areas in the state of Rio Grande do Sul, Brazil, were submitted to CuSO4 exposure tests to confirm copper tolerance during germination .and plantule development. The results showed that the two distinct clones respond differently to copper, but both presented tolerance mechanisms. Plantules originated from seeds collected in the area with higher soil copper concentration (minas do Seival) presented toxicity symptoms later as compared to those plantules originated from seeds collected in the area with lower CU2 + concentration (mina Sanga Negra).

Key Words: Copper toleleance, Schinuslentiscifolius, mining areas.


 

 

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Full text available only in PDF format.

 

 

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Recebido em 28-01-89.
Aceito em 08-11-98.

 

 

* Parte da tese de doutorado desenvolvida na Universidade de Ulm, República Federal da Alemanha.

 

 


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