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Type: Artigo de periódico
Title: Effect of excess cadmium and zinc ions on roots and shoots of maize seedlings
Author: Souza, JF
Dolder, H
Cortellazzo, AL
Abstract: The effect of 8-day-old exposure maize seedlings with cadmium (Cd) or zinc (Zn), separately, are described with special attention being given to ultrastructural changes as well as changes of the growth. These elements, frequent pollutants found in the soil, were added as I mM solutions to nutrient solution used for roots and shoots of maize seedlings, investigated 8 days after germination. The symptoms of heavy metal toxicity were clear showing that Cd inhibits root growth more strongly than the shoots and more effectively than zinc ions. The results of scanning electron microscopy revealed changes in the leaf surface, particularly in the guard cells of the stomata. The ultrastructural analyses of the parenchyma mesophyll cells showed extensive chloroplast disorganization, mainly affecting the thylakoid membranes and grana.
Subject: heavy metals
Country: EUA
Editor: Taylor & Francis Inc
Citation: Journal Of Plant Nutrition. Taylor & Francis Inc, v. 28, n. 11, n. 1923, n. 1931, 2005.
Rights: fechado
Identifier DOI: 10.1080/01904160500310435
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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