Structural and Ecophysiological Alterations of the Water Hyacinth [Eichhornia crassipes (Mart.) Solms] Due to Anthropogenic Stress in Brazilian Rivers

Autor(es)

Vitoria, Angela Pierre ^[1] ; Lage-Pinto, Frederico ^[1] ; Campaneli da Silva, Leonardo Bernardo ^[1] ; da Cunha, Maura ^[2] ; de Oliveira, Jurandi Goncalves ^[3] ; Rezende, Carlos Eduardo ^[1] ; Magalhaes de Souza, Cristina Maria ^[1] ; Azevedo, Ricardo Antunes ^[4]

Afiliação do(s) autor(es)

^[1] Univ Estadual Norte Fluminense, Ctr Biociencia & Biotecnol, Lab Ciencias Ambientais, Campos Dos Goytacazes, RJ - Brazil

^[2] Univ Estadual Norte Fluminense, Ctr Biociencia & Biotecnol, Lab Biol Celular & Tecidual, Campos Dos Goytacazes, RJ - Brazil

^[3] Univ Estadual Norte Fluminense, Ctr Ciencias & Tecnol Agr, Lab Melhoramento Genet Vegetal, Campos Dos Goytacazes, RJ - Brazil

^[4] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Dept Genet, Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Archives of Biology and Technology; v. 54, n. 5, p. 1059-1068, SEP-OCT 2011.
• Citações Web of Science: 3

Resumo

In this work, the structural and ecophysiological alterations (chlorophyll a fluorescence and photosynthetic pigments), and quantification of Cr, Pb and Zn in the leaf limb, petiole and younger and older roots of water hyacinth from the lower, medium and upper Paraiba do Sul river (PSR) and Imbe river were evaluated. The plants from the medium and upper PSR (more industrialized and populated regions) exhibited lower turgid cell in the root cortex, less root hairs and leaf epidermis, chloroplasts with plastoglobules and increased stroma volume. Higher concentrations of metals were observed in the younger and older roots from the medium PSR plants. The results suggested that the plants from more anthropized regions were able to maintain the maximum quantum yield (F(v)/F(m)) which was a result from the metabolic fitting, increasing the non-photochemical quenching, reducing total chlorophyll/carotenoids and leading to the structural modifications. (AU)

• Processo FAPESP: 04/15012-5 - Vegetacao e metais pesados: estudo no rio paraiba do sul.
• Beneficiário: Ricardo Antunes de Azevedo
• Modalidade de apoio: Auxílio à Pesquisa - Regular