Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/32660
Título : Anatomical and physiological responses of Billbergia zebrina (Bromeliaceae) to copper excess in a controlled microenvironment
Autor: Martins, João Paulo Rodrigues
Martins, Adalvan Daniel
Pires, Marinês Ferreira
Braga Junior, Roberto Alves
Reis, Renan Oliveira
Dias, Gabrielen de Maria Gomes
Pasqual, Moacir
Palavras-chave: Biological activity
Bromeliad
In vitro culture
Plant anatomy
Plant physiology
Atividade biológica
Bromeliácea
Cultura in vitro
Anatomia vegetal
Fisiologia vegetal
Publicador: Springer
Data da publicação: Jul-2016
Referência: MARTINS, J. P. R. et al. Anatomical and physiological responses of Billbergia zebrina (Bromeliaceae) to copper excess in a controlled microenvironment. Plant Cell, Tissue and Organ Culture, Dordrecht, v. 126, n. 1, p. 43-57, July 2016.
Abstract: Copper (Cu) plays crucial biochemical and physiological functions in plants. However, at high concentrations, Cu can become extremely toxic, inducing several physiological changes and symptoms of toxicity. The aim was to analyze the anatomical and physiological changes of the bromeliad, Billbergia zebrina, in response to Cu excess under in vitro conditions. B. zebrina plants, previously established in vitro, were transferred to culture media containing 0, 2, 20, or 200 µM Cu. Growth traits and enzyme activity of superoxide dismutase and ascorbate peroxidase were measured over a period of 80 days. To verify the biological activity of roots grown under different Cu concentrations, a biospeckle laser was used at 20 and 80 days. Biomass accumulation, Cu content and anatomical analyses were performed at 80 days. Plants did not show any visible signs of disturbance and all plants survived the experimental treatments. Plants grown with 200 µM Cu showed anatomical changes, such as increased stomatal index and thicker exodermal cell walls of the roots, which may aid in heavy metal tolerance. High biological activity was observed only at 20 days. This biological activity was linked to increased thickness of the cell wall at the exodermis. The Cu content evidenced that the anatomical changes were effective against the transport of excess Cu into the plants. Although Cu exposure affected leaf and root anatomy as well as growth, exposure only induced minimal changes in the antioxidant system. B. zebrina tolerates high amounts of Cu and could potentially be used as a bioindicator species.
URI: https://link.springer.com/article/10.1007/s11240-016-0975-8
http://repositorio.ufla.br/jspui/handle/1/32660
Idioma: en_US
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