Artículo
Response of pistia stratiotes to heavy metals (Cr, Ni, and Zn) and phosphorous
Fecha de publicación:
01/2010
Editorial:
Springer
Revista:
Archives of Environmental Contamination and Toxicology
ISSN:
0090-4341
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The effects of Cr, Ni, Zn, and P exposure on the root anatomic structure, growth, and chlorophyll a concentration of Pistia stratiotes L. were studied. Plastic aquaria containing 50 g of wet plants and 5 L of pond water added with the contaminant(s) were disposed. The treatments were: (1) Cr, (2) Ni, (3) Zn, (4) P, (5) Cr + Ni + Zn, (6) Cr + Ni + Zn + P, and (7) control. Contaminant additions were done seven times. In each addition, concentrations of 1 mg of metals or 5 mg of P per liter of water were added. Chlorophyll a was an indicator more sensitive to Zn and Cr toxicity than the relative growth rate. Ni and Cr + Ni + Zn treatments were the most toxic ones, in which biomass and the root anatomical parameters (root length, cross-sectional areas [CSAs] of root, stele, and metaxylem vessels) decreased significantly. The addition of P to the treatment with combined metals attenuated the decrease in plant growth and root length, and caused a significant increase in CSAs of total metaxylem vessels, suggesting that P increased the tolerance of P. stratiotes to metals. This fact has important implications for the use of this macrophyte in constructed wetlands for industrial wastewater treatment.
Palabras clave:
MACROPHYTE
,
CONTAMINANTS
,
MORPHOLOGY
,
PHYTOREMEDIATION
,
WETLAND
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Citación
Mufarrege, María de Las Mercedes; Hadad, Hernán Ricardo; Maine, Maria Alejandra; Response of pistia stratiotes to heavy metals (Cr, Ni, and Zn) and phosphorous; Springer; Archives of Environmental Contamination and Toxicology; 58; 1; 1-2010; 53-61
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