En este estudio se analizó la tolerancia de cinco especies de Cistus al contenido de metales pesados de dos suelos contaminados de la Sierra Minera de La Unión. Los resultados mostraron que el suelo 1 presentó una elevada toxicidad para las especies de Cistus, debido al alto contenido de metales pesados y a su alta salinidad. El suelo 2 presentó niveles menores de metales pesados totales pero un pH más ácido y por tanto los elementos minerales estaban en formas más solubles y disponibles en el suelo. Los resultados indican que algunas plantas de Cistus podrían ser utilizadas para la recuperación de suelos mineros ya que acumularon altos niveles de metales. Sin embargo, su escaso crecimiento hacen necesario diseñar estrategias que permitan su utilización en procesos de fitoestabilización.Palabras clave: Cistaceae, Fitoestabilización, Suelos mineros. Tolerance and accumulation of heavy metals and As in different species of Cistus L. AbstractIn this study the tolerance of five species of Cistus on the presence of heavy metals in two polluted soils of the Sierra Minera de La Union were analysed. The results indicated that the soil 1 provoked a high toxicity in Cistus species due to its high content of heavy metals and salinity. The soil 2 contained lower concentrations of total metal that soil 1 and an acidic pH and therefore, the mineral elements were more soluble and available in the soil. The results indicated that Cistus plants could be used for the recovery of contaminated soils since these plants accumulated high concentrations of metals. However, due to their slow growth, it is necessary to design new strategies which allow their use in phytostabilization processes.
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