title: ECO-physiological response of S. vulgaris to CR(VI): Influence of concentration and genotype.
abstract: The objective of this work is to study the response of Silene vulgaris to a range of environmentally relevant concentrations of Cr(VI) in order to evaluate its potential use in the phytomanagement of Cr polluted sites. Cuttings of six homogenous genotypes from Madrid (Spain) have been used as plant material. The eco-physiological response of S. vulgaris to Cr(VI) changed with the genotype. The yield dose-response curve was characterized by stimulation at low doses of Cr(VI). The effects of metal concentration were quantified on root dry weight, water content and chlorophyll content, determined by SPAD index. The response was not homogeneous for all studied genotypes. At high doses of Cr(VI), plants increased micronutrient concentration in dry tissues which suggested that nutrient balance could be implicated in the alleviation of Cr toxicity. This work highlights the importance of studying the eco-physiological response of metallophytes under a range of pollutant concentrations to determine the most favorable traits to be employed in the phytomanagement process.
authors.affiliation: a Dpto. de Investigación Agroambiental. IMIDRA , Finca "El Encín" , Alcalá de Henares, Madrid , Spain.
authors.forename: Ana E
authors.initials: AE
authors.lastname: Pradas Del Real
authors.affiliation: a Dpto. de Investigación Agroambiental. IMIDRA , Finca "El Encín" , Alcalá de Henares, Madrid , Spain.
authors.forename: Pilar
authors.initials: P
authors.lastname: García-Gonzalo
authors.affiliation: a Dpto. de Investigación Agroambiental. IMIDRA , Finca "El Encín" , Alcalá de Henares, Madrid , Spain.
authors.forename: M Mar
authors.initials: MM
authors.lastname: Gil-Díaz
authors.affiliation: a Dpto. de Investigación Agroambiental. IMIDRA , Finca "El Encín" , Alcalá de Henares, Madrid , Spain.
authors.forename: Águeda
authors.initials: Á
authors.lastname: González-Rodríguez
authors.affiliation: a Dpto. de Investigación Agroambiental. IMIDRA , Finca "El Encín" , Alcalá de Henares, Madrid , Spain.
authors.forename: Carmen
authors.initials: C
authors.lastname: Lobo
authors.affiliation: a Dpto. de Investigación Agroambiental. IMIDRA , Finca "El Encín" , Alcalá de Henares, Madrid , Spain.
authors.forename: Araceli
authors.initials: A
authors.lastname: Pérez-Sanz
mesh_terms: D001673:Biodegradation, Environmental; D029748:Caryophyllaceae / Q000737:chemistry / Q000145:classification / Q000235:genetics / Q000378:metabolism*; D002734:Chlorophyll / Q000032:analysis / Q000378:metabolism; D002857:Chromium / Q000032:analysis / Q000378:metabolism*; D005838:Genotype; D018517:Plant Roots / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D012989:Soil Pollutants; D002857:Chromium; D002734:Chlorophyll; C074702:chromium hexavalent ion
keywords: metal tolerance; metallophyte; micronutrient status; phytomanagement; soil pollution