Artículos de revistas
Assessment of the root system of Brassica juncea (L.) Czern. and Bidens pilosa L. exposed to lead polluted soils usin rhizobox systems
Graziani, Natalia Soledad; Salazar, María Julieta; Pignata, Maria Luisa; Rodriguez, Judith del Valle; Assessment of the root system of Brassica juncea (L.) Czern. and Bidens pilosa L. exposed to lead polluted soils usin rhizobox systems; Taylor & Francis; International Journey of Phytoremediation; 18; 3; 8-2015; 235-244
Graziani, Natalia Soledad
Salazar, María Julieta
Pignata, Maria Luisa
Rodriguez, Judith del Valle
The purpose of this study was to compare the behavior of the root system of one of the most frequently cited species in phytoremediation Indian mustard [Brassica juncea (L.) Czern.] and a representative perennial herb (Bidens pilosa L.) native of Argentina, for different concentrationsof lead in soils through chemical and visualization techniques of the rhizosphere. Lead polluted soils from the vicinity of a lead recycling plant in the locality of Bouwer, were used in juxtaposed rhizobox systems planted with seedlings of B. juncea and B. pilosa with homogeneous and heterogeneous soil treatments. Root development, pH changes in the rhizosphere, dry weight biomass, lead content of root and aerial parts and potential extraction of lead by rhizosphere exudates were determined. In both species lead was mainly accumulated in roots. However, although B. juncea accumulated more lead than B. pilosa at elevated concentrations in soils, the latter achieved greater root and aerial development. No changes in thepH of the rhizosphere associated to lead were observed, despite different extractive potentials of lead in the exudates of the species analyzed. Our results indicated that Indian mustard did not behave as a hyperaccumulator in the conditions of the present study.