Artículos de revistas
Effect of daily exposure to PB-contaminated water of Salvinia biloba physiology and phytoremediation performance
Fecha
2019Registro en:
0166-445X (impreso)
1879-1514 (online)
10.1016/j.aquatox.2019.02.019
Autor
Castillo Loria, Kristel
Emiliani, Julia
Bergara, Claudia Daniela
Herrero, María Sol
Salvatierra, Lucas Matías
Pérez, Leonardo Martín
Institución
Resumen
Abstract: Lead (Pb) removal from water column was evaluated in batch experiments using
naturally occurring Salvinia biloba Raddi (S. biloba) specimens collected from Middle
Paraná River and exposed every 24 h to a fresh discharge of water contaminated with
2.65±0.07, 12.62±0.02 or 30.57±0.01 mg L-1 Pb, during 10 consecutive days.
S. biloba demonstrated a great ability for metal concentration-dependent Pb removal
under these stressful conditions. Additionally, Pb toxicity in plants was assessed by the
quantification of physiological parameters in root-like modified fronds (named “roots”),
and its aerial leaf-like fronds (named “leaves”) of submerged S. biloba. Photosynthetic
(carotenoids, chlorophyll a, b, and total) and antioxidant pigments (anthocyanins and
flavonoids), soluble carbohydrate content, and membrane stability index of both roots
and leaves were affected as the metal concentration increased. In general, root
deterioration was more pronounced than that in leaves, suggesting a greater implication
of the former organs in Pb removal by S. biloba. All of these deleterious effects were
well correlated with qualitative changes observed at plant phenotype during the assay.
In conclusion, S. biloba may be considered as a water fern useful in phytoremediation strategies towards management of residual water bodies contaminated with Pb. In
addition, these macrophytes could also be valuable for water biomonitoring contributing
to improve risk assessments related to metal presence in wastewaters.