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Title

Effects of silicon on copper toxicity in Erica andevalensis Cabezudo and Rivera: a potential species to remediate contaminated soils

AuthorsRossini Oliva, S.; Mingorance, M. Dolores; Leidi, Eduardo O.
Issue Date2011
PublisherRoyal Society of Chemistry (UK)
CitationJournal of Environmental Monitoring 13(3): 591-596 (2011)
AbstractThe influence of silicon on responses to copper excess was studied in plants of Erica andevalensis. Plantlets were grown in nutrient solutions containing two Cu (1 and 500 M) and three Si concentrations (0, 0.5 and 1 mM). Plant growth, water content, and mineral nutrient concentration were determined. Plants grown with 500 M Cu showed differences in growth and shoot water content depending on Si supply. The addition of 1 mM Si in high-Cu nutrient solutions significantly improved plant growth and reduced water loss preventing plant death related to Cu-excess. Silicon supply reduced significantly leaf Cu concentration (up to 32%) and increased Cu concentration in roots. Phytoliths isolated from leaves were analysed by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy. Such phytoliths consisted in silica deposits associated with Cu and other elements (K, Ca, P). Improvement by Si of Cu tolerance in E. andevalensis was clearly related to the inhibition of Cu upward transport. The leaf phytoliths formed in Si-treated plants might have some contribution to tolerance by Cu immobilisation and inactivation.
Publisher version (URL)http://dx.doi.org/10.1039/c0em00549e
URIhttp://hdl.handle.net/10261/62208
Identifiersdoi: 10.1039/c0em00549e
issn: 1464-0325
e-issn: 1464-0333
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