Effect of silicon on reducing cadmium toxicity in durum wheat (Triticum turgidum L. cv. Claudio W.) grown in a soil with aged contamination.
Agricultural soil contamination and subsequently crops still require alternative solutions to reduce associated environmental risks. The effects of silica application on alleviating cadmium (Cd) phytotoxicity in wheat plants were investigated in a 71-day pot experiment conducted with a historically contaminated agricultural soil. We used amorphous silica (ASi) that had been extracted from a diatomite mine for Si distribution at 0, 1, 10 and 15 ton ASi ha(-1). ASi applications increased plant biomass and plant Si concentrations, reduced the available Cd in the soil and the Cd translocation to shoots, while Cd was more efficiently sequestrated in roots. But ASi is limiting for Si uptake by plants. We conclude that significant plant-available Si in soil contributes to decreased Cd concentrations in wheat shoots and could be implemented in a general scheme aiming at controlling Cd concentrations in wheat.
Aix-Marseille Université, Centre National de la Recherche Scientifique, Institut pour la Recherche et le Développement, Collège de France, CEREGE (Centre Européen de Recherche et d'Enseignement en Géosciences de l'Environnement), 13454 Aix-en-Provence, Cedex 4, France. rizwan@cerege.fr
Muhammad
M
Rizwan
Jean-Dominique
JD
Meunier
Hélène
H
Miche
Catherine
C
Keller
D018533:Biomass; D002104:Cadmium / Q000378:metabolism / Q000633:toxicity*; D006863:Hydrogen-Ion Concentration; D012825:Silicon / Q000737:chemistry*; D012989:Soil Pollutants / Q000378:metabolism / Q000633:toxicity*; D014908:Triticum / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism
D012989:Soil Pollutants; D002104:Cadmium; D012825:Silicon