摘要：The different peanut varieties have different response to cadmium (Cd) stress, while the mechanisms underlying the Cd tolerance are largely unknown.To investigate the antioxidant enzyme activities, Cd uptake and translocation, as well as Cd tolerance accumulation in four peanut cultivars under 0, 5, 10, 20, 40, and 80 pmol/L CdCl2, a hydroponic experiment was conducted under controlled conditions.Cultivars differences were found in root malondialdehyde (MDA) content, antioxidant enzyme activities, Cd concentration in shoots and roots, Cd translocation to shoots and Cd accumulation in shoots and roots of peanut plants exposure to CdCl2.Comparing genotypes, BS1106 and RH2 displayed the relative higher MDA and root membrane permeability, Cd concentration in shoots and roots, Cd translocation to shoots and Cd accumulation in shoots and roots, while relative lower antioxidant enzyme activities.Low uptake and internal distribution may be responsible for the variation in Cd accumulation among peanut cultivars.The Cd accumulation was much low in FH3 compared with the other three cultivars, suggesting that FH3 have lower capability of Cd accumulation.
