Abstract
High level Cd-accumulation in plant without toxicity is a specific and rare phenomenon known in only a few wild species. Further investigations on Cd-accumulation can contribute to the application of phytoremediation. In this point of view, we analyzed the characteristics of Cd accumulation and tolerance in Vicia villosa, a green manure crop. Two cultivars of V. villosa, two Vicia species and five legumes were treated with 50μM Cd hydroponically for 4 days. V. villosa represented higher Cd-accumulation than other legumes did. When V. villosa was grown under different Ca conditions (0.5-3mM) with 100μM Cd, 3mM Ca treatment enhanced the Cd accumulation and alleviated Cd toxicity in leaves. In 3mM Ca treatment, V. villosa showed drastic accumulation of both Cd and Ca after the 4th day of Cd treatment. Involvement of Ca accumulation pathways in Cd uptake by V. villosa was also examined
