安徽农业科学2011，Vol.39Issue(34)：21262-21264,3.
土培条件下东南景天对镉的耐性和富集特性的研究
Study on Tolerance and Enrichment Characteristics of Sedum alfredii Hance to Cd in Soil Culture
摘要
Abstract
[Objective] To reveal the differences of tolerance and uptake characteristics of cadmium in soil between mined ecotype and nonmined plants of 5. Alfredii. [ Method ] Using pot culture, different amount of Cd were put into soil as treatment, to study the growth responses of two ecotypes plants of S. Alfredii in soil with different Cd content and the change of Cd content and accumulation. [ Result] The growth responses were different obviously between the two plants. The tolerance threshold of mined ecotype S. Alfredii to Cd was 300 rag/kg, and the non-mined ecotype was SO mg/kg. Maximum Cd concentrations reached 893 rag/kg in shoots and 344 mg/kg in roots of the mined ecotype plant respectively; while the maximum Cd concentration in shoots was 124 mg/kg, the root was 212 mg/kg for the non-mined ecotype plant. Cd concentration in shoots was higher than roots for the mined ecotype, whereas Cd concentration was always lower in shoots than in roots for the non-mined ecotype. The Cd accumulation in shoots of the mined ecotype reached the maximum of 151.67 μ/plant, while the non-mined ecotype reached 11.99 μg/plant. Compare the two ecotypes of 5. Alfredii, concentration and accumulation of Cd in shoots of the mined ecotype was obviously higher than the non-mined ecotype in same content treatment of Cd in soil. [Conclusion] Cd tolerance and accumulation of the mined ecotype of S. Alfredii is remarkably more than the non-mining ecotype. The mined ecotype of S. Alfredii is a Cd hyperaccumulator.关键词
东南景天/盆栽试验/镉/耐性Key words
S. Alfredii/ Pot experiment/ Cadmium/ Tolerance分类
农业科技引用本文复制引用
熊愈辉..土培条件下东南景天对镉的耐性和富集特性的研究[J].安徽农业科学,2011,39(34):21262-21264,3.基金项目
湖州师范学院2011年校级科研项目(KX27040) （KX27040）
湖州师范学院人才科研启动资金资助项目(RK23025). （RK23025）
