植物营养与肥料学报2012，Vol.18Issue(6)：1499-1506,8.
不同光强下龙葵对镉的吸收积累及生理响应
Cd bio-accumulative characteristics and physiological response of Solanum nigrum L. under different light intensities
摘要
Abstract
Under different light intensities (natural light and 50% shading), bioaccamulation of Cd, activities of antioxidative enzymes (SOD, POD, CAT and APX), and contents of chlorophyll, MDA, GSH and PCs of Solanum nigrum L. with different Cd concentration treatments (0, 25, 50, 75 and 100 mg/kg) were investigated. The results show that the contents of chlorophyll b and a + b of leaves of S. nigrum L. and Cd accumulations in shoots and roots of S. nigrum L. grown under the natural light the increase of Cd concentration, the activities of SOD, are significantly lower than those under the shading. With POD, CAT and APX in leaves and roots of S. nigrum L. are decreased after an initial increase under the natural light, while those grown under the shading environment are increased consistently. The root POD activity and leaf CAT activity under the treatment of 25 mg/kg Cd have no significant differences between the natural light and the shading environment, however, in the treatments of the other Cd concentrations, the activities of SOD, POD, CAT and APX of leaves and roots of S. nigrum L. grown under the natural light are significantly higher than those under the shading. The MDA contents in leaves and roots of S. nigrum L. under the high light are significantly higher than those under the shading environment, while the GSH and PCs contents in leaves and roots of S. nigrum L. under the natural light are significantly lower than those under the shading environment. These results indicate that the shading environment promotes the Cd accumulationof S. nigrum L. and reduces the oxidative stress of Cd to S. nigrum L.关键词
镉/龙葵/光强/抗氧化酶/植物螯合肽Key words
Cd/Solanum nigrum L./light intensity/antioxidative enzyme/phytochelatin分类
农业科技引用本文复制引用
杜照奎,王江..不同光强下龙葵对镉的吸收积累及生理响应[J].植物营养与肥料学报,2012,18(6):1499-1506,8.基金项目
国家自然科学基金项目 （）
浙江省自然科学基金项目 （）
浙江省教育厅科研项目 （）
台州学院2011年校立项目（2011PYl5）资助. （）
