农业环境科学学报2012，Vol.31Issue(7)：1296-1302,7.
野茼蒿对镉的富集及其镉耐性
Cadmium Tolerance and Accumulation Characteristics of Crassocephalum crepidioides
摘要
Abstract
Phytoremediation of soil heavy metals is generally considered as a clean and economical method of bioremediation. In this study, a pot experiment was used to investigate growth responses and Cd accumulation of Crassocephalum crepidioides, under treatments of Cd concentration gradient at 0~180 mg·kg‐1. With the increasing of Cd-spiked level, main root length, plant height, chlorophyll content and root-shoot biomass of C. crepidioides decreased, and compared to the control treatment, main root length, plant height and root & shoot biomass decreased significantly. When the Cd-spiked level increased, Cd concentration in the root and shoot of C. crepidioides increased remarkably, while the total amount of Cd accumulation in the root and shoot at first increased and then decreased, but still much higher than the control. In the shoot of C. crepidioides, Cd concentration was highest( 1 288.12 mg · kg‐1) at the Cd-spiked level of 180 mg · kg‐1, and Cd accumulation reached the biggest amount(4.28 mg·pot‐1) when Cd was spiked at 60 mg·kg‐1. C. crepidioides could grow normally without visible symptoms of Cd toxicity under treatments of Cd-spiked concentrations ≤ 90 mg ‐· kg"1. The bioconcentration factor and translocation factor in the shoot were 3.48~21.71 and 1.12~2.31, respectively. These results indicated that C. crepidioides showed strong capability in tolerance,accumulation and transport of Cd, and it could be used for Cd-phytoremediation.关键词
野茼蒿/镉/耐性/富集Key words
Crassocephalum crepidioides/ cadmium/ tolerance/ accumulation分类
资源环境引用本文复制引用
李云,张世熔,张少卿,邓良基,李婷,徐小逊..野茼蒿对镉的富集及其镉耐性[J].农业环境科学学报,2012,31(7):1296-1302,7.基金项目
科技部科技支撑计划(2008BAK51B01) （2008BAK51B01）
四川公益性科技攻关专项(2007NGY006) （2007NGY006）
博士专项(01470404) （01470404）
