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蓟对单一和复合镉镍处理条件的响应。

Responses of Cynara cardunculus L. to single and combined cadmium and nickel treatment conditions.

机构信息

Department of Natural Resources Management and Agricultural Engineering, Agricultural University of Athens, 75 Iera Odos Street, Athens, Greece.

出版信息

Ecotoxicol Environ Saf. 2011 Feb;74(2):195-202. doi: 10.1016/j.ecoenv.2010.06.026. Epub 2010 Aug 24.

Abstract

A greenhouse pot experiment was carried out to study the responses of Cynara cardunculus L. (cardoon) to cadmium and nickel. Three groups of 12 pots each were planted with cardoon plants and spiked with single and combined cadmium and nickel aqueous solutions. The bioavailable metal concentrations, measured in soil, ranged widely and were up to 246.7 mg kg⁻¹ for Cd and 61.1 mg kg⁻¹ for Ni. Under Cd treatment, cardoon growth remained unaffected, while increased Ni soil concentrations inhibited plant growth and were lethal to the highly treated plants. In the combined Cd and Ni treatments, an antagonistic effect was observed between the two metals. Cadmium and nickel concentrations in cardoon tissues rose with increasing metal concentrations in the soil. Cadmium and nickel contents in shoots reached 169.3 and 342.3 mg kg⁻¹ in the single treatments while, under the combined Cd and Ni treatments, they were up to 235.0 and 440.7 mg kg⁻¹, respectively. Generally, mean contents of both metals in the shoots were higher than in the roots and the translocation factor was greater than 1. A possible enhancing effect of nickel on cadmium uptake was observed. Cardoon showed characteristics of a Cd accumulator.

摘要

采用温室盆栽试验研究了镉镍单一及复合胁迫对菜蓟(Cynara cardunculus L.)的影响。每组 12 盆菜蓟,共 3 组,分别用添加镉镍单一及复合水溶液的土壤进行盆栽。土壤中有效态金属浓度范围较宽,镉为 246.7 mg kg⁻¹,镍为 61.1 mg kg⁻¹。镉处理对菜蓟生长无影响,而增加的镍土壤浓度则抑制植物生长,高浓度镍处理对植物具有致死作用。在镉镍复合处理中,两种金属之间表现出拮抗作用。菜蓟组织中的镉镍浓度随土壤中金属浓度的增加而升高。在单一处理中,菜蓟地上部的镉镍含量分别达到 169.3 和 342.3 mg kg⁻¹,而在镉镍复合处理中,其含量分别高达 235.0 和 440.7 mg kg⁻¹。通常,两种金属在地上部的平均含量均高于根部,且迁移系数均大于 1。观察到镍可能增强了镉的吸收。菜蓟表现出镉积累的特性。

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