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首页> 外文期刊>Acta Horticulturae >Mechanisms of phytoextraction in Cynara cardunculus L growing under cadmium and arsenic stress
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Mechanisms of phytoextraction in Cynara cardunculus L growing under cadmium and arsenic stress

机译：镉和砷胁迫下小菜蛾生长的植物提取机制

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Phytoextraction is a remediation strategy, which employs plants to remove heavy metals and other contaminants from the soil. The aim of this study was to evaluate the ability of the cardoon (Cynara cardunculus L. var. altilis) to grow under cadmium (Cd) and arsenic (As) stress and accumulate them in tissues. Pot trials were carried out under controlled environment conditions and were exposed to As (0, 6.5, 13 mM), Cd (0, 6.5, 13 mM) and As+Cd (0+0, 6.5+6.5, 13+13 mM) up to 60 days. In cardoon, the biomass production and Cd and As concentrations were determined in 4 different stages of the biological cycle in different parts of plant. Under Cd treatment, the Cd concentration decreased in the roots while increased in the leaves over time. After 15 days of treatment, the plants treated with As, showed a severe reduction in the production of biomass. The growth is inhibited at high doses of this element and the plants died. The results show a rapid uptake of arsenic by the roots and its accumulation inthe aerial parts of the plant. The As concentration in cardoon tissues increased with increasing As concentration. In the combined Cd and As treatments the plants improved resistance to As and Cd. The presence of Cd increased the ability of cardoon to translocate As from the root to the shoot. Also cardoon in Cd+As treatment was more tolerant to As (up to 45 days) compared to As alone and increased its ability to phytoextraction.
机译：植物提取是一种补救策略，该策略采用植物从土壤中去除重金属和其他污染物。这项研究的目的是评估菜豆（Cynara cardunculus L. var。altilis）在镉（Cd）和砷（As）胁迫下生长并将其积累在组织中的能力。盆栽试验在受控的环境条件下进行，并暴露于As（0，6.5，13 mM），Cd（0，6.5，13 mM）和As + Cd（0 + 0，6.5 + 6.5，13 + 13 mM）长达60天。在菜豆中，在植物的不同部位的生物循环的四个不同阶段中测定了生物量产生量以及Cd和As浓度。在镉处理下，随着时间的流逝，根中的Cd浓度降低而叶片中的Cd浓度升高。处理15天后，用As处理过的植物显示出生物量产生的严重减少。高剂量的这种元素的生长被抑制，植物死亡。结果表明，根部快速吸收了砷，并在植物的空中吸收了砷。 card菜组织中的砷浓度随砷浓度的增加而增加。在镉和砷的联合处理中，植物提高了对砷和镉的抗性。 Cd的存在增加了菜豆将As从根部转移到芽的能力。与单独使用As相比，Cd + As处理中的菜豆对As的耐受性最高（长达45天），并增加了其植物提取的能力。

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