INCREASED CONCENTRATION OF SOIL CADMIUM AFFECTS ON PLANT GROWTH, DRY MATTER ACCUMULATION, Cd, AND Zn UPTAKE OF DIFFERENT TOBACCO CULTIVARS (NICOTIANA TABACUM L.)
INCREASED CONCENTRATION OF SOIL CADMIUM AFFECTS ON PLANT GROWTH, DRY MATTER ACCUMULATION, Cd, AND Zn UPTAKE OF DIFFERENT TOBACCO CULTIVARS (NICOTIANA TABACUM L.)
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DOI：
10.1080/15226510802378400
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发表时间：
2009-02
影响因子：
3.7
通讯作者：
S. Vasiliadou;C. Dordas
中科院分区：
文献类型：
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作者：
S. Vasiliadou;C. Dordas
镉（Cd）是一种对人类、动物和植物有毒的微量金属污染物。烟草是一种高效的镉积累植物，其镉吸收和对镉的反应的基因型差异尚未确定。研究了Cd对不同烟草品种生长发育的影响;不同烟草品种对Cd的吸收、富集及利用Cd修复污染土壤的差异; Cd和Zn在吸收、富集方面的相互作用。镉水平影响叶片数和干物质积累，且不同品种间存在差异。此外，一些品种表现出更高的增长比别人，表明他们更敏感的镉水平在土壤中。不同品种对Cd的吸收和富集存在差异。Cd和Zn含量之间也呈负相关，随着Cd积累量的增加，Zn积累量减少，表明两种重金属具有拮抗作用。这些结果表明，烟草品种的生长发育对镉的反应以及镉和锌的浓度和吸收存在很大差异。此外，还可以利用某些烟草品种来降低土壤中的Cd浓度。
Cadmium (Cd) is a toxic trace metal pollutant for humans, animals, and plants. Tobacco is a wellknown efficient accumulator of Cd and the genotypic differences in Cd uptake and the response to Cd was not determined. The objectives of this study were to investigate: 1) the effects of Cd on the growth and development of different tobacco cultivars; 2) the differences among tobacco cultivars in Cd concentration, uptake, and use for the phytoremediation of polluted soils with Cd; and (3) the interactions between Cd and Zn with respect to concentration and uptake. The Cd level affected the number of leaves and dry matter accumulation, and there were differences among the different cultivars that were used. Furthermore, some cultivars showed a higher reduction in growth than others, indicating that they are more sensitive to Cd level in the soil. Moreover, differences existed among the cultivars for the Cd concentration and uptake. There also were negative correlations between Cd and Zn concentrations; as Cd accumulation increased, Zn accumulation decreased, which showed that the two heavy metals were antagonistic. These results suggest that tobacco cultivars differed greatly in their growth and developmental responses to Cd and in the concentration and uptake of Cd and Zn. In addition, it is possible to use certain tobacco cultivars to lower the Cd concentration in the soil.