不同基因型的青菜、白菜耐镉性差异研究

通过溶液培养,对重金属镉(Cd)处理下不同品种的青菜和白菜地上部可食部分的生物量以及对镉的吸收和积累特点进行了比较研究.结果表明:在50μmol/L的Cd处理下,青菜和白菜的生长均受到不同程度的抑制作用,其地上部的生物量均显著低于对照,青菜对Cd具有较强的敏感性,其相对生物量均下降到对照的50%以下,白菜对Cd的耐性高于青菜;镉处理下,不同品种的青菜和白菜对镉的吸收积累具有显著性差异,青菜单位重量的Cd含量明显高于白菜;对青菜和白菜进行了镉耐性和敏感性品种筛选,为无公害蔬菜的种植及镉污染土壤的植物修复提供理论参考.

Studies on Cadmium Tolerance between Brassica chinensis L.and Brassica pekinensis Rupr. of Different Genetic Groups

Conducted solution culture experiments to carry out a comparative research concerning the decrease of edible above-ground biomass and Cadmium accumulation in Brassica chinensis L.and Brassica pekinensis Rupr.of different genetic groups which were treated with Cadmium.The test showed that: the growth of the treated plants was restrained to different degree after the treatment of Cadmium(50 mol/L) and the decrease of above-ground biomass was remarkable in contrast to the untreated cultivars.Besides,as the experiment showed,Brassica chinensis L.could be easily affected and the above-ground biomass of all the samples decreased by more than 50%,while the decrease of Brassica pekinensis Rupr.,in comparison,was much lower which suggests that the Brassica pekinensis Rupr.had stronger tolerance to Cadmium than Brassica chinensis L.The paper also indicated the obvious difference in Cadmium accumulation between the treated Brassica chinensis L.and Brassica pekinensis Rupr.of different varieties.Besides,the Cd content in Brassica chinensis L.of unit weight was obviously more than that of Brassica pekinensis Rupr.It is expected that the research finding of this paper will provide theoretical reference for the selection of excellent varieties according to their Cadmium tolerance and sensitivity,for environment-safety vegetable planting as well as for the restoration of plants grown in Cadmium-polluted soil.