【摘要】：為了強化鎘富集植物繁縷對鎘污染土壤的修復(fù)效率,采用盆栽試驗,研究了噴施不同濃度赤霉素(GA_3)對繁縷生長及鎘積累的影響。結(jié)果表明,繁縷的生物量隨GA_3濃度的增加而增加,但光合色素含量、抗氧化酶(SOD、POD和CAT)活性、可溶性蛋白含量、可溶性糖含量、鎘含量及鎘積累量均呈先增后降的趨勢。在GA_3濃度為10 mg L~(-1)時,繁縷地上部分及整株鎘積累量均達到最大值,分別為244.86、348.97μg plant~(-1),較各自對照分別增加了31.20%(P0.05)和25.51%(P0.05)。因此,采用繁縷修復(fù)鎘污染土壤時,以10 mg L~(-1)的GA_3提高繁縷的修復(fù)效率最佳,可作為植物修復(fù)的強化措施。
[Abstract]:In order to enhance the remediation efficiency of cadmium enriched plants, pot experiments were conducted to study the effects of different concentrations of gibberellin (GA_3) on the growth and accumulation of cadmium. The results showed that the biomass of Zoysia increased with the increase of GA_3 concentration, but the content of photosynthetic pigment, the activities of SOD,POD and CAT, the content of soluble protein, the content of soluble sugar, the content of cadmium and the accumulation of cadmium were increased first and then decreased. When the concentration of GA_3 was 10 mg L ~ (-1), the accumulation of cadmium in the aboveground part and the whole plant reached the maximum value (244.86348.97 渭 g plant~ (-1), which was 31.20% (P0.05) and 25.51% (P0.05) higher than that of the control, respectively. Therefore, 10 mg L ~ (-1) GA_3 was the best method to improve the efficiency of remediation of cadmium contaminated soil, which could be used as a strengthening measure for phytoremediation.
【作者單位】： 四川農(nóng)業(yè)大學(xué)果蔬研究所;四川農(nóng)業(yè)大學(xué)園藝學(xué)院;
【基金】：教育部博士學(xué)科點基金項目(20125103120006) 四川省教育廳科研項目重點項目(15ZA0011)資助
【分類號】：X173;X53
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本文編號：2251571