A root-bag experiment was conducted to study the effects of insoluble Zn, Cd, and ethylenediaminetetraacetic acid （EDTA） on the plant growth, activities of antioxidant enzymes, proline, glutathione （GSH）, water-so...A root-bag experiment was conducted to study the effects of insoluble Zn, Cd, and ethylenediaminetetraacetic acid （EDTA） on the plant growth, activities of antioxidant enzymes, proline, glutathione （GSH）, water-soluble proteins and malondialdehyde （MDA） of Vetiveria zizanioides. The V. zizanioides uptake capacity of Zn and Cd also determined. The results showed that plant growth of V. zizanioides was inhibited by Zn and Cd. The shoot dry weight （SDW） and root dry weight （RDW） decrease by 14.2%, 14.1%, 17.0% and 17.3%, 32.5%, 35.7%, respectively, compared to the control without EDTA addition. After adding EDTA, shoot and root dry weight decreased over 10% and 15%, respectively. The toxicity from insoluble Zn and Cd in soil on SDW and RDW of V. zizanioides was in order： Zn＋Cd 〉 Cd 〉 Zn. The activities of superoxide dismutase （SOD）, peroxidase （POD） and catalase （CAT）, and contents of MDA and proline increased significantly, while the contents of GSH and water-soluble proteins decreased markedly with increasing Zn and Cd toxicity. With EDTA, shoot and root Zn concentrations increased in the Zn treatment by 7.3% and 37.4%, and Cd concentrations in the combined Zn and Cd treatment increased by 18.6% and 391.9% compared to the treatment without EDTA. However, Zn and Cd concentrations in shoot and roots decreased in the Cd treatment compared to the plants grown in absence of EDTA, with exception of root Cd concentration in the presence of EDTA.展开更多
目的明确7例血红蛋白电泳检出的异常条带产生的基因分子基础,探讨基因型与血液学表型的关系。方法用血常规指标和血红蛋白电泳进行表型分析,采用PCR-反向点杂交法检测α地贫和β地贫,应用PCR产物测序技术对α、β基因全长进行测序,检测...目的明确7例血红蛋白电泳检出的异常条带产生的基因分子基础,探讨基因型与血液学表型的关系。方法用血常规指标和血红蛋白电泳进行表型分析,采用PCR-反向点杂交法检测α地贫和β地贫,应用PCR产物测序技术对α、β基因全长进行测序,检测基因突变类型。结果 7例样本中检出4种异常血红蛋白突变型:1例中国首次发现的Hb San Bruno(HBB:c.120G>C)、2例Hb New York(HBB:c.341T>A)、2例Hb J-Bangkok(HBB:c.170G>A)、2例Hb G-Coushatta(HBB:c.68A>C),血常规参数均无明显异常。结论云南存在多种异常血红蛋白突变型,多数单纯异常血红蛋白罕见突变都不产生临床表型,但是云南作为地中海贫血的高发地区,异常血红蛋白病合并地中海贫血的临床意义和危害性有待于进一步研究。展开更多
基金supported by the National Natural Sci-ence Foundation of China (No. 20477032).
文摘A root-bag experiment was conducted to study the effects of insoluble Zn, Cd, and ethylenediaminetetraacetic acid （EDTA） on the plant growth, activities of antioxidant enzymes, proline, glutathione （GSH）, water-soluble proteins and malondialdehyde （MDA） of Vetiveria zizanioides. The V. zizanioides uptake capacity of Zn and Cd also determined. The results showed that plant growth of V. zizanioides was inhibited by Zn and Cd. The shoot dry weight （SDW） and root dry weight （RDW） decrease by 14.2%, 14.1%, 17.0% and 17.3%, 32.5%, 35.7%, respectively, compared to the control without EDTA addition. After adding EDTA, shoot and root dry weight decreased over 10% and 15%, respectively. The toxicity from insoluble Zn and Cd in soil on SDW and RDW of V. zizanioides was in order： Zn＋Cd 〉 Cd 〉 Zn. The activities of superoxide dismutase （SOD）, peroxidase （POD） and catalase （CAT）, and contents of MDA and proline increased significantly, while the contents of GSH and water-soluble proteins decreased markedly with increasing Zn and Cd toxicity. With EDTA, shoot and root Zn concentrations increased in the Zn treatment by 7.3% and 37.4%, and Cd concentrations in the combined Zn and Cd treatment increased by 18.6% and 391.9% compared to the treatment without EDTA. However, Zn and Cd concentrations in shoot and roots decreased in the Cd treatment compared to the plants grown in absence of EDTA, with exception of root Cd concentration in the presence of EDTA.
文摘目的明确7例血红蛋白电泳检出的异常条带产生的基因分子基础,探讨基因型与血液学表型的关系。方法用血常规指标和血红蛋白电泳进行表型分析,采用PCR-反向点杂交法检测α地贫和β地贫,应用PCR产物测序技术对α、β基因全长进行测序,检测基因突变类型。结果 7例样本中检出4种异常血红蛋白突变型:1例中国首次发现的Hb San Bruno(HBB:c.120G>C)、2例Hb New York(HBB:c.341T>A)、2例Hb J-Bangkok(HBB:c.170G>A)、2例Hb G-Coushatta(HBB:c.68A>C),血常规参数均无明显异常。结论云南存在多种异常血红蛋白突变型,多数单纯异常血红蛋白罕见突变都不产生临床表型,但是云南作为地中海贫血的高发地区,异常血红蛋白病合并地中海贫血的临床意义和危害性有待于进一步研究。
