不同品种苋菜对铅抗性的研究

不同品种苋菜对铅抗性的研究 Resistance Study of Pb on Six Species amaranth 吴晓 WU Xiao 1 2 first-author 熊治廷 XIONG Zhi-ting 1 2 武汉大学资源与环境科学学院 武汉大学资源与环境科学学院 College of Resources and Environmental Sciences,Wuhan University College of Resources and Environmental Sciences,Wuhan University 武汉大学资源与环境科学学院,湖北,武汉,430079 武汉大学资源与环境科学学院,湖北,武汉,430079 通过对6种苋菜在水培处理下,对不同浓度Pb2+抗性大小的比较研究,结果表明,Pb2+在低浓度（≤5mg/L）时,能促进苋菜的正常生长;但随着Pb2+浓度的增加,其促进作用变为抑制作用;高浓度（≥12 mg/L）时,Pb2+严重阻碍苋菜的生理活动,甚至出现死亡.总的来说,苋菜对铅的抗性较强.因此,在重金属污染严重的土壤上应禁止种植此抗性指数高的蔬菜品种,以免给人类健康造成潜在危害,而其非可食部分可以考虑作为去除重金属的一种途径. Resistance of six amaranth in nutrient solution medium was studied when they were exposed to different concentrations of Pb.The results that low concentration（≤5 mg/L） of Pb could promote amaranth growth was also found.However,with the increse of concentration of Pb in nutrient solution,the promotion becomes into inhibition.High concentration of Pb（≥12 mg/L） greatly restrains the growth of amarant,and even makes them die.In a word,the amaranth has a high resistance ability of Pb.As a result,the high resistance index vegetables should not be planted in high contaminated soil in order to avoid health risk,but some parts of them can be considered to be a method to remove heavy metals. 铅 苋菜 抗性指数 lead amaranth resistance index X173 国家自然科学基金资助项目（20477032） 2005-01-01 2021-04-01 S2