野花麦体内Pb对其生理性质的影响  

Effects of Pb on physiological features of houttuynia cordata thunb

作　　者：李娟娟[1] 梁宁刚 蔡卓[1] 蒋翠文[1] 叶丹妮[1] Li Juan-juan;Liang Ning-giang;Cai Zhuo(College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《广西农学报》2018年第1期25-29,共5页Journal of Guangxi Agriculture

基　　金：广西自然科学基金(批准号:2015GXNSFAA139239)资助;广西大学实验设备处资助项目(20140304)

摘　　要：为研究重金属对草本中药的毒害作用,本文探讨了野花麦在Pb污染下其植物可溶性蛋白、总黄酮和叶绿素等三项生理性质的变化情况。通过盆栽种植野花麦并进行Pb污染处理,经过一定时期生长后测定其可溶性蛋白、总黄酮、和叶绿素含量并进行了数据分析。实验表明,随着植株体内Pb的积累量的增加,植物的生长逐渐受到抑制,其生理特性也发生改变。其中,可溶性蛋白在植株各部位各有不同程度的下降;颈部总黄酮的变化是先升后降,而叶片与根部总黄酮的变化是不断下降;植株各部位叶绿素均为先升后降。说明野花麦体内Pb的积累会破坏或抑制可溶性蛋白、总黄酮及叶绿素的合成,从而损害植物的正常生长,表现出毒害作用。To investigate the toxic effects of heavy metal on Chinese herbal medicine, the vatiations ofphysiological features caused by Pb in houttuynia cordata thunb were studied. The experiments were car-ried out in the simulation environment of Pb contamination. Houttuynia cordata thunb was planted in pots,after a certain period of growth,the soluble protein,total flavonoids,and chlorophyll content were de-termined,and the data was subjected to statistic analysis. It was demonstrated that,with the increment of Pb in Houttuynia cordata Thunb,the growth of the plant was inhibited,and its biochemical characteristics were changed. Among the variations,soluble protein in all parts of the plant showed a downward trend all the time; the total flavonoids in leaves and roots also showed a downward trend,while the total flavonoids in stems and the chlorophyll content in leaves and stems exhibited the trend of increase first and then de-crease. This phenomena indicated that the Pb in houttuynia cordata thunb could inhibit the synthesis of soluble protein,total flavonoids,and chlorophyll,and result in the damage of plant growth. Therefore,the hazardous effect of Pb on the plant was obvious.

关 键 词：野花麦 PB 可溶性蛋白 总黄酮 叶绿素 

分 类 号：X173[环境科学与工程—环境科学]