微塑料-镉复合污染对绿豆种子发芽及幼苗生长的影响  

Effect of Microplastic-Cadmium Combined Pollution on Germination and Seedling Growth of Mung Bean Seeds

作　　者：郑阳 查旭琼 周凯泰 王娟[1] 张跃进[1] Zheng Yang;Zha Xuqiong;Zhou Kaitai;Wang Juan;Zhang Yuejin(College of Biological,Chemical Science and Engineering,Jiaxing University,Jiaxing,Zhejiang 314033)

机构地区：[1]嘉兴学院生物与化学工程学院,浙江嘉兴314033

出　　处：《嘉兴学院学报》2022年第6期59-64,共6页Journal of Jiaxing University

基　　金：嘉兴市科技计划重大民生科技专项项目资助(2020AZ30002);嘉兴市产教融合“五个一批”项目(00221022)。

摘　　要：为探究微塑料与重金属的复合效应对农作物种子生长特性的影响,选取绿豆种子为实验对象,研究不同浓度的聚乙烯微塑料(PE,100、300、500、1000和1500 mg/kg)与镉离子溶液(Cd^(2+),2、5、10和50 mg/kg)的复合污染对绿豆种子发芽及幼苗生长的影响.结果表明:微塑料与镉的复合污染对绿豆种子发芽具有抑制作用,最高抑制率可达40.00%.而高浓度的微塑料与镉复合处理在一定程度上具有减弱镉对绿豆种子毒性的效应,可使绿豆种子发芽率增至93.00%,两者之间存在拮抗作用.而微塑料与镉复合污染对绿豆幼苗生长的影响整体呈现低促高抑的规律,协同促进作用可使株高的增长率达到10.89%,抑制率可达48.46%.对绿豆幼苗SOD酶和CAT酶的活性抑制率分别可达62.09%和97.83%,而对绿豆幼苗POD酶活性则为促进作用,促进效率可达75.07%.In order to explore the compound effect of microplastics and heavy metals on the growth characteristics of crop seeds,mung bean seed was selected as the experimental object to study the effect of the combined pollution of different concentrations of polyethylene microplastics(PE,100,300,500,1000 and 1500 mg/kg)and cadmium ion solution(Cd^(2+),2,5,10 and 50 mg/kg)on seed germination and seedling growth.The results showed that the combined pollution of microplastics and cadmium could inhibit the germination of mung bean seeds with the highest inhibition rate of up to 40.00%;however,the combined treatment of high concentration of microplastics and cadmium could weaken the toxicity of cadmium to mung bean seeds to a certain extent and improve their germination rate up to 93.00%,which indicated the antagonism between the two.The effect of microplastics-cadmium combined pollution on the growth of mung bean seedlings showed a rule that“low concentration would promote the growth while high concentration would inhibit”.The synergistic promoting effect could make the growth rate of plant height reach 10.89%and the inhibition rate reach 48.46%.The activity of SOD and CAT was inhibited by 62.09%and 97.83%while the activity of POD was promoted by 75.07%.

关 键 词：微塑料 镉 复合污染 绿豆 种子发芽 生长特性 

分 类 号：X51[环境科学与工程—环境工程]