聚苯乙烯微塑料及噻虫胺胁迫对玉米种子萌发影响  

Effect of polystyrene microplastic and clothianidin stress on the seed germination of maize

作　　者：张铮钰 周杨 包菲菲 张红艳[1] ZHANG Zhengyu;ZHOU Yang;BAO Feifei;ZHANG Hongyan(College of Science,China Agricultural University,Beijing 100193,China)

机构地区：[1]中国农业大学理学院,北京100193

出　　处：《农药学学报》2024年第1期179-188,共10页Chinese Journal of Pesticide Science

摘　　要：以玉米种子为研究对象,探究了聚苯乙烯微塑料(PS-MPs)和噻虫胺单一及联合暴露对玉米种子萌发特性的影响。结果表明:分别用粒径0.5、5和50μm及质量浓度分别为10和100 mg/L的PS-MPs单一处理,对玉米种子的萌发(萌发率、发芽势、发芽指数、活力指数、根长及芽长)均存在显著抑制作用,且PS-MPs的粒径和质量浓度的变化对种子萌发状况影响较小;使用噻虫胺单一处理,低浓度(10 mg/L)时对玉米种子萌发无较大影响,高浓度(100和200 mg/L)时则存在显著抑制作用。相较于单一噻虫胺处理,质量浓度100 mg/L、粒径为50μm的PS-MP与200 mg/L噻虫胺联合暴露处理可使玉米种子中噻虫胺的含量下降,从而缓解了高浓度噻虫胺对玉米种子萌发的抑制作用。本研究表明,高浓度噻虫胺和单一PS-MPs暴露对玉米种子萌发有抑制作用,而在噻虫胺与PS-MPs联合暴露时,PS-MPs可缓解高浓度噻虫胺对种子萌发的抑制作用。In this paper,the effect of single and combined exposure of polystyrene microplastics(PS-MPs)and clothianidin on the germination characteristics of maize seeds was investigated.The results showed that the germination of maize seeds(germination rate,germination energy,germination index,vigor index,root length,and shoot length)was significantly inhibited by 10 mg/L and 100 mg/L PS-MPs with three particle sizes of 0.5,5,and 50μm in the single treatment,and the variation in particle size and concentration of PS-MPs had less effect on the germination status of maize seeds.In the single clothianidin treatment,the low concentration(10 mg/L)of clothianidin had no significant effect on the germination of maize seeds,while the high concentration(100 mg/L and 200 mg/L)of clothianidin had a significant inhibitory effect on the germination of maize seeds.Compared with single clothianidin treatment,the combined exposure group with the 100 mg/L PS-MPs with a particle size of 50μm and 200 mg/L clothianidin decreased the content of clothianidin in maize seeds,alleviating the inhibitory effect of high concentrations of clothianidin on the germination of maize seeds.High concentrations of clothianidin and single PS-MPs exposure inhibited maize seed germination,whereas PS-MPs alleviated the inhibitory effects of high concentrations of clothianidin on seed germination in the combined exposure.

关 键 词：聚苯乙烯微塑料 噻虫胺 玉米 种子萌发 

分 类 号：S513[农业科学—作物学] TQ450.263[化学工程—农药化工]