摘要
采用急性毒性试验方法,研究了环丙沙星与Cu复合污染对3种作物(玉米、萝卜和小白菜)种子发芽、根伸长及芽伸长的影响。结果表明,在环丙沙星与Cu复合作用下,3种作物根伸长抑制率和芽伸长抑制率与药物浓度显著相关(P<0.05);在不同Cu处理浓度下,3种作物根伸长抑制率和芽伸长抑制率均随环丙沙星浓度的增大而增大。低Cu浓度(100mg·kg-1)下,环丙沙星与Cu复合污染对玉米根伸长和芽伸长的联合作用表现为拮抗作用,对萝卜根伸长和芽伸长表现为协同作用,对小白菜的根伸长表现为拮抗作用,而对小白菜的芽伸长表现为协同作用;在高浓度Cu(400mg·kg-1)胁迫下,二者复合污染对玉米的根伸长和芽伸长均起一定协同作用,而对萝卜和小白菜的根伸长起拮抗作用,芽伸长起协同作用。
Three vegetables,corn,radish and Chinese cabbage,were chosen to study on the acute toxic effects of ciprofloxacin（CPFX）-Cu pollutants on their germination percentage,root elongation and shoot elongation.The results showed that the inhibitory rates of germination percentage,root elongation and shoot elongation of the three vegetables had significant correlations to CPFX-Cu concentrations（P0.05）.In three different Cu concentrations,the inhibitory of root elongation and shoot elongation of the three vegetables increased along with the CPFX concentration.With increasing concentration of CPFX,differences among three Cu concentration on the inhibitory rate of root（shoot） elongation of corn and radish were decreased.In the joint effects of CPFX and Cu,the interactive effects of the two pollutants on root and shoot elongation of the three vegetables were very complicated.When Cu concentration was low（100 mg·kg-1）,CPFX-Cu showed antagonistic effect on corn＇s root elongation and shoot elongation,and synergistic effect on radish＇s.Furthermore,they showed antagonistic effect on root elongation of Chinese cabbage and synergistic effect on shoot elongation.When Cu concentration was high（400 mg·kg-1）,CPFX-Cu showed some synergistic effect on root elongation and shoot elongation of corn.On the other hand,they showed antagonistic effect on root elongation of radish and Chinese cabbage,and synergistic effect on shoot elongation.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2013年第1期15-20,共6页
Journal of Agro-Environment Science
基金
国家自然科学基金"不同植物根-土界面磺胺类药物环境行为及生物有效性"项目(21107023)
河南省基础与前沿项目(112300413218)
关键词
环丙沙星
CU
复合污染
芽伸长
根伸长
抑制率
CPFX
Cu
joint toxicity
shoot elongation
root elongation
inhibitory rate
作者简介
作者简介：李通（1987-），男，河南驻马店人，在读硕士，研究方向为土壤生物修复。E—mail：yitian30821@163．com.
