摘要
采用盆栽试验研究了土壤外源四环素与金霉素(TC-CTC)、四环素与磺胺嘧啶(TC-SD)二元复合污染对小白菜幼苗生长发育的毒理效应。结果表明,0.5 mg·kg^(-1)抗生素复合污染胁迫促进了小白菜芽长和根长的生长,但随着抗生素浓度的增加,小白菜芽长及根长生长逐渐受到抑制,根长受抑制程度高于芽长,25 mg·kg^(-1)TC-CTC处理对根长的抑制率达72.7%。与抗生素单一污染相比,二元复合污染胁迫使小白菜体内可溶性蛋白含量显著降低,暴露30 d时25 mg·kg^(-1)TC-CTC处理对可溶性蛋白抑制程度最大,抑制率为67.1%,同时超氧化物歧化酶、过氧化物酶和过氧化氢酶活性受到的抑制作用更显著,呈现协同作用。
We investigated the combined toxicological effects of tetracycline + chlortetracycline( TC-CTC) and tetracycline + sulfadiazine( TC-SD) on the growth and development of Chinese white cabbage seedlings under pot-culture. The results showed that the growth of shoots and roots of cabbage were promoted by the TC-CTC and TC-SD at a concentration of 0.5 mg·kg^-1. With increasing concentration,the growth of shoots and roots were gradually inhibited. The inhibitive effects on root length were higher than that on shoot length. The inhibition rate of root length was up to 72.7% by TC-CTC at 25 mg·kg^-1. Compared to single pollutant,TC-CTC and TC-SD significantly decreased the content of soluble protein in cabbage. The maximum inhibition rate of67.1% was presented in the treatment of TC-CTC at 25 mg·kg^-1after 30 days. Moreover,the activities of superoxide dismutase,peroxidase and catalase were inhibited more under such treatment,highlighting a synergistic effect.
作者
宫晓双
安婧
张立娜
魏树和
GONG Xiao-shuang;AN Jing;ZHANG Li-na;WEI Shu-he(Institute of Applied Ecology,Chinese Academy of Sciences, Shenyang 110016,China;College of Resource and Environment,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2019年第2期541-547,共7页
Chinese Journal of Ecology
基金
国家自然科学基金项目(31370523)资助
关键词
抗生素
复合污染
小白菜
生态毒性
抗氧化防御系统
antibiotics
combined pollution
Chinese white cabbage
ecotoxicology
antioxidant defense system.
