农业环境科学学报2017，Vol.36Issue(9)：1719-1725,7.DOI:10.11654/jaes.2017-0570
不同烃链长度咪唑类离子液体对玉米幼苗生长的影响
Effects of imidazolium- based ionic liquids with different hydrocarbon chain Length on growth of maize seedlings
摘要
Abstract
Ionic liquids(ILs)are considered as ideal solvents in various chemical processes including organic synthesis, catalytic reactions, and separation engineering. However, the hazardous nature and poor biodegradability property of many ILs increase the risk of becoming po-tential environmental pollutants. Studies of the toxicity of ILs on crop growth could help assess the potential risks of ILs to field ecosystems. Maize has the largest planting area in China. Herein, the effects of three imidazolium- based ionic liquids([C4mim]Cl, [C6mim]Cl, and [C8mim]Cl)on the growth of maize seedlings, as well as some physiological and biochemical indexes, were analyzed. The results suggested that the three ionic liquids had significant inhibitory effects on the dry weight accumulation of maize seedling roots and shoots. According to the logistic regression equation, EC50 of ILs for inhibiting maize showed a tendency toward an inhibitory effect:[C4mim]Cl<[C6mim]Cl<[C8mim]Cl. In addition, shoots were inhibited more than roots. Antioxidant enzymes play central roles in plant defense against reactive oxy-gen species(ROS). The activities of antioxidant enzymes(SOD, POD, CAT, and APX)in maize roots and shoots were analyzed. Generally, the specific activity of the four antioxidant enzymes declined with an increase in IL concentration when exposed to the three ionic liquids. The contents of malondialdehyde(MDA)were significantly increased. The results indicated that oxidative stress may explain the toxic effects of imidazolium-based ILs.关键词
咪唑类离子液体/烃链长度/玉米/抗氧化酶Key words
imidazolium-based ionic liquids/hydrocarbon chain length/maize/antioxidant enzyme分类
资源环境引用本文复制引用
杨苗,贺俊亚,孙雨舟,韩兆雪,陈晓红,李亚君,温晓霞..不同烃链长度咪唑类离子液体对玉米幼苗生长的影响[J].农业环境科学学报,2017,36(9):1719-1725,7.基金项目
国家自然科学基金青年科学基金项目(31500439,31401303) The Young Scientists Fund of the National Natural Science Foundation of China(31500439,31401303) （31500439,31401303）
