农业环境科学学报2016，Vol.35Issue(10)：1895-1902,8.DOI:10.11654/jaes.2016-0301
阿特拉津胁迫对菖蒲的生理毒性效应
Phytotoxicity of atrazine to Acorus calamus L.
摘要
Abstract
Long term applications of atrazine have resulted in water and soil contamination. In this study, a hydroponic experiment was de-signed to assess the toxicity of atrazine to emergent macrophyte Acorus calamus L., by measuring chlorophyll content, chlorophyll a/b ratio, maximal photochemical efficiency(Fv/Fm), malondialdehyde(MDA)content, peroxidase(POD), and superoxide dismutase(SOD)activities under unsterile and sterile conditions. In unsterile treatment, plant chlorophyll content in leaves reduced with increases in atrazine concen-trations and cultivation time. Chlorophyll a/b ratio had no significant difference compared with that of the control during the entire cultiva-tion period. MDA content increased initially and then decreased with the prolongation of cultivate time. After 5-week exposure, MDA con-tent had no significant differences between atrazine treatment groups at concentrations less than 2 mg·L-1, as compared with control. Fv/Fm ratio reduced with increasing atrazine concentrations, but no significant difference was found between 0.5 mg·L-1 treatment and the control. It, however, recovered to the control’s level after the 5th week exposure. Under sterile condition, chlorophyll content and Fv/Fm decreased significantly compared with those in unsterile condition within 1-week exposure. Such significant difference in Fv/Fm still existed at atrazine level above 1 mg·L-1 under 4- and 5-week exposures. During the whole experimental period, Fv/Fm ratio was significantly lower in atrazine treatments than in the control when atrazine concentration exceeded 2 mg·L-1 under sterile condition. Acorus calamus L. was highly tolerant to atrazine stress and microorganism in the hydrophic system, to a certain extent, can alleviate the phytotoxicity of atrazine stress.关键词
阿特拉津/菖蒲/生理特性/水污染/抑菌条件/耐受性Key words
atrazine/Acorus calamus L./physiological index/water pollution/sterile condition/tolerance分类
资源环境引用本文复制引用
李翠,温海峰,郑瑞伦,陈洁,马雪菊,王庆海..阿特拉津胁迫对菖蒲的生理毒性效应[J].农业环境科学学报,2016,35(10):1895-1902,8.基金项目
国家自然科学基金项目 （）
