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邻苯二甲酸二丁酯污染对老鼠簕幼苗抗逆性生理特性的影响
赵秋毅1,2, 李元跃1,2, 陈融斌1,2, 潘 文3, 陈政强1,2, 徐佳佳1,2, 李容伟1,2, 高苏蕊1,2, 刘 畅1,2
1.集美大学 水产学院;2.福建省海洋渔业资源与生态环境重点实验室;3.集美大学 食品与生物工程学院
摘要:
以红树植物老鼠簕作为实验材料, 通过模拟海水实验, 研究了不同质量浓度(0、1、2、5、10、20 mg/L)的邻苯二甲酸二丁酯(DBP)污染暴露对老鼠簕幼苗叶绿素含量、比值及抗氧化酶系统(SOD,POD, CAT)等生理指标的影响。结果表明: (1)当DBP浓度为5mg/L时, DBP污染对老鼠簕幼苗叶绿素含量具有一定促进作用, 其余浓度DBP污染均会使老鼠簕幼苗叶绿素含量显著下降; DBP污染对老鼠簕幼苗叶绿素a/b比值基本无影响; (2)随着DBP浓度升高, 老鼠簕幼苗抗氧化酶活性均呈现先上升后下降的变化。说明DBP污染会导致老鼠簕幼苗叶片衰老; 低浓度DBP暴露(≤10 mg/L)可以诱导老鼠簕幼苗抗氧化酶系统活性增加, 并保持一定时间细胞内活性氧平衡, 高浓度DBP暴露(>10 mg/L)会对老鼠簕幼苗的抗氧化酶系统产生不可逆的损伤。研究结果也为红树林湿地的保护, DBP的生态风险评价及污染控制提供了科学参考。
关键词:  邻苯二甲酸二丁酯(DBP)  红树植物  老鼠簕  叶绿素  抗氧化酶
DOI:10.11759/hykx20171128001
分类号:
基金项目:福建省高校产学合作重大项目(No.2016Y4001)
Effects of dibutyl phthalate pollution on stress resistance physiological characters of the Acanthus ilicifolius L. seedlings
ZHAO Qiu-yi,LI Yuan-yue,CHEN Rong-bin,PAN Wen,CHEN Zheng-qiang,XU Jia-jia,LI Rong-wei,GAO Su-rui,LIU Chang
Abstract:
In the simulated pot experiments, the effects of different exposure of dibutyl phthalate(DBP) mass concentrations (0, 1, 2, 5, 10, 20 mg/L) on contents of chlorophyll, ratio of chlorophyll a/b, antioxidant enzymes (superoxide dismutase, peroxidase and catalase) et al were studied, taking the mangrove Acanthus ilicifolius L. seedlings as experimental materials. The results showed that the 5mg/L DBP exposure would have a positive effect on chlorophyll content of the seedlings, while others reduced remarkably. The DBP exposure has hardly effect on the ratio of chlorophyll a/b in the seedlings. The results also showed the activity of antioxidant enzymes in A. ilicifolius L. seedlings first increased then declined with the improve of DBP concentration. It is suggested that the DBP pollution could lead to leaf senescence. Antioxidant enzyme system could be induced to increase its activity with a low-concertation DBP exposure(≤10 mg/L) and maintain the metabolic balance of active oxygen in cells within a certain time, while could get irreversible damage with a high one(>10 mg/L). The conclusions of this study also provide a scientific reference for the protection of mangrove wetlands, as well as the ecological risk assessment and pollution control of DBP.
Key words:  dibutyl phthalate  mangrove  Acanthus ilicifolius L.  chlorophyll  antioxidant enzymes
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