首页 | 期刊简介 | 编委会 | 投稿要求 | 化学品管理信息动态 | 学术会议 | 专辑 | 毒理学测试技术设备 | 订购本刊 | 联系我们 | English version

喻燚, 李巧玉, 董聪聪, 张红波, 向蓉, 施军琼, 吴忠兴*. 4-壬基酚对拟柱胞藻生长、抗氧化酶和光合作用的影响及机理[J]. 生态毒理学报, 2018, 13(6): 259-267
4-壬基酚对拟柱胞藻生长、抗氧化酶和光合作用的影响及机理
Effect and Mechanism of 4-nonylphenol on the Growth, Antioxidative Enzymes and Photosynthesis of Cylindrospermopsis raciborskii
投稿时间:2017-12-13  修订日期:2018-03-19
DOI:
中文关键词:  拟柱胞藻  4-壬基酚  叶绿素a  抗氧化酶  光合作用
英文关键词:Cylindrospermopsis raciborskii  4-nonylphenol  chlorophyll a  antioxidative enzyme  photosynthesis
基金项目:中央高校基本业务费专项资金(XDJK2017B010);西南大学博士基金资助 (SWU110065)
作者单位
喻燚, 李巧玉, 董聪聪, 张红波, 向蓉, 施军琼, 吴忠兴* 西南大学三峡库区生态环境教育部重点实验室重庆市三峡库区植物生态与资源重点实验室重庆 400715 
摘要点击次数: 66
全文下载次数: 31
中文摘要:
      为探究4-壬基酚对入侵水华蓝藻拟柱胞藻的影响,对不同浓度(0.00、0.05、0.10、0.50、1.00、2.00 mg·L-1)4-壬基酚处理96 h后的拟柱胞藻叶绿素a、抗氧化酶和光合作用进行测定。结果表明,4-壬基酚对拟柱胞藻96 h半数效应浓度(96 h-EC50)为0.457 mg·L-1。高浓度处理(>0.50 mg·L-1)时,拟柱胞藻叶绿素a含量、最大光合效率(Fv/Fm)、光合效率(α)、最大相对电子传递速率(rETRmax)、半饱和光强(Ik)、RC/Cs0、ET0/RC、ΦP0、ΦE0、ψ0和Sm/t(Fm)均显著下降被显著抑制,而光合系统Ⅱ中ABS/RC、DI0/RC和TR0/RC均显著增加,同时SOD、CAT的活性随着浓度增加明显上升。而低浓度处理下(<0.10 mg·L-1),拟柱胞藻的叶绿素a含量、光合效率、最大相对电子传递速率和半饱和光强增加。这些结果表明高浓度4-壬基酚处理下,拟柱胞藻的叶绿素合成受阻,光合色素减少,光合反应中心结构受损,QA-大量累积,光合效率下降,抑制藻细胞的光合作用,导致了拟柱胞藻生长受到阻碍,而低浓度壬基酚处理下,则可能表现出低剂量毒物兴奋效应。
  
AuthorAffiliation
Yu Yi, Li Qiaoyu, Dong Congcong, Zhang Hongbo, Xiang Rong, Shi Junqiong, Wu Zhongxing*Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education) , Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, Southwest University, Chongqing 400715, China
英文摘要:
      To explore the effect of 4-nonylphenol on the planktonic cyanobacterium Cylindrospermopsis raciborskii, chlorophyll a, antioxidative enzymes activities and photosynthetic characteristic parameters were investigated after 96 h treatments of 0.00, 0.05, 0.10, 0.50, 1.00 and 2.00 mg·L-1 4-nonylphenol. The results showed that the 96 h-EC50 values (effective concentration inducing 50% of growth inhibition after 96 h) of 4-nonylphenol in C. raciborskii was 0.457 mg·L-1. Chlorophyll a content, the maximum photochemical efficiency of PSⅡ in the dark (Fv/Fm), photosynthetic efficiency (α), the maximum relative electron transfer rate (rETRmax) and saturating light levels (Ik), RC/Cs0, ET0/RC, ΦP0, ΦE0, ψ0 and Sm/t(Fm) were significantly suppressed (P<0.05), while a significant increase was found in ABS/RC, DI0/RC and TR0/RC when C. raciborskii was treated at the high concentrations (> 0.50 mg·L-1). In addition, the activities of SOD and CAT were significantly increased as the 4-nonylphenol concentration increased. However, chl a, α, rETRmax and Ik showed significant increases when C. raciborskii was exposed to low concentrations of 4-nonylphenol (< 0.10 mg·L-1). Therefore, these results indicated that the growth of C. raciborskii inhibited by high concentrations of 4-nonylphenol may be related to the blockage of chlorophyll synthesis, reduce of photosynthetic pigment, damage of PSⅡ reaction center structure, large accumulation of QA- ande decrease of photosynthetic efficiency. Cylindrospermopsis raciborskii might show a “hormesis” at the low concentrations of 4-nonylphenol.
查看全文  查看/发表评论  下载PDF阅读器
关闭

您是第5379934位访问者   京ICP备 09058833 号

主办单位:中国科学院生态环境研究中心     单位地址:北京市海淀区双清路18号

 服务热线:010-62941072       传真:010-62923563       邮编:100085    Email: stdlxb@rcees.ac.cn

    本系统由北京勤云科技发展有限公司设计

0463美女美女3764美女美女ktv