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热带海洋学报 ›› 2013, Vol. 32 ›› Issue (4): 58-63.doi: 10.11978/j.issn.1009-5470.2013.04.009cstr: 32234.14.j.issn.1009-5470.2013.04.009

• 海洋生物学 • 上一篇    下一篇

不同浓度的铜离子对坛紫菜丝状体的生理生态影响

陈伟洲, 郭翠, 宋志民, 吴文婷, 金玉林   

  1. 汕头大学海洋生物研究所, 广东 汕头, 515063
  • 收稿日期:2011-09-08 修回日期:2011-12-14 出版日期:2013-10-20 发布日期:2013-10-30
  • 作者简介:陈伟洲(1971—), 男, 广东省澄海市人, 高级工程师, 从事大型海藻生物学与实验生态学研究, E-mail: wzchen@stu.edu.cn
  • 基金资助:
    国家海洋公益性行业科研专项(200905020)

Toxic effects of heavy metal copper on the conchocelis of Porphyra haitanensis

CHEN Wei-zhou, GUO Cui, SONG Zhi-min, WU Wen-ting, JIN Yu-lin   

  1. Marine Biology Institute, Shantou University, Shantou 515063, China
  • Received:2011-09-08 Revised:2011-12-14 Online:2013-10-20 Published:2013-10-30

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摘要： 文章通过测定急性条件下不同浓度重金属离子Cu对坛紫菜自由丝状体的生长状态、对叶绿素a生物合成影响和对贝壳丝状体的壳孢子放散的毒性效应。结果发现: 在Cu2+浓度不断升高、暴露时间不断延长过程中, 坛紫菜自由丝状体生长状态受到严重抑制, 且颜色由深红色变为浅红色、黄色、绿色、灰白色; 随着Cu2+胁迫浓度升高, 短时间内, 叶绿素a含量显著性下降。铜离子对坛紫菜自由丝状体在24、48和72h的半抑制浓度IC50的估计值为3.298、0.625、0.171mg·L-1, 其安全浓度约为0.0171mg·L-1。对于壳孢子放散而言, 表现出较好的剂量-效应关系。低浓度处理组基本对壳孢子放散量没有影响, 而高浓度处理组的壳孢子放散量明显受到Cu2+的影响, 放散量显著性下降或几乎没有壳孢子放散。

关键词: 坛紫菜, 贝壳丝状体, 自由丝状体, 铜, 壳孢子

Abstract: In this paper, we show some of our findings from measuring the growth of free conchocelis of Porphyra haitanensis, the effects on the biosynthesis of Chl a,and the release of the shell fixed conchocelis under the different concentrations of heavy metal ions Cu. The growth of free conchocelis of Porphyra haitanensiswas inhibited severely, and the color of the conchocelis became pink, yellow, green, and then white as the concentration increased and the exposure time prolonged. We also found the higher concentration of Cu2+ depressed the chlorophyll content in a short time. The influence of Cu on free conchocelis in the 24h, 48h , and 72h IC50 concentrations were: 3.298, 0.625, and 0.171 mg·L-1 (estimated value), while the safe concentration was 0.0171 mg·L-1 (estimated value). For conchospore releasing, the number of released conchospore showed a good dose-response relationship with the stress of Cu2+. Under low concentrations of Cu2+, the released conchospore number was not affected, while it was significantly inhibited at high concentration treatment.

Key words: Porphyra haitanensis, shell fixed conchocelis, free conchocelis, copper, conchospore

中图分类号: 

  • S968.43+1