生物学杂志

• 研究报告 • 上一篇    下一篇

UV-B辐射对孔石莼孢子生长发育的影响

  

  1. 1. 大连海洋大学 海洋科技与环境学院, 大连 116023;2. 辽宁省高校近岸海洋环境科学与技术重点实验室, 大连 116023
  • 出版日期:2017-04-18 发布日期:2017-04-18
  • 通讯作者: 蔡恒江,副教授,研究方向为海洋生态学,E-mail:caihj@dlou.edu.cn
  • 作者简介:张智华,硕士研究生,研究方向为海洋生态学,E-mail: 810918550@qq.com
  • 基金资助:
    国家自然科学基金(41306104);大连海洋大学校列项目(2012HYDX11);红海滩生态修复项目(PHLXZ-2017013-002)

Effects of UV-B radiation on the growth of Ulva pertusa Kjellman spores

  1. 1. College of Marine Technology and Environment; 2. Key Laboratory of Nearshore Marine Environmental Research, Dalian Ocean University, Dalian 116023, China
  • Online:2017-04-18 Published:2017-04-18

摘要: 运用实验生态学的方法,研究了UV-B辐射对孔石莼孢子生长发育的影响,结果表明:孔石莼孢子发育早期外形主要呈现棒状和蝌蚪状,其中棒状占90.68%±2.50%。UV-B辐射对孔石莼孢子生长发育有明显的抑制作用,而且随着辐射剂量的增加,抑制作用愈加明显。在30 d时,受到不同剂量UV-B辐射的孔石莼幼苗均出现了死亡,死亡率随着UV-B辐射剂量的增加而升高。UV-B辐射会使孔石莼幼苗叶绿素a含量明显下降,而丙二醛含量会有不同程度的升高,因此细胞分裂受阻,叶绿素和细胞膜系统受到破坏是孢子生长发育受到抑制和幼苗死亡的原因之一。

关键词: UV-B辐射, 孔石莼, 孢子, 生长发育

Abstract: The effects of UV-B radiation on the growth of Ulva pertusa Kjellman spores were studied by experimental ecological methods. The results showed that the growth morphology of Ulva pertusa Kjellman spores was mainly rod shape and tadpole shape. The percentage of rod shape was 90.68%±2.50%. UV-B radiation could inhibit the growth of Ulva pertusa Kjellman spores, and the growth inhibition was more significant with the increased doses of UV-B radiation treatment. On the day 30, Ulva pertusa Kjellman seedling had emerged death under UV-B radiation, and the death rate was increased with the increased doses of UV-B radiation treatment. The chlorophyll a contents of Ulva pertusa Kjellman seedling were significantly decreased, while MDA contents were increased by UV-B radiation. Therefore, the reasons of Ulva pertusa Kjellman seedling growth inhibition and death were cell division, chlorophyll and cell membrane system damage.

Key words: UV-B radiation, Ulva pertusa Kjellman, spores, growth