热带海洋学报 ›› 2011, Vol. 30 ›› Issue (3): 94-98.doi: 10.11978/j.issn.1009-5470.2011.03.094cstr: 32234.14.j.issn.1009-5470.2011.03.094

• 海洋生物学 • 上一篇    下一篇

硒对紫球藻抗氧化酶活性及丙二醛含量的影响

王江宏,  刘艳,  桑敏,  李爱芬,  张成武   

  1. 暨南大学水生生物研究中心,  广东  广州 510632
  • 收稿日期:2010-09-30 修回日期:2010-11-30 出版日期:2011-07-18 发布日期:2011-07-20
  • 通讯作者: 李爱芬。E-mail: tiger@jnu.edu.cn
  • 作者简介:王江宏(1985─), 男, 山东省青岛市人, 硕士研究生, 主要从事藻类生物技术与应用研究。
  • 基金资助:

    国家高技术研究发展计划重点项目(2009AA064401);  珠海市科技局项目(PC20081008 )

Effect of selenium on antioxidant enzyme activity and  malondialdehyde content of Porphyridium sp.

WANG Jiang-hong, LIU Yan, SANG Min, LI Ai-fen, ZHANG Cheng-wu   

  1. Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
  • Received:2010-09-30 Revised:2010-11-30 Online:2011-07-18 Published:2011-07-20

摘要:

利用添加 0.5mg·L−1硒的人工海水(ASW)培养基培养紫球藻 Porphyridium sp. UTEX 637,  并采用试剂盒、氯
化硝基四氮唑蓝(NBT)光化学还原反应法、紫外分光光度法、硫代巴比妥酸(TBA)分析法测定谷胱甘肽过氧化物酶
(GSH-Px)、超氧化物歧化酶(SOD)和过氧化氢酶(CAT)的活性及丙二醛(MDA)的含量,  着重探讨硒对紫球藻抗氧化
酶活性及丙二醛含量的影响。结果表明,  硒明显促进紫球藻细胞的 GSH-Px 活性(p<0.05)。加硒处理组和未加硒对
照组紫球藻的 GSH-Px 活性均在第 15 天达到最高;  加硒组紫球藻的最大酶活性达到 4.31 个酶活力单位(U),  为对
照组的 1.31 倍。SOD  和 CAT 的活性分别在第 18 天和 15 天达到最大值,  但加硒组与对照组之间差异不显著
(p>0.05),  说明 0.5mg·L−1硒对紫球藻的 SOD 和 CAT 活性影响不明显。加硒能明显降低藻细胞丙二醛的含量,  加
硒组藻细胞的丙二醛含量比对照组藻细胞的丙二醛含量降低了 15.21%。

关键词: 紫球藻, 硒,  , 抗氧化酶,  , 丙二醛

Abstract:

The effect of selenium on Porphyridium  sp. UTEX 637 major antioxidant enzyme system, including glutathione
peroxidase (GSH-Px), superoxide dismutase (SOD), catalase (CAT) activities, and malondialdehyde (MDA) content, were
investigated.  Porphyridium sp. was cultured in artificial seawater ASW medium containing 0.5mg·L−1
 selenium.  GSH-Px,
SOD, CAT activities, and MDA content were determined by kits, nitroblue tetrazolium (NBT) photoreduction, UV spectro-
photometry, and thiobarbituric acid (TBA) analysis, respectively. The results show that  selenium improved the antioxidation
activity of Porphyridium  sp. by increasing the activity of GSH-Px (p<0.05). The GSH-Px activity of Se-treated group and
control group reached the highest on the 15th day, and the GSH-Px activity of Se-treated group was heightened to 4.31U,
which was 1.31 fold higher than that of the control group. SOD and CAT activities reached the maximum on the 18th day and
15th day, respectively, but the differences between the experimental group and the control were not significant (p>0.05). The
activity of SOD and CAT was not significant at the 0.5mg·L−1
concentration of selenium. The content of MDA in Se-treated
group was 15.21% lower than that in the control group.

Key words: Porphyridium sp., selenium, antioxidant enzyme, malonaldehyde