Oxidative stress and defence mechanisms of the freshwater cladoceran Daphnia longispina exposed to UV radiation

被引：57

作者：

Vega, MP ^{[1
]}

Pizarro, RA ^{[1
]}

机构：

[1] Comis Nacl Energia Atom, Dept Radiobiol, RA-1429 Buenos Aires, DF, Argentina

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY | 2000年 / 54卷 / 2-3期

关键词：

UV-A; UV-B; Daphnia; plankton; oxidative stress; antioxidant enzymes;

D O I：

10.1016/S1011-1344(00)00005-1

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The aim of the present study is to evaluate the occurrence of oxidative stress in the cladoceran Daphnia longispina exposed to UV-A and UV-B radiation. The activity of antioxidant enzymes and lipid peroxidation markers is investigated and the protective action of ascorbic acid determined. Results show differences in the lethality radioinduced by UV-A and W-B. Both UV-A and UV-B exposure cause an important increase in malonaldehyde (MDA) concentration and catalase activity. Ascorbic acid addition reduces the MDA concentration, indicating that the oxidative stress caused by either W-A or UV-B radiation can be controlled by antioxidants. The increase of the antioxidant enzymes may be a response mechanism to oxidative stress. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：121 / 125

页数：5

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