Phragmites australis and Quercus robur leaf extracts affect antioxidative system and photosynthesis of Ceratophyllum demersum

被引:11
作者
Kamara, Sheku [1 ]
Pflugmacher, Stephan [1 ]
机构
[1] Leibniz Inst Freshwater Ecol & Inland Fisheries, D-12587 Berlin, Germany
关键词
Ceratophyllum demersum; dissolved organic carbon; antioxidative enzymes; physiological stress; lipid peroxidation; glutathione S-transferase; glutathione reductase; peroxidase; Phragmites australis; Quercus robur;
D O I
10.1016/j.ecoenv.2006.07.004
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
During senescence, leaves are deposited on aquatic bodies and decay under water releasing chemical substances that might exert physiological stress to aquatic organisms. Leaf litter alone contributes 30% of the total dissolved organic carbon (DOC) in streams. We investigated the impact of leaves extract from Phragmites australis and Quercits robur on the antioxidative system and photosynthetic rate of the aquatic macrophyte Ceratophyllum demersum exposed for 24h. Rate of photosynthetic oxygen release and antioxidant enzyme activity (glutathione S-transferases, glutathione reductases and peroxidases) as well as lipid peroxiclation in C demersum were measured. Significant (P < 0.01) elevations of antioxidative enzyme activity in C deiversum which tends to plateau at high DOC concentrations were observed. There was no detectable effect on lipid peroxidation. A significant dose-dependent reduction in photosynthetic oxygen production was measured. (c) 2006 Elsevier Inc. All rights reserved.
引用
收藏
页码:240 / 246
页数:7
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