A flow-through system for exposure of seagrass to pollutants
A flow-through system for exposure of seagrass to pollutants
复制标题
用于使海草暴露于污染物的流通系统
DOI：
10.1016/0141-1136(82)90047-2
复制
发表时间：
1982
影响因子：
3.3
通讯作者：
D. A. Lawrence
中科院分区：
文献类型：
--
作者：
G. Walsh;D. Hansen;D. A. Lawrence
描述了一种用于将海草暴露于污染物的流通系统。将溶解有阿特拉津或五氯苯酚（PCP）的海水泵入一个密封的2升体积的玻璃暴露容器中，容器中装有海葵的整株植物或叶子。在暴露40和88 h后测定化合物对叶片放氧和吸收的影响。放氧率被抑制强烈40小时后，由1 ppm的阿特拉津或五氯酚。氧摄取率略有抑制阿特拉津，但强烈抑制五氯酚。1 ppm的阿特拉津或五氯苯酚和0.5 ppm的阿特拉津会将光合/呼吸比率抑制到1以下。暴露40小时后，基于氧释放抑制的EC 50值为：阿特拉津，0·32 ppm PCP，0·74 ppm。这些数据表明，叶子可能会从有毒物质的存在中恢复或适应。
A flow-through system for exposure of seagrass to pollutants is described. Sea water with dissolved atrazine or PCP (pentachlorophenol) was pumped through a sealed 2-litre volume glass exposure vessel that contained either whole plants or leaves ofThalassia testudinum. Effects of the compounds on oxygen evolution and uptake by leaves were measured after exposure for 40 and 88 h. Rate of oxygen evolution was depressed strongly after 40 h by 1 ppm of atrazine or PCP. The rate of oxygen uptake was slightly depressed by atrazine but strongly depressed by PCP. Photosynthesis/respiration ratios were depressed to less than one by 1 ppm of atrazine or PCP and by 0·5 ppm atrazine. EC50values based upon depression of oxygen evolution after 40 hours exposure were: atrazine, 0·32 ppm PCP, 0·74 ppm. The data suggest that leaves may recover from, or adapt to, the presence of either toxicant.