自然条件下培养的海洋浮游植物分离株对多氯联苯的响应。
Response to polychlorinated biphenyls of marine phytoplankton isolates cultured under natural conditions.
作者信息
Powers C D, Rowland R G, O'Connors H B, Wurster C F
出版信息
Appl Environ Microbiol. 1977 Dec;34(6):760-4. doi: 10.1128/aem.34.6.760-764.1977.
Abstract
Polychlorinated biphenyls (PCB) at a concentration of 10 mug/liter substantially but temporarily suppressed the growth rate and photosynthesis of two species of Thalassiosira recently isolated from Long Island Sound and grown in dialysis membrane bags suspended in the tidal channel of an estuarine marsh. Inhibition of carbon fixation was apparently due to reduced levels of chlorophyll a per PCB-treated cell, but no significant loss of function per unit of existing chlorophyll a was observed. Cell concentrations in all size classes (3.2- to 18.6-mum-equivalent spherical diameters) were markedly lower in PCB-treated cultures, with toal biomass equaling only 30% of that in control cultures throughout the experiment.
摘要
浓度为10微克/升的多氯联苯（PCB）显著但暂时抑制了最近从长岛海峡分离出来并在悬浮于河口沼泽潮汐通道中的透析膜袋中培养的两种海链藻的生长速率和光合作用。对碳固定的抑制显然是由于经PCB处理的细胞中叶绿素a含量降低，但未观察到每单位现有叶绿素a的功能有显著损失。在经PCB处理的培养物中，所有大小类别的细胞浓度（等效球形直径为3.2至18.6微米）均显著较低，在整个实验过程中，总生物量仅为对照培养物的30%。
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