摘要
应用同位素标记法 ,研究了对硫磷对三角褐指藻核酸和蛋白质合成动态的影响。结果表明 ,低浓度的对硫磷 (≤1 .5mg/L)对三角褐指藻的生长有刺激作用 ,而高浓度的对硫磷 (≥ 2 .0 mg/L)却严重抑制三角褐指藻的生长。低浓度对硫磷在促进生长的过程中 ,藻细胞中蛋白质、DNA、RNA3种大分子物质的合成活跃 ,其合成速度升高 ;而在高浓度对硫磷的胁迫下 ,蛋白质、DNA、RNA的合成明显地受到了抑制 。
The effect of parathion on the synthesis of protein and nucleic acid in Phaeodactylum tricornutum was studied with isotope tracing methods.The results showed that the low levels of parathion (≤1 5mg/L) could stimulate the growth of Phaeodactytum tricornutum, while high concentrations of parathion (≥2.0mg/L) could inhibited its growth.The synthesis of protein and nucleic acid was active during the process of stimulation,their synthesis rate increased.On the contrary,the synthesis of protein and nucleic acid was remarkably inhibited under the stress of high level parathion,their synthesis rate was lower than those of control.
出处
《生态学报》
CAS
CSCD
北大核心
2000年第4期598-600,共3页
Acta Ecologica Sinica
基金
PDB6-7-1资助项目
国家自然科学基金!(39870 146)资助项目
关键词
对硫磷
三角褐指藻
蛋白质
核酸
合成
海洋污染
Parathion
Phaeodactylum tricornutum
protern
nucleic acid
synthesis
