丙溴磷对二种海洋微藻的GPx活性及GSH、CAR含量的影响

Effect of Profenofos on Glutathione Peroxidase and on the Contents of Glutathione and Carotinoid in Two Species of Marine Microalgae

实验以三角褐指藻和青岛大扁藻为材料 ,进行了丙溴磷农药对海洋微藻的抗氧化防御系统成份— GPx(glutatione Peroxidase)活性和 GSH(glutathione)、CAR(carotinoid)含量的影响研究 ,结果表明 ,在丙溴磷胁迫下 ,微藻的 GPx活性呈现下降趋势 ,GSH和 CAR含量也表现为下降趋势 ,并且胁迫的时间越长、胁迫的强度越大它们下降的幅度也越大。因此微藻细胞对抗氧化防御系统的能力被削弱 ,从而可能导致活性氧在体内的过量产生与积累 ,进而对藻细胞造成更大的伤害。

The effect of Profenofos on GPx activities and on the contents of GSH and CAR in Phaeodactylum tricornutum and Platymonas helgolandica were studied. The results indicate that the GPx activities of two species of microalgae declined, and the contents of glutathione and carotinoid of algal cells decreased under high concentration of Profenofos. Therefore the antioxidant defense system of marine microalgae were damaged, and the Reactive Oxygen Species (ROS) may damage the algal cells easily.