多环芳烃(萘)污染对南四湖狐尾藻生理指标的影响

Effects of PAHs(naphthalene) Pollution on the Physiological Index of Myriophyllum verticillatum in Nansi Lake

通过盆栽试验研究了萘污染对南四湖狐尾藻(Myriophyllum verticillatum)生理指标的影响.结果表明,萘对狐尾藻具有某些毒害作用,且随着浓度的增加(1.2-16.1 mg/L)显示出明显的负效应,呼吸强度受到抑制,叶绿素含量降低.另外,狐尾藻的过氧化物酶(POD)活性整体上逐渐升高;狐尾藻丙二醛(MDA)含量随萘浓度增加先升高后降低.因此叶绿素含量、POD活性及MDA含量可以作为水生植物受萘污染的指标,狐尾藻可以选作萘污水处理净化的备选水生植物.

Based on the pot experiments, effects of PHAs （naphthalene） pollution on the physiological index of Myriophyllurn verticillatum in Nansi lake were studied. The results show that naphthalene pollution can damage M. verticillatum, and the growth of M. verticillatum expresses obvious negative effects as the concentration gradient of naphthalene increases （1.2 -16.1 rag/L） , inhibiting the respiration rate of hydrophyte and decreasing the con- tents of chlorophyll. Moreover the POD （peroxidase） activity of M. verticillatum decreases gradually on the whole ; the content of MDA （malondialdehyde） rises at first , then coming down with the increasing of concent ration of naphthalene. So the Chlorophyll content, POD activity and contents of MDA can be used as index of hydrophytes polluted by naphthalene. M. verticillatum can be choosed to be one of the hydrophytes to purificate the pollution of naphthalene.