【摘要】 使用透射电镜研究了在半抑制浓度的Ｃｕ、Ｚｎ、Ｓｅ、Ｃｄ 无机离子的毒性作用下， 扁藻细胞超微结构的变化。证明不同离子及不同离子浓度对扁藻的毒性效应不同。从细胞器的变化来看， 扁藻的叶绿体和细胞核对上述４种离子都较为敏感。其中Ｃｄ 离子对叶绿体和细胞核的毒性效应表现最为明显； 而Ｃｕ 离子对上述两种细胞器的毒性作用相对较弱； Ｓｅ 离子对叶绿体、Ｚｎ 离子对细胞核的破坏作用相对较小，Ｓｅ 离子对细胞核、Ｚｎ 离子对叶绿体的破坏作用较大。Ｃｕ、Ｃｄ、Ｓｅ 离子均破坏了扁藻的蛋白核， Ｚｎ 离子使蛋白核中央髓体电子密度减小。各种细胞器对上述４ 种离子均有不同程度的反应， 但以叶绿体和细胞核超微结构变化最明显。更多还原

【Abstract】 This paper reported the change of ultrastructure of the Platymonas helgolandica Kylin var.Tsintaoensis Tseng et T.J.Chang cell effected by hemiinhibition concentration of Cu,Zn,Se,Cd ion.The results showed that the toxic effect were different with different ion types and concentration.The all organelle especially chloroplast and nucleus were sensitive to these ions,among them cadium was the most effective,copper ion was the second .Selenium ion to chloroplast,zinc to nucleus had small toxici effect;selenium to nucleus and zinc to chloroplast had more affect.The Cu,Cd and Se ion distroyed protein nucleus of this algae.更多还原