Cr^(6+)污染对水鳖的超微结构及菱、莼菜、黑藻细胞膜的影响

The Effects of Cr^(6+)'s Pollution on the Ultrastructure of Hydrocharis dubia and Cell Membrane of H.verticillata,Brasenia schreberi,Trapa bispinosa

Cr6+污染对水鳖超微结构的影响主要表现在 :胞间连丝呈现不同程度的断裂 ;细胞核出现各种各样的变形 ;叶绿体膨胀 ,其基粒解体。细胞损伤程度与 Cr6+ 培养浓度呈正相关。Cr6+ 对水鳖、菱、莼菜和黑藻这几种水生高等植物的细胞膜影响主要表现在 :质壁发生分离 ,质壁之间有黑色颗粒存在。在做生理验证时发现处理组的膜脂过氧化产物丙二醛 (MDA)和超氧阴离子 (O 2 )均高于对照。

The effects of Cr 6+'s pollution on the ultrastructure of Hydrocharis dubia mainly showed:plasmodesmata fractured,nuclei deformed in different ways,chloroplast enlarged,granum disorganized.Relationship between the le- vel of injured cell and cultural concentration was positive.On the Hydrocharis dubia,H.verticillata,Brasenia schreberi,Trapa bispinosa was plasmolysis and black grains emerged between cell wall and cell membrane;physiological test showed:contents of MDA and O  2 were higher than that of control class.