低温处理对不同耐寒性黄瓜幼苗叶片超微结构的影响

Effects of Low Temperature Treatment on the Ultrastructure of Seedling Leaf of Different Cold Resistance Cucumber

应用透射电镜观察了低温处理对黄瓜幼苗叶片超微结构的影响。结果表明,低温胁迫对耐寒性不同的黄瓜幼苗叶片超微结构的影响程度不同,低温胁迫对耐低温品系叶片超微结构的破坏较小,发生轻微质壁分离,叶绿体内淀粉粒减少,少部分线粒体形状发生改变,其他无明显差异,而低温胁迫对冷敏感品系叶片超微结构的破坏较大,发生严重质壁分离,叶绿体被膜解体,基粒片层解体,线粒体膜破坏。

Electronic transmission microscope was used to examine the mesophyll cell ultrastructure of cucumber seedling leaves during low temperature. The results showed that low temperature stress had effect in different degrees on the ultrastructure of dissimilar cold resistance cucumber seeding leaves, its destructiveness was also little on the ultrastructure of low-temperature resistant lines leaves, plasmolysis was light, starch grain of chloroplast reduced, the shape of few mitochondrion changed, the others were similar. Whereas destructiveness was serious on the uitrastructure of the low temperature sensitive lines leaves, plasmolysis was severe, capsul of chloroplast and grana lamella were disorganized, capsul of mitochondrion was destructed.