摘要： 对四个黄瓜亲本及其杂交一代（F₁）的生理特性试验研究表明，F₁的相对电导值与双亲的相对电导值呈正相关关系。MDA含量在低温处理48h后上升，72h后下降，较耐低温亲本的F₁的MDA含量低于双亲平均值，不耐低温亲本的F₁的MDA含量高于双亲的平均值；低温处理72h后CAT酶活性下降，POD酶活性上升；POD酶同工酶分析表明，低温处理后酶带数增加，耐低温的F₁酶带增加较多。

关键词: 黄瓜, 幼苗, 低温胁迫, 相对电导值, POD同工酶

Abstract: Four cucumber parents and their two F₁ hybrids were studied on the inheritance of some characteristics under chilling stress. The results indicated that the relative electrical conduct of F₁ hybrids was positively correlative to that of their parents in the whole process of chilling.Content of MDA firstly increased after 48 hours and decreased after 72 hours of treatment.Contents of MDA in F₁ hybrids which were relatively tolerant to chilling were lower than the mean value of MDA in their Parents, but were higher in chilling-intolerant ones. After a chilling treatment of over 72 hours, the activity of CAT enzymes decreased, but the activity of POD enzymes increased. The analysis of POD isozymogram showed that the number of the enzyme bands increased after chilling treatment, and that the increase of enzyme bands in chilling-tolerant F₁ hybrids was greater.

Key words: Cucumber seedling, Chilling stress, Relative electrical conduct, POD isozymes

中图分类号: 

• S642.201