摘要： 结球白菜早熟品种小杂55的叶绿素降解时间先于中晚熟材料IZ-28，前者的降解速率也大于后者，这表明前者不如后者耐贮。在整个采后衰老过程中，前者的乙烯生成率、呼吸强度和过氧化物酶活力均明显高于后者，分别约为后者的3.80倍、1.33倍和1.32倍。因此初步认为乙烯生成率、呼吸强度和过氧化物酶活力高是早熟品种不耐贮藏的部分原因。内源乙烯水平有可能作为培育新的耐藏品种和采后筛选耐藏品种的一项重要生理指标。

关键词: 结球白菜, 品种, 耐藏性, 乙烯

Abstract: The early Chinese cabbage(Hybrid No55)was found to senesce sooner than the late one(IZ-28)in terms of the beginning arid rate of chlorophill loss.Ethylene production,respiration rate arid peroxidase activity in Hybrid No.55 were markedly higher than in IZ-28 3.80-fold,1.33-fold,and 1.32-fold respectively.Those might be part of the causes for the better storability of the late variety.It is suggested that endogenous ethylene level may be used as a physiological index for breeding and selecting new varieties with high storability.

Key words: Chinese cabbage, Varieties, Storability, Ethylene