【作者】 魏珉； 马红； 于贤昌； 李滨；

【Author】 Wei Min, Ma Hong, Yu Xianchang, and Li Bin (Department of Horticulture, Shangdong Agricultural University, Taian 271018)

【机构】 山东农业大学园艺系；

【摘要】 将正常生长的厚皮甜瓜幼苗于5℃低温下处理1天、2天和3天,观察低温对幼苗生育的影响。结果表明:低温胁迫导致幼苗光合、蒸腾速率明显下降,膜渗漏性增强,叶片过氧化氢酶和根系琥珀酸脱氢酶的活性下降,从而引起幼苗生育受阻。因此育苗和抗寒锻炼过程中要防止胁迫效应。更多还原

【Abstract】 Experiments on muskmelon ( Cucumis melo ssp. rigidus) were carried out to determine the effects of cold stress on seedling growth by treating seedlings at 5℃ for different time. Results showed that cold stress obviously decreased leaf photosynthetic rate and transpiration rate, increased the membrane permeability, reduced the activities of leaf catalase and root amber acid dehydrogenase. As a result, the seedling growth was severely restrained and some morphological injury symptoms appeared. So more attention must be paid to eliminate cold depression during raising and training seedlings.更多还原