【摘要】 对6个生态类型的22个黄瓜品种(系)的种子在15℃低温下相对发芽力、2.5℃低温处理后胚根伸长速率和三叶一心期的相对电解质渗透率共4项指标分别进行了测定,并采用隶属函数法对22个品种(系)的耐冷性进行了综合评价。结果表明,8个华北型黄瓜品种(系)中有2个强耐冷性品系和1个耐冷品种,4个华南型黄瓜均属于不耐冷或冷敏感类型,美国露地型黄瓜、欧洲温室型和露地型黄瓜共9个品种(系)包括了耐冷、中等耐冷和不耐冷等不同类型;日本型黄瓜日节成表现为冷敏感类型。更多还原

【Abstract】 The cold tolerance of 22 cucumber(Cucumis sativus L.)cultivars belonging to 6 different ecotypes was evaluated and the relative germination ratio of seeds under 15 ℃,radical growth rate under 2.5 ℃ treatment and relative electron leakage ratio at seedling stage of each cultivar were tested.The results indicated that two out of 8 North China cucumber cultivars showed strong tolerance to cold stress and 1 was tolerant to cold stress.4 South China cucumber cultivars were sensitive or low tolerant to cold stress.Nine cucumber cultivars belonging to American field type,European greenhouse and field types were of different eco-types,showing tolerance,mid-tolerance and no tolerance to cold stress.Only 1 Japanese cultivar was sensitive to cold stress.更多还原