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摘 要：以18个番茄品种为试材，置于冷害条件下培养，昼夜温度为15 ℃/7 ℃，计算其冷害指数，评价18个番茄品种的耐低温性并将其分为强耐冷型、弱耐冷型和冷敏感型。根据冷害指数将T1和T3作为强耐冷型品种，T13作为弱耐冷型品种，T10和T11作为冷敏感型品种。测定这5个品种在冷害温度下的叶片相对电导率、气体交换参数和叶绿素荧光参数。结果表明，T1和T3番茄叶片的相对电导率低于T13、T10和T11，T3的净光合速率显著高于其他品种，T1和T3的光化学猝灭系数高于T10和T13，T1的最大光化学效率高于其他品种。综上所述，强耐冷型品种质膜损伤程度低，光合系統受损伤程度低，气孔开合度受低温影响小，光合作用下降幅度小。
关键词：番茄;低温;冷害指数;光合特性
中图分类号：S641.2 文献标志码：A 文章编号：1673-2871（2021）08-049-07
Evaluation of low temperature adaptability and analysis of photosynthetic characteristics in different tomato varieties
LUO Xinhui， LIU Mingyue， HUANG Ke， LIU Yubing， PENG Miao， WANG Junwei
（Key Labortory for Vegetable Biology of Hunan Province/Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding， Ministry of Education/College of Horticulture， Hunan Agricultural University， Changsha 410128， Hunan， China）
Abstract： 18 tomato varieties were used as materials in this study， cold damage temperature was set， the growth index of tomato and the cold damage index were recorded. The 18 tomato varieties were classified
关键词：番茄;低温;冷害指数;光合特性
中图分类号：S641.2 文献标志码：A 文章编号：1673-2871（2021）08-049-07
Evaluation of low temperature adaptability and analysis of photosynthetic characteristics in different tomato varieties
LUO Xinhui， LIU Mingyue， HUANG Ke， LIU Yubing， PENG Miao， WANG Junwei
（Key Labortory for Vegetable Biology of Hunan Province/Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding， Ministry of Education/College of Horticulture， Hunan Agricultural University， Changsha 410128， Hunan， China）
Abstract： 18 tomato varieties were used as materials in this study， cold damage temperature was set， the growth index of tomato and the cold damage index were recorded. The 18 tomato varieties were classified