不同品种番茄幼苗低温适应性评价及光合特性分析  

Evaluation of low temperature adaptability and analysis of photosynthetic characteristics in different tomato varieties

作　　者：罗鑫辉 刘明月[1] 黄科[1] 刘玉兵 彭淼[1] 王军伟[1] 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)

机构地区：[1]蔬菜生物学湖南省重点实验室·园艺作物种质创新与新品种选育教育部工程研究中心·湖南农业大学园艺园林学院,长沙410128

出　　处：《中国瓜菜》2021年第8期49-55,共7页China Cucurbits And Vegetables

基　　金：湖南省现代农业(蔬菜)产业技术体系;湖南省科技创新计划(2018NK2022);中国农业科学院科技创新工程协同任务(CAAS-XTCX2019025);2018年江苏省产学研合作项目“温室蔬菜新品种引进及绿色生产技术开发与示范”(BY2018061)。

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,光合系统受损伤程度低,气孔开合度受低温影响小,光合作用下降幅度小。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 into cold type,weak resistance to cold type and cold sensibility type.According to the cold damage index,T1 and T3 were regarded as typical of strong resistance to cold type,T13 as typical with weak cold resistance,T10 and T11 as cold sensibility type.The gas exchange parameters and chlorophyll fluorescence of the five cultivars under the cold damage temperature were determined,the result showed that the Pn of seedling leaves of T3 was the highest.The strong cold resistance type could maintain high stomatal conductance and CO2 utilization under cold damage temperature,photosynthesis was less inhibited.qP of T1 and T3 were significantly higher those of T10 and T13.NPQ of T1 was significantly higher than that of T10,which was the lowest of th five varieties.In conclusion,under cold damage temperature,the morphological index,net photosynthetic rate and chlorophyll fluorescence of strong cold resistance were better than those of weak cod resistance type and cold sensibility type.

关 键 词：番茄 低温 冷害指数 光合特性 

分 类 号：S641.2[农业科学—蔬菜学]