4种地锦属植物半致死低温及抗寒生理指标研究  

Study on Semi-lethal Low Temperatures and Physiological Index for Cold Resistance of Four Parthenocissus Species

作　　者：杨学军[1,2] 孙振元[1] 韩蕾[1] 巨关升[1] 彭镇华[1] 

机构地区：[1]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091 [2]北京草业与环境研究发展中心,北京100097

出　　处：《林业科学研究》2010年第1期147-150,共4页Forest Research

基　　金：国家科技支撑计划“优质抗逆专用地锦新品种选育”(2006BAD01A19-5)

摘　　要：Treated by freezing,1-year-old dormant branches of four Parthenocissus species were used as test materials to determine the electro-conductivities.According to Logistic equation fitting,the semi-lethal low temperatures were calculated.The result showed that the semi-lethal low temperatures and freezing tolerance of the examined species were ranked as: Parthenocissus quinquefolia(-16.63 ℃),P.tricuspidata(-10.78 ℃),P.laetecirens(-10.29 ℃),and P.henryana(-7.72 ℃).By comparing several physiological indexes including water saturation deficit,soluble sugar,soluble protein,MDA,and proline contents,it was found that after cold stressing for a whole winter the soluble sugar and proline contents were well correlated to semi-lethal low temperatures.So both of them could be used as the physiological indexes for cold tolerance identification and selection of cold-resistant variety.Treated by freezing, 1-year-old dormant branches of four Parthenocissus species were used as test materials to determine the electro-conductivities. According to Logistic equation fitting, the semi-lethal low temperatures were calculated. The result showed that the semi-lethal low temperatures and freezing tolerance of the examined species were ranked as ： Parthenocissus quinquefolia （ - 16.63 ℃ ）, P. tricuspidata （ - 10.78 ℃ ）, P. laetecirens（ -10.29 ℃ ）, and P. henryana（ -7.72 ℃ ）. By comparing several physiological indexes including water saturation deficit, soluble sugar, soluble protein, MDA, and proline contents, it was found that after cold stressing for a whole winter the soluble sugar and proline contents were well correlated to semi-lethal low temperatures. So both of them could be used as the physiological indexes for cold tolerance identification and selection of cold-resistant variety.

关 键 词：地锦属 半致死低温 水分饱和亏 可溶性糖 可溶性蛋白 丙二醛 脯氨酸 

分 类 号：S731.2[农业科学—林学]