自然降温对红花玉兰抗寒生理指标的影响  

Study on the Influences of Naturel Cooling on the Cold Tolerance Physiological Indicators of Magnolia wufengensis

作　　者：梁大伟[1] 马履一[1] 贾忠奎[1] 郝跃[1] 怀慧明[1] 朱仲龙[1] 王晓玲[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《林业科技开发》2010年第2期23-26,共4页China Forestry Science and Technology

基　　金：国家林业局重点项目(编号:2006-39);北京市教委学科建设与研究生培养项目"北京城市生态环境建设产学研联合培养研究生基地资助(二期资助)"

摘　　要：在自然降温过程中,以红花玉兰、紫玉兰、黄玉兰、望春玉兰为试验材料,对枝条的超氧化物歧化酶(SOD)、过氧化氢酶(POD)和过氧化物酶(CAT)活性以及丙二醛(MDA)含量等指标进行了研究。结果表明:随着温度的逐渐降低,4种玉兰丙二醛含量逐渐增大,红花玉兰丙二醛含量相对较高,受害程度比较大;随着温度的降低,SOD、POD、CAT 3种酶的活性逐渐增强,红花玉兰3种酶的活性总体高于望春玉兰,保护机制要好于望春玉兰。通过低温锻炼,红花玉兰对低温有一定的适应能力。During the nature air cooling, the activities of superoxide dimutase （SOD）and peroxides （POD） and the content of malondialdehyde （MDA） in the four Magnolia varieties were studied in this paper. The result showed that MDA content in the four varieties increased, and MDA content in the M. biondii was higher than others ; SOD, POD and CAT activities of all the varieties became high, and the enzyme activities in M. wufengensis was higher than M. biondii, M. wufengensis was superior to M. biondii in the self-protection ability. Through the way of low-temperature acclimation, M.wufengensis would get cold resistance ability.

关 键 词：自然降温 红花玉兰 抗寒性 生理指标 

分 类 号：S718.43[农业科学—林学]