两种地被植物的耐热性生理特性研究  

Physiological Characteristics of Heat Tolerance in Two Ground Covering Plants

作　　者：张朝阳[1] 许桂芳[1] 

机构地区：[1]长沙环境保护职业技术学院,湖南长沙410004

出　　处：《西北林学院学报》2009年第1期49-52,共4页Journal of Northwest Forestry University

基　　金：湖南省环境保护科技基金项目(湘财建指2005-115)

摘　　要：以过路黄与金叶过路黄为材料,通过盆栽在人工气候箱内进行高温胁迫,对过路黄与金叶过路黄叶片在不同程度高温胁迫下的7个生理指标的变化进行了综合评价,来选择耐热性优良的地被植物。结果表明:在高温胁迫下,过路黄与金叶过路黄叶片的质膜透性上升;超氧化物歧化酶(SOD)、过氧化物酶(POD)活性先上升,后下降;叶绿素总量、脯氨酸含量在一定程度内均增加,只是变化的幅度和进程不同。经几项生理指标的综合分析,得出过路黄比金叶过路黄具有较强的耐高温能力。Taking the seedlings of Lysimachia christinae Hance. and L. nurnmularia ‘Aurea＇ as experimental materials, through high-temperature stress treatment on pot seedlings in the manpower climate box, seven physiological indices after the high-temperature treatment were measured to comprehensively evaluate the tolerance to high-temperature stress of seedlings of different ground covering plants. The results showed that the high-temperature stress treatment could damage membrane and increased membrane permeability of leaf cells, the activities of SOD and POD increased under the light high-temperature stress, and then declined under the severe high-temperature stress. The contents of praline, chlorophylls and soluble protein in leaves increased under high-temperature stress, those kinds of changes differed from extend and procedure. Through comprehensive analysis of these physiological and biochemical characters, it was concluded that the high-temperature resistant ability of two Lysirnachia species decreased in order of L. christinae, L. nummularia ‘ Aurea＇.

关 键 词：过路黄 金叶过路黄 高温胁迫 生理特性 

分 类 号：S718.43[农业科学—林学]