高温胁迫对西洋杜鹃理化指标的影响  

Effects of High Temperature Stress on Physiological-biochemical of Rhododendron hybridum

作　　者：费昭雪[1] 刘莉丽[1] 胡蝶 侯娜 FEI Zhaoxue;LIU Lili;HU Die;HOU Na(Academy of Forestry, Northwest A ＆ F University, Yangling, Shaanxi 712100;Guizhou Academy of Forestry, Guiyang, Guizhou 550005)

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100 [2]贵州省林业科学研究院,贵州贵阳550005

出　　处：《北方园艺》2018年第8期102-105,共4页Northern Horticulture

基　　金：贵州省科技厅-贵州花卉团队服务企业行动计划资助项目(黔科合平台人才[2016]5711)

摘　　要：以3年生西洋杜鹃‘粉珍珠’幼苗为试材,分别在22℃/14℃(14h/10h)、30℃/22℃(14h/10h)和38℃/30℃(14h/10h)下胁迫4d,研究了西洋杜鹃叶片对高温胁迫的理化响应。结果表明:在30℃和38℃胁迫下,植株遭受不同程度的伤害,38℃胁迫对植株造成的伤害程度大于30℃。叶绿素含量随着胁迫温度呈逐渐降低趋势;丙二醛含量在30℃轻度胁迫时下降,38℃重度胁迫时则升高;超氧化物歧化酶活性变化趋势则相反。说明‘粉珍珠’有一定的耐热性,但22℃是其较适宜的生长温度。Three-old-year Rhododendron hybridum ＇fenzhenzhu＇seedling was taken as test materials,the heat tolerance of R.hybridum and some relative physiological indices were determined and analyzed under the stress conditions of 22 ℃/14 ℃（14 h/10 h）,30 ℃/22 ℃（14 h/10 h）and 38 ℃/30 ℃（14 h/10 h）for 4 days.The results showed that at 30 ℃ and 38 ℃,the both stresses led to serious varing degrees damage,and the injury caused by the stress of 38℃ was worse than that 30 ℃.Chlorophyll content was increased with the rise of temperature;content of MDA decreased at 30 ℃light stress condition and increased at heavy stress condition 38℃,while the activity of SOD increased at 30 ℃ and decreased at 38 ℃.It indicated that R.hybridum ＇fenzhenzhu＇had a certain heat resistance and the suitable temperature growth was 22 ℃.

关 键 词：西洋杜鹃 高温胁迫 理化指标 耐热性 

分 类 号：S685.21[农业科学—观赏园艺]