外源抗热剂对马缨杜鹃抗热性的影响初探  

Effects of Heat-resistant Agent in Improving Heat Tolerance of Rhododendron delavayi

作　　者：汪蓉[1,2] 叶向斌[1] 岳保超[1] 刘黾 管璞怡 

机构地区：[1]仲恺农业工程学院,广东广州510225 [2]岭南园林股份有限公司,广东东莞523125

出　　处：《广东园林》2015年第6期26-29,共4页Guangdong Landscape Architecture

基　　金：省部产学研结合项目(2012B090900001)专项资金资助

摘　　要：以4年生马缨杜鹃Rhododendron delavayi为材料,采用4因素2水平正交试验设计,探讨不同抗热剂及其不同浓度处理对马缨杜鹃抗热性的影响。结果显示:在高温胁迫下(42℃)施用对氨基水杨酸(PAS)、海藻酸(AA)和氯化钙(Ca Cl2),对马缨杜鹃抗热性有显著的影响,22℃时以200mg/L PAS+400mg/L AA+800mg/L Ca Cl2组合处理对提高马缨杜鹃的抗热性效果最好,42℃时则以200mg/L PAS+200mg/L AA+1200mg/L Ca Cl2组合处理效果最佳。Four factors on two levels of orthogonal design experiments were conducted to study the effects of temperature and heat-resistant agent in improving the heat tolerance of four annual Rhododendron delavayi. The main results are as follows： Under the stress of high temperature（42℃）, there were significant effects on R.delavayi. The seedlings with the treatments of PAS、AA and Ca Cl2,which played a role in maintaining the seedlings＇ normal physiological activities under the stress of high temperature. 22℃ ： 200mg/L PAS＋400mg/L AA＋800mg/L Ca Cl2 is the best treatment to increase seedlings＇ heat tolerance. 42℃ ： PAS（200mg/L）＋AA（200mg/L）＋Ca Cl2（1200mg/L） can increase plants＇ heat tolerance observably.

关 键 词：马缨杜鹃 高温胁迫 抗热剂 抗热性 

分 类 号：S685.21[农业科学—观赏园艺]