6种观果植物的耐热性研究  

Studies on the Thermotolerance in Six Ornamental Fruit Plants

作　　者：陈燕[1] 刘东焕[1] 陈进勇[1] 温韦华[1] 赵世伟[1] 

机构地区：[1]北京市植物园/北京市花卉园艺工程技术研究中心,北京100093

出　　处：《中国农学通报》2015年第16期32-36,共5页Chinese Agricultural Science Bulletin

基　　金：北京市科委"高效抗逆园林植物新品种的选育与推广"(Z141100006014036);北京市公园管理中心"几种特色观果植物的应用研究"

摘　　要：为筛选出适合北方夏季生长的观果植物,增加北方地区观果植物种类,丰富该地区植物景观,以不同原产地的6种观果植物叶片为试验材料,分别测定其在不同梯度温度处理条件下叶片相对电导率,结合Logistic方程计算其半致死温度(LT50),并通过夏季田间及高温胁迫形态学观察进行验证。结果表明:随着温度的升高,6种观果植物叶片的细胞伤害率增长速度均呈现"慢,快,慢"的趋势,即处理温度与细胞伤害率之间呈"S"形曲线;6种观果植物高温半致死温度由高到低分别为:蓝叶忍冬(62.31℃)>欧洲火棘(61.67℃)>紫珠(61.10℃)>海州常山(57.12℃)>吴茱萸(57.10℃)>刺梨(53.23℃);形态学观察结果与电导率法测定基本一致,半致死温度可以作为其耐热性的评价指标。In order to select suitable ornamental fruit plants growing in summer in the north,increase thekinds of ornamental fruit plants and enrich plant landscape in northern China,six ornamental fruit plants fromdifferent native habitats were used as materials to determine the semi-lethal temperature（LT50） by electricconductivity method combined with Logistic equation.Their morphological changes were observed in the fieldduring summer and under high temperature stress respectively.The results indicated that with the rise oftreated temperature,the rate of injured cells from the leaf segments of six ornamental fruit plants increasedwith a trend of‘slow-fast-slow＇,the relationship between the treatment of temperature for leaf species and therate of injured cells varied in a‘S＇curve model.The LT50 of the tested ornamental fruit plants was indescending order as： Lonicera korolkowii（62.31℃）,Pyracantha coccinea（61.67℃）,Callicarpa bodinieri（61.10℃）,Clerodendrum trichotomum（57.12℃）,Tetradium ruticarpum（57.10℃）,Ribes burejense（53.23℃）,which was similar to the morphological observation,LT50 could be used as their thermotolerance evaluation index.

关 键 词：观果植物 耐热性 半致死温度 相对电导率 

分 类 号：S686[农业科学—观赏园艺]