6种景天科多肉植物短时高温胁迫耐热性评价  

Heat-Tolerance Evaluation of 6 Kinds of Crassulaceae Succulent Plants Under Brief Exposure to High Temperature Stress

作　　者：吴玮[1] 胡进峰[1] 陈峰[1] 王俊[1] 王长方[1] Wu Wei;Hu Jinfeng;Chen Feng;Wang Jun;Wang Changfang(Institute of Plant Protection,Fujian Academy of Agricultural Sciences,Fuzhou 350013)

机构地区：[1]福建省农业科学院植物保护研究所,福州350013

出　　处：《中国农学通报》2021年第1期67-70,共4页Chinese Agricultural Science Bulletin

基　　金：省属公益类科研院所基本科研专项“多肉植物蚧壳虫非化学防治方法研究”(2017R1025-7)。

摘　　要：为评价多肉植物的耐热性,以6种景天科多肉品种为材料,通过短时高温胁迫处理,用电导率法结合Logistic方程对其耐热性进行鉴定。结果表明,随着处理温度升高,供试材料相对电导率逐渐升高,呈"S"型曲线变化趋势。供试材料半致死温度(LT50)介于53.17~61.68℃之间。根据LT50结果,确定供试的6个景天科多肉品种的耐热性由强到弱依次为黑法师、唐印、观音莲、冰梅、福娘、乙女心。The heat-tolerance of 6 kinds of Crassulaceae succulent plants was studied.The relative electrical conductivity combined with Logistic equation was applied to evaluate their heat-tolerance after brief exposure to high temperature.Results indicated that the relative electrical conductivity of these tested Crassulaceae succulent plants increased gradually when the temperature rose.And the incidence of the relative electrical conductivity with temperature fitted into the curve of"S".Semi-lethal temperature(LT50)of these tested plants ranged from 53.17℃to 61.68℃.Based on LT50 values,the heat-tolerance of the six tested Crassulaceae succulent plants from high to low in sequence was Aeonium arboretum‘Zwartkop’,Kalanchoe tetraphylla,Sempervivum tectorum‘Oddity’,Echeveria‘Rasberry Ice’,Cotyledon orbiculata‘Oophylla’and Sedum pachyphyllum‘Rose’.

关 键 词：景天科 短时高温 耐热性 半致死温度 电导率 

分 类 号：S477[农业科学—农业昆虫与害虫防治]