濒危树种越南青冈的半致死温度研究  

Study on the Lethal Temperature of the Endangered Cyclobalanopsis austrocochinchinensis

作　　者：李谦盛[1] 邓敏[2,3] 沈娟[1] 周纯亮[1] 

机构地区：[1]上海应用技术学院生态学院,上海201418 [2]中国科学院上海辰山植物科学研究中心 [3]上海辰山植物园,上海201602

出　　处：《西部林业科学》2014年第5期8-12,共5页Journal of West China Forestry Science

基　　金：国家自然科学基金(31270267);上海市教育委员会科研创新项目(12YZ157);教育部留学回国人员科研启动基金;上海市绿化与市容管理局科技攻关项目(F112419)

摘　　要：越南青冈为壳斗科濒危树种。通过越南青冈2年生温室容器苗叶片和茎段分别在9个高温和8个低温温度处理后,测定其电解质渗出率,利用Logistic方程计算其高温、低温的半致死温度(LT50)。结果表明,叶片和枝条组织的电解质渗出率与处理温度之间均呈"S"型曲线,Logistic方程拟合度较高;计算得到越南青冈2年生苗木叶片的高温、低温半致死温度分别为42.04℃和-1.78℃,茎段的高温、低温半致死温度分别为46.62℃和-9.72℃。研究结果可推测越南青冈的潜在地理分布区,为该濒危树种的人工栽培、就地或迁地保护提供依据。Cyclobalanopsis austrocochinchinensis is an endangered tree species of Fagaceae .The electrolyte leakage of leaf and stem from 2-year-old greenhouse container seedling of C.austrocochinchinensis were measured after 9 high and 8 low temperatures treatments .Logistic equation was fitted to calculate the lethal temperature （ LT50 ） . The results showed that electrolyte leakage was a sigmoid response curve to temperature , and fitted the Logistic e-quation very well .The high and low lethal temperature of leaf were 42.04℃and -1.78℃respectively; the high and low LT50 of stem were 46.62℃and -9.72℃respectively .These data are useful for predict the potential ge-ographical distribution of C.austrocochinchinensis, and provide basis for the cultivation , in-situ and ex-situ conser-vation of this endangered tree species .

关 键 词：越南青冈 电解质渗出率 半致死温度 LOGISTIC方程 

分 类 号：Q945.79[生物学—植物学] S718.43[农业科学—林学]