| 濒危树种越南青冈的半致死温度研究 |
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| 引用本文： | 李谦盛,;邓敏,;沈娟,;周纯亮. 濒危树种越南青冈的半致死温度研究[J]. 云南林业科技, 2014, 0(5): 8-12 |
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| 作者姓名： | 李谦盛, 邓敏, 沈娟, 周纯亮 |
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| 作者单位： | [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//上海辰山植物园,上海201602 |
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| 基金项目： | 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）. |
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| 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。
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| 关 键 词： | 越南青冈 电解质渗出率 半致死温度 Logistic方程 |
Study on the Lethal Temperature of the Endangered Cyclobalanopsis austrocochinchinensis |
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| Affiliation: | LI Qian-sheng, DENG Min, SHEN Juan, ZHOU Chun-liang (1. School of Ecology, Shanghai Institute of Technology, Shanghai, 201415, P. R. China; 2. Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences/Shanghai Chenshan Botanical Garden, Shanghai 201602, P. R. China) |
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| Abstract: | 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 . |
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| Keywords: | Cyclobalanopsis austrocochinchinensis electrolyte leakage lethal temperature Logistic equation |
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