| 不同种源香椿抗寒性试验 |
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| 引用本文： | 杨玉珍,彭方仁.不同种源香椿抗寒性试验[J].浙江林业科技,2009,29(6). |
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| 作者姓名： | 杨玉珍 彭方仁 |
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| 作者单位： | 1. 郑州师范高等专科学校,河南,郑州,450044
2. 南京林业大学,森林资源与环境学院,江苏,南京,210037 |
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| 基金项目： | 国家自然科学基金，河南省重点科技攻关项目 |
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| 摘 要： | 以河南西峡等10个种源1年生香椿为材料,研究了不同低温处理条件下离体茎段的相对电导率,并与活体茎段及自然降温过程中各种源的表现进行了分析比较.用Logistic方程拟合曲线,求出拐点温度即低温半致死温度(LT_50),作为评价各种源香椿抗寒能力的参考指标.结果表明:各种源离体茎段相对电导率随处理温度的降低而呈"S"形曲线上升,其LT_50最低者为山东济南种源为-7.94℃,最高者为福建霞浦种源为-3.88℃;10个种源香椿抗寒性由大到小依次为山东济南、山东荷泽、河南西峡、陕西安康、江苏南京、四川广元、湖南洞口、湖北随州、贵州黔西南、福建霞浦,与大田自然越冬条件下各种源的表现基本一致.
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| 关 键 词： | 香椿 种源 相对电导率 低温半致死温度(LT_(50)) 抗寒性 |
Comparison on Cold Resistance of Different Toona sinensis Provenances |
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| YANG Yu-zhen,PENG Fang-ren.Comparison on Cold Resistance of Different Toona sinensis Provenances[J].Journal of Zhejiang Forestry Science and Technology,2009,29(6). |
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| Authors: | YANG Yu-zhen PENG Fang-ren |
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| Abstract: | 1-year Toona sinensis seedlings from ten provenances were chosen for study of their cold resistance. Relative electrical conductivity of in vitro stems was measured under different temperature treatment, and was compared with that of living ones. The turning point temperature (half lethal temperature/LT_50) was calculated by logistic equation. LT50 was for reference indicator of cold resistance of tested provenances. The results showed that the relative electrical conductivity of in vitro stems of the tested provenances increased as a S-curve with decrease of temperature treatment, and the lowest of LT_50 was -7.94℃, from Jinan of Shandong, and the highest, -3.88℃, from Xiapu of Fujian. The test indicated that provenance from Jinan of Shandong had the strongest cold resistance, followed by Heze of Shandong, Xixia of Henan, Ankang of Shaanxi, Nanjing of Jiangsu, Guangyuan of Sichuan, Dongkou of Hunan, Suizhou of Hubei, Qianxinan of Guizhou, Xiapu of Fujian. The result concluded that LT_50 of intro and living stems was similar. |
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| Keywords: | Toona sinensis provenances relative electrical conductivity half lethal temperature/LT_50 cold resistance |
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