| 2种紫花苜蓿高温半致死温度与耐热性研究 |
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| 引用本文： | 高桂娟,韩瑞宏,李志丹.2种紫花苜蓿高温半致死温度与耐热性研究[J].热带作物学报,2009,33(3):25-27. |
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| 作者姓名： | 高桂娟 韩瑞宏 李志丹 |
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| 作者单位： | 广东教育学院生物系;仲恺农业工程学院农业与园林学院;中国热带农业科学院热带作物品种资源研究所 |
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| 基金项目： | 广东教育学院院基金“提高采石悬崖生态恢复效果的最佳植物组合研究” |
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| 摘 要： | 运用电导率法对秋眠级不同的2个苜蓿品种“WL-525HQ”和“WL-232HQ”进行耐热性测定。叶片经梯度高温处理后,细胞伤害率呈“S”型曲线。通过Logistic方程拐点确定半致死温度,“WL-525HQ”和“WL-232HQ”的高温半致死温度分别为54.13 ℃和52.26 ℃,“WL-525HQ”的耐热性强于“WL-232HQ”,其结果与2种苜蓿的实际耐热趋势一致。
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| 关 键 词： | 苜蓿 高温 Logistic方程 半致死温度 |
Detection of Semi-lethal High Temperature and Heat Tolerance for
Two Cultivars of Alfalfa |
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| GAO Guijuan,HAN Ruihong and LI Zhidan.Detection of Semi-lethal High Temperature and Heat Tolerance for
Two Cultivars of Alfalfa[J].Chinese Journal of Tropical Crops,2009,33(3):25-27. |
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| Authors: | GAO Guijuan HAN Ruihong and LI Zhidan |
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| Institution: | Department of Biology, Guangdong Education Institute;College of Agriculture and Landscape Architecture, Zhongkai University of Agriculture and
Engineering;Tropical Crops Genetic Resources Institute, CATAS |
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| Abstract: | Two alfalfa cultivars with different fall dormancy levels, "WL-525HQ" and "WL-232HQ", were treated with high temperatures and their heat tolerance measured by using electrical conductivity method. After the leaves were treated with gradient high temperatures their cells were injured and showed a sigmoid response to the temperatures. The Logistic equation was used to determine the semi-lethal temperatures for the two varieties by spotting the turning points of the inflexion phase of the curve. The semi-lethal temperatures for the cultivars "WL-525HQ" and "WL-232HQ" was 54.13 °C and 52.26 °C respectively, indicating the cultivar "WL-525HQ" had a higher tolerance to heat than the cultivar "WL-232HQ", which coincides with the results from the field. |
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| Keywords: | Alfalfa high temperature Logistic equation semi-lethal temperature |
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