| 4个杜鹃品种的抗旱性比较及生理响应 |
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| 引用本文： | 胡肖肖,金荷仙,庄晓林,唐宇力,段玉侠.4个杜鹃品种的抗旱性比较及生理响应[J].福建林学院学报,2017,37(4). |
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| 作者姓名： | 胡肖肖 金荷仙 庄晓林 唐宇力 段玉侠 |
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| 作者单位： | 1. 浙江农林大学风景园林与建筑学院,浙江 临安,311300;2. 杭州西湖风景名胜区灵隐管理处,浙江 杭州,310013 |
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| 基金项目： | 国家自然科学基金重点项目，杭州西湖风景名胜区(市园文局)科研计划项目，校人才启动基金项目 |
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| 摘 要： | 以4个5年生杜鹃品种为试验材料,采用盆栽控水法研究杜鹃植株在不同干旱程度下的形态与生理响应。旱害指数结果表明:‘国旗红’抗旱性最强,‘玉蝴蝶’次之,胭脂蜜抗旱性最弱。随着干旱胁迫程度加深,杜鹃的相对含水量显著下降(P<0.05);丙二醛(MDA)含量、相对电导率随干旱胁迫程度加深呈上升趋势;而过氧化氢酶(CAT)活性、可溶性糖含量则因品种的不同而表现出不同的结果,‘国旗红’、‘大青莲’、‘胭脂蜜’的CAT活性在重度胁迫后下降,这时可能已经达到植株耐受干旱的极限,清除氧自由基的能力降低。通过相关性和主成分分析发现CAT活性、可溶性糖、MDA含量、相对电导率、相对含水量与杜鹃抗旱性密切相关。采用隶属函数法对4个杜鹃品种的抗旱性进行综合评价,结果表明,4个品种抗旱性强弱依次为‘国旗红’>‘玉蝴蝶’>‘大青莲’>‘胭脂蜜’,与旱害指数结果一致。
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| 关 键 词： | 杜鹃 抗旱性 生理响应 主成分分析 隶属函数法 |
Drought resistance difference and physiological response of 4 Rhododendron cultivars |
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| HU Xiaoxiao,JIN Hexian,ZHUANG Xiaolin,TANG Yuli,DUAN Yuxia.Drought resistance difference and physiological response of 4 Rhododendron cultivars[J].Journal of Fujian College of Forestry,2017,37(4). |
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| Authors: | HU Xiaoxiao JIN Hexian ZHUANG Xiaolin TANG Yuli DUAN Yuxia |
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| Abstract: | The experiment was conducted to study the morphological and physiological of 4 cultivars of 5-year-old Rhododendron under different drought stress. The results of drought damage index showed that the order of drought resistance from strong to weak was'Guoqihong'>'Yuhudie'>'Daqinglian'>'Yanzhimi' . With the drought stress increase, the relative water content of Rhododendron decrease significantly ( P<0. 05) while Malondialdehyde ( MDA) content and relative conductivity had a upward trend; Catalase (CAT) activity and soluble sugar showed different results due to various cultivars. The CAT activity of 'Guoqihong', 'Daqinglian' and 'Yanzhimi' decreased under the severe drought stress which was related to the plants have reached the limit drought stress and the ability of scavenging oxygen free radicals become decrease. Correlation analysis and principal component analysis showed that CAT, soluble sugar, MDA, relative conductivity and relative water content were closely related with drought resistance of Rhododendron. Drought resistance of 4 Rhododendron cultivars from strong to weak, evaluated by the method of membership function, were'Guoqihong'>'Yuhudie'>'Daqinglian'>'Yanzhimi' which was consistent with drought damage index. |
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| Keywords: | Rhododendron drought resistance physiological response principal component analysis membership function method |
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