| 水分胁迫对2种基因型杜鹃生理生化特性的影响 |
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| 引用本文： | 李波,吴月燕,崔鹏.水分胁迫对2种基因型杜鹃生理生化特性的影响[J].浙江农业学报,2011(5). |
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| 作者姓名： | 李波 吴月燕 崔鹏 |
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| 作者单位： | 浙江万里学院生物与环境学院;浙江大学农业与生物技术学院; |
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| 基金项目： | 浙江省重大科技专项重点农业项目(2009C12092) |
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| 摘 要： | 以盆栽西洋杜鹃(Rhododendron hybridum)和毛鹃(Rhododendron pulchrum)为材料,研究了在连续干旱、水湿胁迫下两种杜鹃所发生的生长和生理生化响应。试验表明:随着干旱胁迫程度的加深,西洋杜鹃和毛鹃叶片的相对含水量及叶绿素含量显著下降,叶片出现不同程度的干枯和死亡现象;MDA含量和叶片电导率显著上升;可溶性糖含量上升,而可溶性蛋白质含量下降;超氧化物歧化酶(SOD)、过氧化氢酶(CAT)及过氧化物酶(POD)活性先上升后下降,其中SOD活性在中度干旱胁迫下达到最大值,CAT和POD则在轻度胁迫时含量最高;随着干旱胁迫程度的加深,各项生理指标对比表明西洋杜鹃比毛鹃耐旱。在水湿胁迫下,西洋杜鹃和毛鹃植株受害较轻,未出现死亡现象,叶片各项生理指标变化相对平缓,且与对照相比差异不明显;随着水湿胁迫程度的加强,西洋杜鹃的叶绿素含量与抗氧化酶活性等比毛鹃下降更明显,表明毛鹃更耐水湿胁迫。本研究表明,在一定时间内杜鹃属植物能更好地适应水湿环境。
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| 关 键 词： | 杜鹃 水分胁迫 生理生化特性 抗氧化酶系统 |
Effects of water stress on physiological and biochemical characteristics in two genotypic Rhododendron |
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| LI Bo,WU Yue-yan,CUI Peng.Effects of water stress on physiological and biochemical characteristics in two genotypic Rhododendron[J].Acta Agriculturae Zhejiangensis,2011(5). |
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| Authors: | LI Bo WU Yue-yan CUI Peng |
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| Institution: | LI Bo1,2,WU Yue-yan1,CUI Peng1,2(1College of Biology and Environment,Zhejiang Wanli University,Ningbo 315100,China,2College of Agriculture and Biotechnology,Zhejiang University,Hangzhou 310029,China) |
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| Abstract: | A series of experiments were conducted using Rhododendron hybridum and Rhododendron pulchrum to understand the effects on physiological and biochemical characteristics under different water stress.The results indicated that leaves relative water content and chlorophyll concentration of both decreased significantly and leaves appeared senescence even death with the increase of drought stress;The concentration of malondialdehyde(MDA) and leaves relative conductivity increased significantly;The concentration o... |
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| Keywords: | Rhododendron water stress physiological-biochemical characteristics antioxidant enzyme system |
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