| 干旱胁迫及复水对喀斯特地区柏木幼苗活性氧清除系统的影响 |
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| 作者姓名： | Liu JC Zhong ZC He YJ |
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| 作者单位： | 1. 西南大学三峡库区生态环境教育部重点实验室,重庆400715;重庆市三峡库区植物生态与资源重点实验室,重庆400715;西南大学生命科学学院,重庆400715
2. 贵州大学林学院,贵阳,550025 |
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| 基金项目： | 国家自然科学基金项目(30370279); 中央高校基本科研业务费专项(XDJK2011C018); 西南大学博士基金项目(SWU109009)资助 |
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| 摘 要： | 为了解喀斯特地区适生物种柏木对“干旱-复水”环境的适应机制,以柏木实生苗为材料,研究干旱条件下其活性氧清除系统及复水后的修复能力.结果表明:随干旱处理时间的延长,柏木幼苗相对含水量下降,可溶性蛋白含量先增加后降低,丙二醛(MDA)含量升高;胁迫初期(2周)复水后,MDA含量下降到对照水平,而胁迫中期(4周)和末期(6周)的严重干旱复水后不能降至对照水平;干旱胁迫下超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)均持续上升,复水后,SOD活性有所下降,但仍高于对照,POD和CAT在轻度干旱下复水降至对照水平,而重度干旱后复水则下降幅度较小.轻度胁迫能够提高柏木幼苗可溶性蛋白含量,抑制膜脂过氧化,抵抗水分胁迫,且具有很强的自我修复能力,但严重干旱会使其膜结构严重受损,无法完成自我修复.
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| 关 键 词： | 喀斯特地区 柏木 干旱胁迫 复水 活性氧清除系统 |
Effects of drought stress and re-watering on the active oxygen scavenging system of Cupressus funebris seedlings in Karst area |
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| Liu JC,Zhong ZC,He YJ.Effects of drought stress and re-watering on the active oxygen scavenging system of Cupressus funebris seedlings in Karst area[J].Chinese Journal of Applied Ecology,2011,22(11):2836-2840. |
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| Authors: | Liu Jin-Chun Zhong Zhang-Cheng He Yue-Jun |
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| Institution: | LIU Jin-chun1,2,3,ZHONG Zhang-cheng1,HE Yue-jun4(1Ministry of Education Key Laboratory of Eco-environment in Three Gorges Reservoir Region,Southwest China University,Chongqing 400715,China,2Chongqing Key Laboratory of Plant Ecology and Resource Research in Three Gorges Reservoir Region,3School of Life Science,4College of Forestry,Guizhou University,Guiyang 550025,China) |
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| Abstract: | This paper studied the active oxygen scavenging system of Cupressus funebris seedlings under drought condition and the recovery capability of the system after re-watering,aimed to understand the adaptation mechanisms of C.funebris to the 'drought and re-watering' environment in Karst area.With the increasing time of drought stress,the seedling' s relative water content(RWC) decreased,soluble protein concentration increased first and decreased then,and malondialdehyde(MDA) content increased consistently.The ... |
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| Keywords: | Karst area Cupressus funebris drought stress re-watering active oxygen scavenging system |
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