| 干旱胁迫下柚木叶片生理指标的变化 |
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| 引用本文： | 武勇,陈存及,刘宝,张国防,彭东辉,李生.干旱胁迫下柚木叶片生理指标的变化[J].福建林学院学报,2006,26(2):103-106. |
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| 作者姓名： | 武勇 陈存及 刘宝 张国防 彭东辉 李生 |
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| 作者单位： | 1. 福建农林大学林学院,福建,福州,350002
2. 中国林业科学研究院亚热带林业研究所,浙江,富阳,311400 |
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| 摘 要： | 用聚乙二醇-6000(PEG-6000)在室内模拟干旱条件,对1年生柚木苗进行渗透胁迫.在不同胁迫程度下,游离脯氨酸、可溶性糖、超氧化物岐化酶(SOD)、过氧化物酶(POD)的表现出明显变化:各处理脯氨酸与可溶性糖含量均随胁迫进程表现“低—高”的变化趋势,且以20%的PEG浓度处理增加最明显;活性氧清除酶(SOD、POD)活性随胁迫进程则表现出“低—高—低”的变化趋势.轻度胁迫随胁迫的进行2种酶活性上升缓慢;而重度胁迫虽上升较快,但下降也极快.由此说明,柚木在干旱胁迫下通过增加渗透调解物质含量,降低水势,加强保水力来提高其抗旱能力;并通过增强抗氧化酶活性,提高抗氧化能力,可减轻干旱胁迫伤害.
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| 关 键 词： | 柚木 PEG胁迫 生理指标 |
| 文章编号： | 1001-389X（2006）02-0103-04 |
| 收稿时间： | 2005-06-15 |
| 修稿时间： | 2006-02-20 |
Callus changes of leaves of Tectona grandis under drought stress |
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| WU Yong,CHEN Cun-ji,LIU Bao,ZHANG Guo-fang,PENG Dong-hui,LI Sheng.Callus changes of leaves of Tectona grandis under drought stress[J].Journal of Fujian College of Forestry,2006,26(2):103-106. |
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| Authors: | WU Yong CHEN Cun-ji LIU Bao ZHANG Guo-fang PENG Dong-hui LI Sheng |
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| Institution: | 1. College of Forestry , Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2. Research Institute of Forestry, Chinese Academy of Forestry, Fuyang 311400, China |
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| Abstract: | The seedlings of Tectona grandis were treated with polyethylene glycol 6000(PEG-6000) at different concentration under drought stress.The results indicated that the contents of free proline and soluble sugars(increased) significantly with increasing of dealing time.The treatment of 20% PEG-6000 was the most effective.The activities of POD and SOD firstly increased and then(decreased.) The activities of POD and SOD increased slowly under the treatment of low concentration,but increased and decreased rapidly under strong osmotic stress.These indices showed that T.grandis had an ability to adapt drought stress to some extents by adjusting osmotic substance,and improved antioxygenic ability to reduce damage from drought stress by improving protective(enzymes) activity. |
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| Keywords: | Tectona grandis PEG stress physiological indices |
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