| 植物对干旱胁迫的分子反应 |
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| 引用本文： | 宋松泉,王彦荣. 植物对干旱胁迫的分子反应[J]. 应用生态学报, 2002, 13(8): 1037-1044 |
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| 作者姓名： | 宋松泉 王彦荣 |
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| 作者单位： | 1. 中国科学院西双版纳热带植物园,勐腊,666303
2. 兰州大学草地农业科技学院,甘肃草原生态研究所,兰州,730020 |
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| 基金项目： | 国家重点基础研究发展规划资助项目 (G2 0 0 0 0 4870 4) |
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| 摘 要： | 干旱胁迫是影响植物生长发育的主要因子，渗透保护剂的合成和积累，脱水伤害的修复，自由基清除酶和LEA蛋白基因表达的增量调节能增加植物的耐干旱性。植物在干旱条件下至少有4条信号转导途径，其中2条信号途径是依赖ABA的，另外2条途径是不依赖ABA的，在植物干旱胁迫的信号转导中，双组分的组氨酸激酶可能起渗透感受器的作用，Ca^2 和IP3可能是脱水信号的第2信使，转基因植物是一种评价编码蛋白功能的良好系统。
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| 关 键 词： | 植物 干旱胁迫 分子反应 |
| 文章编号： | 1001-9332(2002)08-1037-08 |
| 修稿时间： | 2002-04-14 |
Molecular response of plant to drought stress |
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| SONG Songquan and WANG Yanrong. Molecular response of plant to drought stress[J]. The journal of applied ecology, 2002, 13(8): 1037-1044 |
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| Authors: | SONG Songquan and WANG Yanrong |
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| Affiliation: | Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menla 666303. sgsong@xtbg.org.cn |
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| Abstract: | Drought stress is a bottleneck factor for plant growth and development . Synthesis and accumulation of osmoprotectants,up regulation of gene expression implicated in repair of desiccation injury,free radical scavenging enzymes and late embryogenesis abundant(LEA)protein could increase the drought tolerance of plant. There are at least four pathways of signal transduction in plant subjected to drought stress,two are abscisic acid(ABA) dependent,and two are ABA independent. In the signal transduction of plants encountered drought stress,two component His protein kinase could act as an osmosensor,and Ca 2+ and inositol triphosphate(IP3)could be the second messenger for dehydration signaling. Transgenic plant is an excellent system in evaluating function of encoded protein. |
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| Keywords: | Drought stress Gene expression ABA Signaling transduction Transgenic plant. |
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