ATPase与植物抗盐性 |
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引用本文: | 邓林,陈少良. ATPase与植物抗盐性[J]. 植物学通报, 2005, 0(Z1) |
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作者姓名: | 邓林 陈少良 |
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作者单位: | 北京林业大学生物科学与技术学院 北京100083(邓林),北京林业大学生物科学与技术学院 北京100083(陈少良) |
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基金项目: | 国家自然科学基金重点项目(30430430),全国高校优秀博士学位论文作者专项基金(200152),高等学校优秀青年教师教学科研奖励计划(2002-323)联合资助 |
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摘 要: | 本文综述了高等植物细胞ATPase在盐胁迫下的活性变化及其调控机制。V型H+_ATPase与细胞离子区隔化和植物抗盐性密切相关。盐胁迫提高抗盐植物液泡膜H+_ATPase活性,主要是通过增加V型H+_ATPase主要功能亚基的基因表达以及蛋白质合成。盐胁迫通常降低质膜H+-ATPase活性,很可能是由于酶蛋白质合成受阻,质膜H+-ATPase活性的变化与盐胁迫的强度和时间长短有关。此外,本文还对ABA和Ca2+-CaM等胁迫信号物质对ATPase活性的调控及其与植物抗盐性的关系进行了总结。研究ATPase对盐胁迫的响应和调控机制,有助于阐明植物的盐生境适应机制,也有利于植物的抗盐育种工作。
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关 键 词: | 盐胁迫 液泡膜H+_ATPase 质膜H+_ATPase Ca2+-ATPase 耐盐性 |
ATPase and Salt Resistance in Plants |
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Abstract: | The review summarizes variations in ATPase activity under NaCl stress conditions and the possible regulation mechanisms in higher plants. Vacuolar H+_ATPase showed higher correlation with plant salinity tolerance because of its contribution to salt ion compartmentation. In general, V-H+_ATPase activity is increased in salt-tolerant plant species, which presumably results from the increased genetic expression and synthesis of tonoplast H+_ATPase subunits under saline conditions. Salinity results in a decreased activity of plasma membrane H+_ATPase, which is the result of reduced H+_ATPase synthesis. However, the effects of salt stress on plasma membrane H+_ATPase activity depend on the intensity and duration of salt stress. In addition, the effect of salt stress-induced signal transduction on ATPase control and rel- evance to salinity tolerance is elucidated. Collectively, understanding ATPase responses to NaCl stress is favorable for elucidating plant adaptation mechanisms and subsequent plant breeding. |
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Keywords: | Salt stress Vacuolar H+_ATPase Plasma membrane H+_ATPase Ca2+-ATPase Saltt olerance |
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