| 一氧化氮缓解盐胁迫对玉米生长的抑制作用 |
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| 引用本文： | 张艳艳,刘俊,刘友良.一氧化氮缓解盐胁迫对玉米生长的抑制作用[J].植物生理与分子生物学学报,2004,30(4):455-459. |
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| 作者姓名： | 张艳艳 刘俊 刘友良 |
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| 作者单位： | 南京农业大学生命科学学院,南京,210095 |
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| 摘 要： | 研究了一氧化氮(nitric oxide,NO)对NaCl 100mmol/L胁迫下玉米幼苗生长的影响.结果表明:0.1～200μmol/L的NO供体硝普钠(sodium nitroprusside,SNP),特别是100μmol/L SNP处理可以显著提高盐胁迫下玉米幼苗的干物质积累速率.100μmol/L的SNP处理还显著提高了叶绿素含量、植株体内K /Na 比和(Spd Spm)/Put的比值,降低膜透性.推测NO对盐胁迫下玉米生长抑制的缓解作用是由于NO促进根系对K 的选择性吸收及其向地上部的运输,而降低对Na 的吸收及其向地上部的运输,并促进Put向Spd和Spm的转化.
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| 关 键 词： | 一氧化氮 玉米 盐胁迫 多胺 离子 |
| 修稿时间： | 2003年12月31 |
Nitric Oxide Alleviates Growth Inhibition of Maize Seedlings Under NaCl Stress |
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| ZHANG Yan-Yan,LIU Jun,LIU You-Liang.Nitric Oxide Alleviates Growth Inhibition of Maize Seedlings Under NaCl Stress[J].Journal Of Plant Physiology and Molecular Biology,2004,30(4):455-459. |
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| Authors: | ZHANG Yan-Yan LIU Jun LIU You-Liang |
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| Institution: | College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China. |
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| Abstract: | The effect of nitric oxide (NO) on growth of maize seedlings under 100 mmol/L NaCl stress was studied. The results showed that 0.1-200 mumol/L sodium nitroprusside (SNP), especially 100 mumol/L SNP, increased dry accumulation in maize seedlings significantly, the chlorophyll content, K(+)/Na(+) ratio and (Spd+Spm)/Put ratio, and decreased electrolyte leakage. These results suggest that NO may alleviate the damage caused by NaCl stress through increasing K(+) uptake and transport to shoots and decreasing Na(+) uptake and transport, and also through enhancing the conversing of Put to Spd and Spm. |
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| Keywords: | NO maize NaCl stress polyamine ion |
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