外源多胺对低氧胁迫下黄瓜幼苗根系生长及H+-ATP酶和H+-焦磷酸酶活性的影响

被引：19

作者：

汪天

李娟

郭世荣

高洪波

王素平

机构：

[1] 南京农业大学园艺学院

来源：

植物生理与分子生物学学报 | 2005年 / 06期

关键词：

多胺; 低氧; H+-ATP酶; H+-焦磷酸酶; 黄瓜幼苗;

D O I：

暂无

中图分类号：

S642.2 [黄瓜];

学科分类号：

090202 ;

摘要：

采用营养液水培方式,研究了根际低氧胁迫下外源多胺对黄瓜幼苗植株根系生长,内源多胺含量与质膜H+-ATP酶、液泡膜H+-ATP酶和焦磷酸酶活性的影响。结果表明,根际低氧胁迫显著抑制黄瓜幼苗根系的生长,外源Put(腐胺)和Spd(亚精胺)可缓解低氧胁迫对根系的生长抑制,多胺主要以Spd的形式发挥促进性的生理作用,Put通过转化为Spd发挥作用;低氧胁迫下黄瓜根系内源多胺含量略有提高,外源多胺处理可增加内源多胺的含量;低氧胁迫下外源Put和Spd处理后质膜H+-ATP酶活性显著提高,外源多胺对黄瓜根系液胞膜H+-ATP酶和H+-焦磷酸酶活性没有明显影响,说明低氧胁迫下外源多胺主要通过提高质膜H+-ATP酶活性而发挥生理作用。

引用

页码：637 / 642

页数：6

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