24-表油菜素内酯对低氧胁迫下黄瓜幼苗碳水化合物代谢的影响

被引：36

作者：

康云艳 ^{[1
,2
]}

杨暹 ^{[2
]}

郭世荣 ^{[1
]}

张营营 ^{[2
]}

机构：

[1] 南京农业大学园艺学院/农业部南方蔬菜遗传改良重点开放实验室

[2] 华南农业大学园艺学院

来源：

中国农业科学 | 2011年 / 12期

关键词：

黄瓜; 24-表油菜素内酯; 低氧胁迫; 碳水化合物; 糖酵解;

D O I：

暂无

中图分类号：

S642.2 [黄瓜];

学科分类号：

090202 ;

摘要：

【目的】探讨外源EBR(24-表油菜素内酯)对低氧胁迫下黄瓜(Cucumis sativus L.)幼苗碳水化合物代谢的影响。【方法】采用营养液水培法,以耐低氧能力较强的黄瓜品种‘绿霸春4号’和耐低氧能力较弱的品种‘中农8号’为材料,研究根际低氧胁迫下外源施用EBR对黄瓜幼苗碳水化合物含量及根系糖酵解代谢酶活性的影响。【结果】通气条件下正常栽培,EBR处理显著促进两黄瓜品种叶片和根系中可溶性总糖的积累,但对根系糖酵解代谢酶活性的影响较小;低氧胁迫下,耐低氧能力不同的两品种幼苗根系淀粉、葡萄糖含量及酸性转化酶、ATP依赖的磷酸果糖激酶活性的变化表现出明显的品种差异;低氧条件下,EBR处理进一步提高了两品种根系中蔗糖和果糖含量及主要的糖酵解代谢酶活性,对叶片中大部分碳水化合物含量均无显著影响。【结论】低氧胁迫下,外源EBR通过促进碳水化合物从叶片向根系的分配及根系糖酵解代谢酶活性的提高,增强黄瓜植株耐低氧胁迫的能力。

引用

页码：2495 / 2503

页数：9

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