| 沈玉芳,曲东,王保莉.磷对大麦根系导水率的调节作用研究[J].干旱地区农业研究,2005,(1):81~84 |
| 磷对大麦根系导水率的调节作用研究 |
| Effects and regulation of phosphorus on root hydraulic conductance in barley |
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| DOI：10.7606/j.issn.1000-7601.2005.01.15 |
| 中文关键词: 磷营养 干旱胁迫 根系导水率(Lpr) |
| 英文关键词:phosphorus nutrient drought stress root hydraulic conductance (Lpr) |
| 基金项目:国家重点基础研究发展规划课题(G2000018605)； 国家自然科学基金(40171063、40371076)； 国家自然科学基金重大研究计划(90102012) |
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| 中文摘要: |
| 在控制土壤磷素供应水平及控制灌水量的盆栽试验中,采用静态压力室法测定了三叶期大麦根系导水率(Lpr)的变化。结果表明:无磷处理植株的导水率(Lpr)远远低于有磷植株,即使在正常供水条件下,仅为有磷处理植株的近19%,表明磷营养可以调节大麦幼苗细胞到细胞途径水通道蛋白(AQP)的表达量。无磷处理随干旱程度加重,其导水率下降较有磷处理更为剧烈,旱后复水过程中,导水率恢复能力也显著低于有磷处理,表明磷营养对增强大麦对干旱胁迫的适应性及提高恢复能力具有非常重要的作用。 |
| 英文摘要: |
| At different phosphorus levels, pot experiments, in different irrigations (normal water supply, medium drought stress, drought stress), were carried out to determine the varieties of root hydraulic conductance (Lpr) of barley in a pressure chamber. The result showed that under different water conditions, the Lpr of non-phosphorus treatment was always strongly lower than that of P-treatment seedlings, and even under the condition of normal water supply the former was only 19% of the latter. It indicated that P could regulate the amount of AQP. Lpr of non-phosphorus treatment decreased more sharply with the intensifying of drought, and the recovering ability was significantly weaker than that of P-treatment seedlings during the course of irrigation, and it indicated that phosphorus played a very important role in improving the adaptability to drought and recovering ability of barley. |
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