| 引用本文: | 付媛媛,司转运,高阳,等.水盐胁迫对超高产小麦根系导水率的影响[J].灌溉排水学报,0,():-. |
| FU Yuanyuan,sizhuanyun,gaoyang,et al.水盐胁迫对超高产小麦根系导水率的影响[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】为揭示水盐胁迫对超高产小麦根系导水率的影响机制。【方法】本文以超高产小麦品种“烟农1212”为研究对象，设置水分胁迫、盐分胁迫和水盐胁迫3种胁迫处理（2% PEG6000、0.1% NaCl和2% PEG6000+0.1% NaCl）和对照处理（Hoagland营养液），测定小麦的形态指标、根系导水率及全氮、K+和Na+含量，分析水盐胁迫下小麦根系导水率降低的影响因素。【结果】：（1）与对照相比，水分胁迫、盐分胁迫和水盐双重胁迫使烟农1212冬小麦的株高和叶面积显著降低了15%，25%，46%，47%，50%和79%，根系和叶片的相对含水量降低了18%，2%，8%，5%，2%和8%，并增加了其根直径与根系活力；（2）根冠比在水分胁迫及盐分胁迫条件下与对照相比增加了12%，14%，而在水盐双重胁迫条件下显著降低了6%；（3）与对照相比，盐分胁迫和水盐双重胁迫显著增加了烟农1212叶片和根系Na+/K+比，水分胁迫下虽也有增加，但差异不显著；（4）水分胁迫、盐分胁迫及水盐双重胁迫显著降低叶片的全氮含量；（5）烟农1212的根系总导水率与对照相比，水分、盐分及水盐双重胁迫使其显著降低了58%，51%和93%；【结论】逐步回归分析表明，烟农1212的叶面积与根系导水率呈显著正相关关系（R2=0.9774），是表征水盐胁迫下根系总导水率的关键指标。 |
| 关键词: 水盐胁迫；超高产小麦；K+含量；Na+含量；根系导水率 |
| DOI： |
| 分类号:S S3 |
| 基金项目:财政部和农业农村部国家现代农业产业技术体系项目（CARS-03-19）、国家自然科学基金项目（51879267）和兵团重大科技计划项目（2021AA003）资助 |
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| Effects of Water and Salt Stress on Root Hydraulic Conductivity of Super High Yield Wheat |
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FU Yuanyuan1, sizhuanyun2, gaoyang2, wangxingpeng3, wansumei3
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1.Tarim Univercity;2.Institute of farmland irrigation, Chinese Academy of Agricultural Sciences;3.Tarim University
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| Abstract: |
| 【Background】Drought and soil salinization were the great challenges faced by global agricultural production today. Crop responses to drought and salinity stress were not only involed with the efficient use of water resources, but also the safety of food production. Therefore, high water use efficiency in agricultural production is particularly important.【Objective】In order to reveal the influence of water and salt stress on root hydraulic conductivity of super high-yield wheat, the ‘Yannong 1212’ was chosen.【Method】The experiment were conducted in three stress treatments of water stress, salt stress and water plus salt stress (2% PEG6000, 0.1% NaCl and 2% PEG6000 + 0.1% NaCl) with one control treatment(Hoagland nutrient solution). The factors affecting the decrease of root hydraulic conductivity of wheat under water and salt stress were analyzed. 【Result】(1) Compared with the control treatment, water stress, salt stress and water plus salt stress treatments significantly reduced the plant height and leaf area of Yannong 1212 Winter Wheat by 15%, 25%, 46%, 47%, 50% and 79%, while the relative water content of roots and leaves decreased by 18%, 2%, 8%, 5%, 2% and 8%, and increased its root diameter and root activity; (2) Compared with the control treatment, the root-shoot ratio increased by 12% and 14% under water and salt stress treatments significantly decreased by 6%; (3) Compared with the control treatment, salt stress and water plus salt stress treatments significantly increased the Na +/K + ratio of leaves and roots, although it increased under water stress, the difference was not significant; (4) Water stress, salt stress and water plus salt stress significantly reduced the total nitrogen content of leaves; (5) The total root hydraulic conductivity of Yannong 1212 was significantly reduced by 58%, 51% and 93% under water, salt and water plus salt stress.【Conclusion】The results of this study shows that the leaf area of Yannong 1212 hsa a significant positive correlation with root hydraulic conductivity, which is the key index affecting the total root hydraulic conductivity. |
| Key words: Water and salt stress; Super high yield wheat; K+ content; Na+ content; Root hydraulic conductivity |
