| Cite this article: | 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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| DOI： |
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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 |
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