但叶片水分利用效率均高于对照。
水分低水位管理蒸腾速率、上部干物重和叶片水分利用效率下降。
Leaf transpiration rate, above ground dry weight and water use efficiency were all decreased under the conditions of low water level.
结果表明，各品种幼苗叶片光合速率、蒸腾速率和气孔导度均随土壤水分的减少而呈降低趋势， 叶片水分利用效率呈增加趋势。
The results showed that photosynthetic rate, transpiration rate, and stomatal conductance decreased and leaf WUE increased with soil water content declined.
结果表明，分根交替灌溉可增强烟株的根系活力，保持较高的光合速率，降低蒸腾速率，提高叶片瞬时水分利用效率；
The results indicated that root-divided alternative irrigation could increase root activities, photosynthesis rate and water use efficiency of tobacco leaf, but decrease transpiration rate;
结果表明，野生一粒小麦在叶片维管束解剖结构、水分利用效率及光合速率对光、温和CO_2的反应方面类似于C_4植物。
The results indicated that the wilddiploid T. boeoticum was similar to C_4 plants in leaf anatomy and in the response to light, temperature, CO_2 concentration and water.
结果表明，野生一粒小麦在叶片维管束解剖结构、水分利用效率及光合速率对光、温和CO_2的反应方面类似于C_4植物。
The results indicated that the wilddiploid T. boeoticum was similar to C_4 plants in leaf anatomy and in the response to light, temperature, CO_2 concentration and water.
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