论文部分内容阅读
与根际温度为23℃下生长的小麦相比,根际温度为3℃条件下生长的小麦地上部分及根系干物质重量明显下降,叶面积亦大大减小.上述下降倾向与较低的CO_2同化率有关,而较低的同化率则与叶片传导力及叶片的CO_2浓度较低有关,同时也与较高的负水势有关.较低的CO_2同化率亦与植株内高淀粉含量和可溶性全糖含量有关,与较低的光合产物运转量及较小的库容有关.叶绿素含量不受根际温度变化的影响,根际温度为3℃的小麦的水分利用率是根际温度为23℃的1.5倍.
Compared with wheat grown at rhizosphere temperature of 23 ℃, the shoots and root dry weight of wheat grown under rhizosphere temperature of 3 ℃ significantly decreased, and the leaf area decreased significantly.The above tendency of declining tendency was similar to that of lower CO_2 While the lower assimilation rate was related to the leaf conductivity and leaf CO 2 concentration, and also the higher negative water potential.The lower CO 2 assimilation rate was also related to the high starch content and soluble content Sugar content and lower photosynthetic product run volume and smaller storage capacity.The content of chlorophyll was not affected by the change of rhizosphere temperature.The water use efficiency of wheat with rhizosphere temperature 3 ℃ was the rhizosphere temperature 23 ℃ 1.5 times.