高温条件下CO2对黄瓜叶片光合速率和气孔特性的影响

探索高温条件下,施加CO₂对黄瓜叶片的光合速率、气孔长度、气孔宽度、气孔密度、气孔开张比和气孔开度的影响。采用LI-6400测定光合速率,结果显示高温条件下,经CO₂处理的14、21、28、35和42d的黄瓜叶片光合速率显著增加,分别比常温处理增加30.8%、49.7%、34.5%、32.1%和32.1%。利用软件Motic Images Advanced 2.0分析表明,高温结合CO₂处理后黄瓜气孔长度、宽度、密度、开张比和开度均显著增加,在处理35、28、42、14和28d时分别比常温处理增加了36.4%、38.8%、37.7%、30.2%和36.9%。

Effects of CO_2 on Cucumber Leaf Photosynthetic Rate and Stomatal Characters under High Temperature

The effects of CO₂ on leaf photosynthetic rate, stomatal length and width, stomatal density, stomatal opening ratio and stomatal aperture under high temperature were studied in cucumber. LI-6400 was used to test cucumber photosynthetic rate. The result showed that compared with room temperature, cucumber photosynthetic rate was increased significantly to 30.8%, 49.7%, 34.5%, 32.1% and 32.1% respectively, at 14, 21, 28, 35 and 42 days by treating with high temperature and CO₂. By Motic Images Advanced 2.0, cucumber stomatal length and width, stomatal density, stomatal opening ratio and stomatal aperture were all increased significantly by treating with CO₂ and high temperature. Compared with treatment of room temperature, they were increased by 36.4%, 38.8%, 37.7%, 30.2% and 36.9% at 35, 28, 42, 14 and 28 days, respectively.