Du Hongmei, Wang Deli, Sun Wei
Key Laboratory for Vegetation Ecology, Education Ministry, Institute of Grassland Science, Northeast Normal University, Changchun 130024.
Ying Yong Sheng Tai Xue Bao. 2002 Dec;13(12):1600-4.
The diurnal changes in photosynthesis and transpiration of Kelimeris integrifolia in Summer and Autumn on Songnen grasslands were characterized as a two-peak curve, but with some differences between two seasons. It was shown that environmental conditions and plant internal factors had a strong effects on plant photosynthesis and transpiration. The net photosynthetic and transpiration rates of the leaves were positively correlated to photosynthetically active radiation (P < 0.01), and negatively correlated to stomatal resistance as well as intercellular CO2 concentration (P < 0.05). The transpiration rate was positively correlated to leaf temperature and water saturation deficit of the air. Among the above factors, photosynthesis active radiation was the dominant factor, and stomatal resistance also played an important role in plant photosynthesis and transpiration.
松嫩草原上兴安一枝香在夏秋季节光合作用和蒸腾作用的日变化呈双峰曲线，但两季之间存在一些差异。结果表明，环境条件和植物内部因素对植物光合作用和蒸腾作用有强烈影响。叶片的净光合速率和蒸腾速率与光合有效辐射呈正相关（P<0.01），与气孔阻力以及胞间CO2浓度呈负相关（P<0.05）。蒸腾速率与叶片温度和空气水汽饱和差呈正相关。在上述因素中，光合有效辐射是主导因素，气孔阻力在植物光合作用和蒸腾作用中也起重要作用。
