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利用Li-6400便携式光合分析系统测定了干旱胁迫下杨树无性系品种小青杨、107、W13净光合、蒸腾速率的影响及光合、蒸腾作用日进程曲线。结果表明:外界因素只是渗透调节作用对光合、蒸腾速率影响因子之一,而细胞内的渗透调节物质起了关键性的作用。光合、蒸腾作用日进程曲线表明光合、蒸腾与环境因子及内部因子之间有密切关系。
Li-6400 portable photosynthesis system was used to measure the net photosynthesis and transpiration rate of poplar clones Populus tomentosa, 107 and W13 under drought stress and the daily process curve of photosynthesis and transpiration. The results showed that external factors were only one of the influencing factors of photosynthesis and transpiration rate of osmotic adjustment, while intracellular osmotic adjustment substances played a key role. Photosynthetic, transpiration daily process curve shows that photosynthesis, transpiration and environmental factors and internal factors are closely related.