Yoshie F
The Institute of Low Temperature Science, Hokkaido University, 060, Sapporo, Japan.
Oecologia. 1986 Sep;68(3):370-374. doi: 10.1007/BF01036741.
Photosynthesis and transpiration were measured simultaneously, under near-optimum and constant environmental conditions, in intact leaves of plants native to the temperate forest region. A linear relationship between photosynthetic rate and stomatal conductance was found in every species tested irrespective of leaf age or season, indicating that the calculated intercellular CO concentration and water-use efficiency were fairly constant within a species. The values of intercellular CO concentration and water-use efficiency ranged from 221 to 271 μl l [Formula: see text] and 4.46 to 8.20 μmol CO mmolHO (6.24±0.90 μmol CO mmolHO), respectively. The variations in intercellular CO concentration and water-use efficiency were not directly related to photosynthetic capacities, life-forms, or microhabitat preferences. The intercellular CO concentrations found in this study were close to values reported from cultivated plants and plants native to more arid regions, suggesting a common mechanism to maintain the stomatal conductance proportional to photosynthetic capacity over a wide variety of C plants.
在接近最佳且恒定的环境条件下，对温带森林地区原生植物的完整叶片同时进行了光合作用和蒸腾作用的测量。在所测试的每个物种中，无论叶龄或季节如何，都发现光合速率与气孔导度之间存在线性关系，这表明在一个物种内计算得出的细胞间二氧化碳浓度和水分利用效率相当恒定。细胞间二氧化碳浓度和水分利用效率的值分别在221至271微升/升[公式：见正文]和4.46至8.20微摩尔二氧化碳/毫摩尔水（6.24±0.90微摩尔二氧化碳/毫摩尔水）范围内。细胞间二氧化碳浓度和水分利用效率的变化与光合能力、生活型或微生境偏好没有直接关系。本研究中发现的细胞间二氧化碳浓度接近从栽培植物和原产于更干旱地区的植物中报告的值，这表明存在一种共同机制，可在多种C植物中维持气孔导度与光合能力成比例。
