@article{oai:nipr.repo.nii.ac.jp:00010065,
 author = {Sakata, Tsuyoshi and Kachi, Naoki and Yokoi, Yota and Sakata, Tsuyoshi and Kachi, Naoki and Yokoi, Yota},
 issue = {1},
 journal = {Polar science, Polar science},
 month = {Aug},
 note = {To evaluate the effects of low atmospheric pressure on leaf photosynthesis, we compared the photosynthesis of identical leaves of Fagus crenata at lowland (0 m a.s.l.) and at highland (2360 m a.s.l.). At the high altitude, the atmospheric pressure and partial pressure of CO_2 at intercellular air spaces in the leaf (C_<i360>) decreased to 77% and 78% of those at the low altitude, respectively. On the other hand, the efficiency of photosynthetic CO_2-utilization was apparently higher at the high altitude because of a mitigation of the O_2-inhibition of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) under low ambient partial pressure of O_2. This stimulation of photosynthesis partly compensated a photosynthetic depression due to the low C_<i360>, and the net assimilation rate (A_<n360>) at the high altitude retained 94% of the value at the low altitude. A theoretical model indicated that the stimulation of photosynthesis at high altitudes depend on internal conductance (g_i) and/or on Rubisco content. The model demonstrated that low atmospheric pressure at high altitudes caused severe restrictions of photosynthesis when leaves had a small g_i and/or a large amount of Rubisco, whichever are repeatedly reported in alpine plants., ブナの葉の光合成を標高0ｍと2360ｍの2地点で測定比較した結果、CO2分圧の低下は光合成の低下をもたらすが、O2分圧の低下は酸素によるRubisco活性の抑制を緩和する方向に働くことを示しています。},
 pages = {55--62},
 title = {Quantitative evaluation of the counterbalance between photosynthetic stimulation and depression caused by low partial pressure of O_2 and CO_ 2 in alpine atmospheres},
 volume = {1},
 year = {2007}
}