Subalpine coniferous species are distributed over a wide range of elevations in which they must contend with stressful conditions, such as high elevations and extended periods of darkness. Two evergreen coniferous species, Abies veitchii and Abies mariesii, dominate at low and high elevations, respectively, in the subalpine zone, central Japan. The aim of this study is to examine the effects of leaf age, elevation and light conditions on photosynthetic rates through changes in morphological and physiological leaf traits in the two species.

中文翻译：

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叶龄，海拔和光照条件对两个常绿针叶树冷杉（Abies veitchii）和滨海曲霉（A. mariesii）幼树的光合作用及叶片性状的影响

亚高山针叶树种分布在很宽的海拔范围内，在这些海拔范围内它们必须应对压力条件，例如高海拔和长时间的黑暗。在日本中部亚高山带，两个常绿针叶树种冷杉冷杉和冷杉冷杉分别在低海拔和高海拔地区占优势。这项研究的目的是通过改变两个物种的形态和生理叶片性状来研究叶片年龄，海拔和光照条件对光合速率的影响。