An eco-physiological study of warm-temperate-forests on some leaf traits

1)从理论上分析了生理生物学研究中常用的一个重要的叶片性状指标“SLW”。提出了“肋部指数”、“比叶肉部分重”、“比细胞体积”、“叶肉部分干物质含量”和“叶肉部分气隙比”等6个基本参数在植物生理生态研究中的应用，并说明了这些参数在植物生理生态研究中的作用。2)在坦泽山的Hinokiboramaru山区，研究了常绿落叶林中受害和健树的叶片形态特征和光合作用特性的季节动态。我们从这些数据中研究了叶片性状的稳定性和不稳定性。3)为了了解植物群落的生态生理结构，对暖温带次生林林地两个立地的树木叶片形态和生理特性进行了研究。这项研究表明，我们或许能够用“叶厚”、“SLW”或“SPAD值”来了解植物群落的某些生态生理方面。此外，从叶片电导数据中，我们得到了植物群落的生态生理多样性格局，揭示了群落整体的生态生理特征。这一成果的主要部分发表在该项目的报告中。

We obtained following three results in this project.1) We theoretically analyzed "SLW", an important index of leaf trait used often in studies of physiological rcology. We suggested the six essential parameters, "Rib-part index", "Specific Mesophyll-part Weight", "Specific Cell Volume", "Dry-matter Content of Mesophyll-part" and "Air-space Ratio of Mesophyll-part" should be useful for studies of physiological ecology of plants, and showed the usefulness of these parameters in the study of Aucuba japonica. This result is prepared for a manuscript, which title will be "Some leaf parameters composing specific leaf weight (SLW) and their seasonal changes in Aucuba japonica growing in evergreen and deciduous forests"2) The seasonal dynamics of morphological traits and photosynthetic characteristics of leaves of damaged and sound trees of Fagus crenata were investigateed at Mt.Hinokiboramaru in Tanzawa mountains. We studied stability and instability of leaf traits from this data. A part of this result was published in Japanese.3) As an attempt to understand eco-physiological structures of a plant community, morphological and physiological leaf traits of trees on two site of forest floor of a warm-temperate secondary forest were investigated. The study suggrsted that we might-be able to undetstand some eco-physiological aspects of plant communities with "leaf thickess", "SLW" or "SPAD value". Furthermore, from the data of leaf conductance, we obtained some patterns of eco-physiological diversity of plant communities, which suggested an eco-physiological characteristic of a community as a whole. The main part of this result was published in the report of this project.