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

本研究取得了以下三个方面的成果：1）对生理生化研究中常用的叶片性状指标“SLW”进行了理论分析。提出了“肋部指数”、“比叶肉部重量”、“比细胞体积”、“叶肉部干物质含量”和“叶肉部气室比”等6个基本参数在植物生理生态学研究中的应用，并说明了这些参数在桃叶珊瑚研究中的应用价值。本研究结果为“万年青和落叶林中桃叶珊瑚叶片组成比叶重（SLW）的若干参数及其季节变化”一文的撰写做了准备。2）在檀泽山扁柏丸山，对水青冈受害树和健康树叶片的形态特征和光合特性的季节动态进行了研究。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）为了解植物群落的生理生态结构，对暖温带次生林两个立地的树木叶片形态和生理特征进行了研究。本研究表明，用“叶厚”、“SLW”或“SPAD值”等指标可以了解植物群落的某些生理生态学特征。此外，从叶片电导率的数据，我们得到了一些模式的植物群落的生态生理多样性，这反映了一个社区作为一个整体的生态生理特征。这一结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.