Tradeoff and diversity of leaf/shoot traits among plant life forms in nonseasonal environment

热带山区为植物提供了理想的环境，没有热和干燥的压力，在那里我们观察到广泛的变化内和跨生活型多样性的植物。本研究的目的是研究叶和茎功能的生理生态分化，基于这样的模块水平的权衡加速分化在这样的环境中的假设。在西爪哇的哈利门国家公园和日本南部屋久岛的暖温带雨林中设置了主调查点，对110种植物进行了为期3年的叶统计调查。将叶片样品分为细胞壁和原生质组分，检验细胞壁蛋白质随叶片寿命增加而增加的假说，这违背了叶片寿命与氮含量负相关的简单解释。对大型附生蕨类植物、棕榈攀缘植物等几种特有的生活型进行了详细的生长和异速生长分析。研究了新叶冲洗过程中的水势变化、树冠内茎-梢分配模式的可塑性控制以及茎径向生长与地上部生长的分配调节。

Tropical mountains provide ideal environments for plants without thermal and desiccation stresses, and where we observe a wide variation of within-and across-life form diversity of plants. This study aimed to examine ecophysiological differentiation of leaf and shoot function, based on the hypothesis that such module-level tradeoffs accelerate the differentiation in such environment. Main site was set at Mount Halimun National Park in West Java, and a comparative site at warm-temperate rain forests in Yakushima Island, southern Japan.In Mount Halimun, three-year census of leaf demography for 110 species was carried out. Leaf samples were divided into cell-wall and protoplasm components, to test the hypothesis that cell-wall protein increases with leaf longevity, which violates simple explanation of leaf-longevity vs. nitrogen content negative correlation. Several unique life forms such as large epiphytic fern and palm climbers were analyzed their growth and allometry in detail. Water potential change during new leaf flushing, plastic control of among-shoot allocation pattern within a plant crown, and allocation regulation between radial stem growth and shoot growth, were carried out.