Changes in photosynthesis and leaf characteristics with tree height in five dipterocarp species in a tropical rain forest
Changes in photosynthesis and leaf characteristics with tree height in five dipterocarp species in a tropical rain forest
复制标题
DOI：
10.1093/treephys/26.7.865
复制
发表时间：
2006-07-01
期刊：
影响因子：
4
通讯作者：
Koike, Takayoshi
中科院分区：
文献类型：
--
作者：
Kenzo, Tanaka;Ichie, Tomoaki;Koike, Takayoshi
在马来西亚热带雨林中，从幼苗到挺水树，研究了5种龙脑香属植物叶片光合、形态和生化特性随株高的变化。冠层开放度随树高的增加而显著增加。光合特性，如光饱和时的光合能力。光补偿点、最大羧化速率和最大光合电子传递速率。均随树高的增加而显著增加。叶片的形态和生化性状，如单位面积叶重、栅栏层厚度、单位面积氮浓度、单位干质量叶绿素浓度和叶绿素/氮比等也随树高的变化而显著。叶特性与树高有简单而显著的关系，种内和种间差异不大。因此，我们的研究结果表明，龙脑香树的光合能力取决于树高，树木适应光环境，通过调整其叶片形态和生化特性。这些结果应该有助于开发模型，可以准确地估计热带雨林的二氧化碳通量和生物量生产。
Variations in leaf photosynthetic, morphological and biochemical properties with increasing plant height from seedlings to emergent trees were investigated in five dipterocarp species in a Malaysian tropical rain forest. Canopy openness increased significantly with tree height. Photosynthetic properties, such as photosynthetic capacity at light saturation. light compensation point, maximum rate of carboxylation and maximum rate of photosynthetic electron transport. all increased significantly with tree height. Leaf morphological and biochemical traits, such as leaf mass per area, palisade layer thickness, nitrogen concentration per unit area, chlorophyll concentration per unit dry mass and chlorophyll to nitrogen ratio, also changed significantly with tree height. Leaf properties had simple and significant relationships with tree height, with few intra- and interspecies differences. Our results therefore suggest that the photosynthetic capacity of dipterocarp trees depends on tree height, and that the trees adapt to the light environment by adjusting their leaf morphological and biochemical properties. These results should aid in developing models that can accurately estimate carbon dioxide flux and biomass production in tropical rain forests.