Study of physiological integration of dwarfbamboo by using stable isotope (ィイD115ィエD1N)

本研究表明，矮竹单株内的水平根系（根茎）可在分株间进行资源运输。这是首次发现矮竹克隆整合的研究。在试验1中，当分株在开放和遮荫条件下通过根茎连接时，遮荫条件下分株的质量没有减少，而在分株切断时遮荫条件下分株的质量明显减少。结果表明，克隆整合增强了资源有限条件下品种的持久性。实验2利用稳定同位素（15N）研究了棕榈叶的资源转运。资源异质性（如光、养分）条件下的资源运输程度大于均匀条件下的资源运输程度。

This study showed that resource transportation was occurred between ramets by using horizontal root system (rhizome) within an individual of dwarf bamboo, Sasa palmata. This is the first study revealed the clonal-integration in dwarf bamboo.In the experiment 1, when ramets were connected by rhizome between open and shaded conditions, the mass of the ramets in shaded conditions were not reduced, while ramets mass was strongly reduced by the shaded conditions when the ramets wee severed. This results suggested the clonal integration enhance the persistence of the ramets in resource-limited conditions.In the experiments 2, resource transportation between ramets was observed by using stable isotope (15N) in Sasa palmata. And the extent of resource transportation was greater when the ramets were under heterogenous resource (e.g. light, nutrient) conditions compared with under homogenous conditions.