土壤有效磷匮乏对植物生长的限制是全球关注的热点问题。我国亚热带地区普遍存在的低磷环境对毛竹生长的影响以及毛竹低磷适应机制尚不十分清楚，土壤微生物介导毛竹磷素利用的生理生态学机理知之更为匮乏。本项目拟以毛竹幼苗为研究试材，通过多梯度磷胁迫和土壤微生物环境模拟交互试验，研究毛竹苗期对低磷环境的适应机理，包括：1）形态表现及生理适应机制；2）分子生物学调控机理；3）微生物协同效应。在此基础上发掘毛竹苗木自身磷高效利用潜力，筛选分离磷利用关键功能微生物种群。预期成果将丰富植物磷营养的生理学和分子生物学知识体系，为磷高效林木品种的培育和高效磷利用技术手段的开发应用提供科学依据和技术基础。

Phosphate (Pi) deficiency in soils is a key factor that limits plant development. A substantial body of studies have thoroughly investigated the responses of plant to deficient soil Pi on crops and a few model plant species. However, there is still a lack of understanding on how moso bamboo (Phyllostachys edulis Carr.), native to the subtropical China where the soils are subjected to heavy Pi deficiency in soil, responded and/or get coupled with low Pi in soils. Furthermore, more information is needed on how soil microorganism activities in combination with plant physiological and biochemical courses affects the process of P utilization in this region. In the current study, moso bamboo seedlings were used to estimate their responses to the interactions between P deficiency and microorganism condition. We intended to clarify the underlying mechanism via assessing differences in seedling morphological and physiological attributes, molecular biology foundation and gene expression and the synergies of microbial combination communities. Concomitantly, we expected to explore the possibilities for moso bamboo seedlings to utilize P more efficiently, as well as to screen and isolate functional microbial populations for phosphorus utilization. The study would improve the understanding on tree plant physiology and molecular biology processes related to P efficiency, and would also be valuable to cultivate varieties of P effective and increase efficiency of P fertilizer application in bamboo seedling production.