云杉属树种水分运输关键功能性状适应性进化研究

Currently, the adaptive evolution of some key water transport traits of woody plants is one of the cutting-edge issues in the ecophysiological research of woody plants. Picea species (Picea: about 34 speices in the world) are the dominant forest tree species in China and even the Northern Hemisphere with significant phenotypic variation and clear phylogenetic history, which widely distributed in the cold temperate zone and the alpine regions of temperate zone. Herein, Picea species is the ideal materials to study the adaptive evolution of some key functional traits of plant water transport. This project will rely on the applicant has established spruce common garden (total of 34 kinds, more than 250 kinds of sources) in three different geographic regions, systematically analyse the relationships of environmental plasticity, genetic variation and phylogenetic history of some key water transport traits in Picea species, such as xylem anatomical features, hydraulic conductivity, and the ability of anti-embolism, explore the adaptive evolutionary mechanism of the key features of plant water transport, and effectively screen the suitable spruce species for growing in Chinese arid and alpine regions.So, these results will provide a certain scientific basis and practical support for the protection and utilization of the important spruce resources in the Northern Hemisphere, especially for Chinese cold and arid regions, as well as for the recovery of the spruce forest and the screening of suitable spruce spreces in the major national forestry ecological engineering.

树木水分运输关键性状间关联及适应性进化是近年来树木生理生态研究的热点和前沿问题之一。云杉属物种(Picea:约34种)是广布于我国乃至北半球寒温带、温带中高山地区的主要森林树种，且分布生境差异大、表型变异显著，更重要的是系统发育关系清晰，因而是研究植物水分运输关键功能性状适应性进化的理想材料。本项目将依托申请者已建立的3个不同地理区域云杉同质园(Common Garden：共收集34种，250余种源)，系统比较云杉属全部物种水分运输关键功能性状(木质部解剖特征、导水率、抗栓塞化能力等)环境可塑性、遗传变异及系统发育历史间关联，进而全面理解云杉属植物水分运输关键功能性状适应性进化机制，并筛选适于干旱、高寒地区生长的优良云杉树种，为北半球特别是我国寒区旱区具有重要生态价值的云杉资源保护与利用以及该区国家重大林业生态恢复工程中优质高抗云杉树种的筛选提供一定的科学依据和实践支撑。

树木水分运输关键性状间关联及适应性进化是近年来树木生理生态研究的热点和前沿问题之一。云杉属物种是广布于我国乃至北半球寒温带、温带中高山地区的主要森林树种，且分布生境差异大、表型变异显著，更重要的是系统发育关系清晰，因而是研究植物水分运输关键功能性状适应性进化的理想材料。本项目依托已建立的3个不同气候区云杉同质园，系统比较了云杉属物种水分运输关键功能性状环境可塑性、遗传变异及系统发育历史间关联，进而揭示了云杉属植物水分运输关键功能性状适应性进化机制，并筛选出适于干旱、高寒地区生长的青海云杉等优良云杉树种。在国内外学术期刊上已发表论文3篇，其中SCI期刊 2篇，国内核心期刊1篇，获批专利2项，培养研究生3名。以上成果为我国寒区旱区云杉资源保护与利用提供了重要的科学依据和实践支撑。