基于同质园实验的两种典型荒漠植物叶片功能性状变异研究

植物叶功能性状的变异及影响因素对了解植物利用资源和适应环境具有重要意义.本研究以同质园中不同地理种源白刺(Nitraria tangutorum)和红砂(Reaumuria soongorica)为研究对象,测定叶片形态性状和化学计量指标,并对其进行单因素方差分析、相关性分析和冗余分析.结果表明:同质园中各地理种源白刺...

Variation in Plant Functional Traits of Two Typical Desert Plant Based on Common Garden Experiment

The variation and influencing factors of plants leaf functional traits were of great significance for understanding utilization of plant resources and environment adaptation. In this study,Nitraria tangutorum and Reaumuria soongarica from different geographical provenances in the common garden were used as the research objects,the morphological traits and stoichiometric indexes of leaves were measured,and analyzed by the single factor analysis of variance,correlation analysis,and redundancy analysis. The results showed:There were significant differences in the degree of fleshiness,water content,tissue density,nitrogen content,nitrogen and phosphorus ratio of N. tangutorum leaves from different geographical provenances in the common garden (P<0.05),which suggested that the interspecific differences in leaf functional traits might be related to genetic differentiation;The specific leaf area and tissue density of N. tangutorum and R. soongarica were significantly negative correlated (P<0.01),nitrogen content and nitrogen and phosphorus ratio were significantly positive correlated (P<0.05),while the carbon and nitrogen ratio and nitrogen and phosphorus ratio of R. soongarica leaves were significantly positive correlated (P<0.01),indicating that the two plants had different adaptation strategies to the environment,and the leaves of R. soongarica had higher carbon assimilation capability;The degree of fleshiness,water content,tissue density of N. tangutorum leaves and the specific leaf area and phosphorus content of R. soongarica leaves were significantly affected by altitude (P<0.05),indicating that altitude was the dominant environmental factor affecting the growth of the two plants.