北京周边山地苔草属和委陵菜属植物功能性状

Plant functional traits of Carex and Potentilla around Beijing mountainous areas

植物功能性状可有效反映植物代谢活动、生物化学组成以及养分吸收等特征。本研究通过分析北京周边山地苔草属和委陵菜属植物的功能性状数据,得出结论如下:(1)植株高度、叶长度、叶宽度、花长度、比叶面积和叶片氮、磷含量之间具有正相关的关系,叶厚度、叶干重与其他性状呈负相关。(2)系统进化因素是导致植株高度、叶长度和叶片总氮含量产生差异性的内在因素。(3)随着海拔升高,植株变矮小,花朵变小,叶片变窄,比叶面积更小,叶片总氮、总磷也变少,叶片变得更厚更重。综合来看,海拔和系统进化对苔草属和委陵菜属功能性状的影响基本相同,只有比叶面积与系统进化的关系在两属中出现差异。

Plant functional traits can effectively reflect the plant metabolism activities, biochemical components, and nutritional absorption. This paper analyzed the plant functional traits of Carex and Potentilla around Beijing mountainous areas, and the results showed that the plant height, leaf length, leaf width, flower length, specific leaf area （SLA）, and leaf total nitrogen （TN） and total phosphorus （TP） contents had positive correlations with each other, and the leaf thickness and leaf weight had negative correlations with the other traits. Phylogenetic information affected the plant height, leaf length, and leaf TN content. With the increase of altitude, the plant height, leaf length, leaf width, flower length, SLA, and leaf TN and TP contents decreased, while the leaf thickness and leaf weight increased. Altitude and phylogenetic information had the same effects on the functional traits of Carex and Potentilla, only the relationships between SLA and phylogenetic information had differences.