河南农业大学学报2025，Vol.59Issue(2)：212-220,9.DOI:10.16445/j.cnki.1000-2340.20240528.001
兰考泡桐和鄂川泡桐幼苗叶、根功能性状对比研究
Comparative study on leaf,root functional traits of Paulownia elongata and Paulownia albiphloea seedlings
摘要
Abstract
[Objective]To investigate the coordinated changes of root-leaf functional traits between two species of Paulownia elongata and Paulownia albiphloea,which have obvious difference in leaf size.[Method]Potted seedlings of P.elongata and P.albiphloea were studied.A series of traits in the leaves and fine roots of both that reflect the"quantity"and"activity"of their resource absorption func-tions,as well as leaf size and leaf hydraulic traits,were measured.Differences in leaf and fine root traits between these two Paulownia species were analyzed.[Result]The maximum,average,and total leaf areas of P.albiphloea were all significantly larger than those of P.elongata;Specific leaf area and leaf biomass and leaf tissue density of P.albiphloea were all significantly higher than those of P.elon-gata,leaf tissue density of P.albiphloea was significantly lower than that of P.elongata;And no sig-nificant difference was observed in leaf nitrogen mass fraction between the two species;Specific root length,fine root biomass,total root length,and nitrogen mass fraction density of P.albiphloea were all significantly higher than those of P.elongata,fine root tissue density was significantly lower than that of P.elongate;Vein density and stomatal density of P.albiphloea were both lower than those of P.elongata.[Conclusion]P.elongata and P.albiphloea employ opposite resource acquisition strate-gies:P.elongata tends to use a resource conservation strategy(slow strategy)whereas P.albiphloea uses a resource acquisition stra-tegy(fast strategy).P.albiphloea,with large and thin leaves,was higher in leaf"quantity"and"activity"than that of P.elongata,which has small and thick leaves.The"quantity"and"activity"of fine roots in both two kinds of Paulownia had similar trends,indicat-ing a coordinated variation between roots and leaves of the two Paulownia species.关键词
泡桐/叶片大小/叶经济学性状/叶水力学性状/细根/协同变化Key words
Paulownia/leaf size/leaf economics traits/leaf hydraulics traits/fine roots/coordi-nated variation分类
林学引用本文复制引用
李湘,刘新宇,郭冰林,孔德良,赵振利..兰考泡桐和鄂川泡桐幼苗叶、根功能性状对比研究[J].河南农业大学学报,2025,59(2):212-220,9.基金项目
国家自然科学基金项目(32171746) （32171746）
河南省特色骨干林学学科群建设经费项目(30500854) （30500854）
河南省留学人员科研择优资助经费项目(30602423) （30602423）
