广西科学2024，Vol.31Issue(6)：1112-1120,9.DOI:10.13656/j.cnki.gxkx.20241207.005
桂林会仙喀斯特湿地不同生长型植物叶片化学计量及其与系统发育的关系
Chemical Stoichiometry of Leaves from Plants with Different Growth Forms and Relationship with Phylogeny in the Huixian Karst Wetland of Guilin
摘要
Abstract
With the aim of understanding the nutrient utilization strategies of plants in karst wetlands,the im-pacts of plant genetic background on leaf functions were analyzed from an perspective of evolution.A total of 27 common plant species covering the growth forms of tree,shrub,and herb in the Huixian Karst Wetland of Guilin were selected for the analysis.The leaf carbon(LC),leaf nitrogen(LN),leaf phosphorus(LP),leaf potassium(LK),leaf calcium(LCa),leaf magnesium(LMg),carbon-to-nitrogen ratio(C∶N),carbon-to-phosphorus ratio(C∶P),and nitrogen-to-phosphorus ratio(N∶P)were measured and calculated.The phy-logenetic conservatism among species was explored.The results indicated that there were differences(P＜0.05)in LMg and C∶N ratio among different growth forms of plants.Correlations(P＜0.05)existed be-tween the content of leaf elements and the stoichiometric ratios of C,N,and P,indicating a strong coupling mechanism between leaf elements in the Huixian Karst Wetland of Guilin.The leaves of trees and shrubs showed N∶P＞14,while the leaves of herbs showed N∶P＜14,indicating that the growth of trees and shrubs in the Huixian Karst Wetland of Guilin was mainly limited by P,while that of herbs was mainly limit-ed by N.No significant phylogenetic conservatism were showed in leaf element content and C,N,P stoichio-metric ratios fo herbs,the LC,LN,LP,LK and C,N,P stoichiometric ratios fo shrubs,and the LK,LCa,N∶P ratio of trees,indicating that leaf element content and C,N,P stoichiometric ratios were mainly influenced by environmental changes rather than genetic background.The results provide reference for vegetation resto-ration and management and lay a scientific foundation for ecological conservation and biodiversity protection in the Huixian Karst Wetland of Guilin.关键词
叶片/生长型/生态化学计量/系统发育/喀斯特湿地Key words
leaf/growth form/ecostoichiometry/phylogeny/karst wetlands分类
农业科技引用本文复制引用
李文君,许雪晴,周雪雯,吕仕洪,白坤栋..桂林会仙喀斯特湿地不同生长型植物叶片化学计量及其与系统发育的关系[J].广西科学,2024,31(6):1112-1120,9.基金项目
国家自然科学地区科学基金项目(31960241)资助. （31960241）
