| 引用本文： |
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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. [点击复制]
- LI Wenjun,XU Xueqing,ZHOU Xuewen,Lü Shihong,BAI Kundong.Chemical Stoichiometry of Leaves from Plants with Different Growth Forms and Relationship with Phylogeny in the Huixian Karst Wetland of Guilin[J].Guangxi Sciences,2024,31(6):1112-1120. [点击复制]
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| 摘要: |
| 为了解喀斯特湿地植物的营养元素利用策略，本研究基于进化视角分析了植物遗传背景对植物叶片功能的影响。选取桂林会仙喀斯特湿地涵盖乔木、灌木、草本生长型的27种常见植物，针对其叶片碳(LC)、叶片氮(LN)、叶片磷(LP)、叶片钾(LK)、叶片钙(LCa)、叶片镁(LMg)及碳氮比(C∶N)、碳磷比(C∶P)、氮磷比(N∶P)进行分析，并探讨物种间的系统发育保守性。结果表明：不同生长型植物LMg含量与C∶N之间存在显著差异(P<0.05)。此外，植物叶片元素含量及C、N、P化学计量比之间存在显著相关性(P<0.05)，表明桂林会仙喀斯特湿地植物叶片元素之间存在强耦合机制。乔木、灌木植物叶片N∶P>14，草本植物叶片N∶P<14，表明桂林会仙喀斯特湿地乔木、灌木植物的生长主要受P限制，草本植物的生长主要受N限制。草本植物的叶片元素含量及C、N、P化学计量比,灌木植物的LC、LN、LP、LK含量及C、N、P化学计量比,乔木植物的LK、LCa含量及N∶P未表现出显著的系统发育保守性，说明相对于遗传背景，桂林会仙喀斯特湿地植物叶片元素含量及C、N、P化学计量比主要受环境变化的影响。研究结果可为植被建设与管理提供参考，为桂林会仙喀斯特湿地生态保育和生物多样性保护提供科学依据。 |
| 关键词: 叶片 生长型 生态化学计量 系统发育 喀斯特湿地 |
| DOI：10.13656/j.cnki.gxkx.20241207.005 |
| 投稿时间：2024-01-03修订日期：2024-02-23 |
| 基金项目:国家自然科学地区科学基金项目(31960241)资助。 |
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| Chemical Stoichiometry of Leaves from Plants with Different Growth Forms and Relationship with Phylogeny in the Huixian Karst Wetland of Guilin |
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LI Wenjun1, XU Xueqing1, ZHOU Xuewen1, Lü Shihong2, BAI Kundong1
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| (1.College of Life Sciences, Guangxi Normal University, Guilin, Guangxi, 541006, China;2.Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, Guangxi, 541006, China) |
| Abstract: |
| With the aim of understanding the nutrient utilization strategies of plants in karst wetlands,the impacts 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 phylogenetic 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 between 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 limited by N.No significant phylogenetic conservatism were showed in leaf element content and C,N,P stoichiometric 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 restoration and management and lay a scientific foundation for ecological conservation and biodiversity protection in the Huixian Karst Wetland of Guilin. |
| Key words: leaf growth form ecostoichiometry phylogeny karst wetlands |
