摘要
叶片功能性状的变异及性状间的耦合关系反映植物对环境变化的协调或权衡.为探讨原生性喀斯特森林植物叶片功能性状特征,以茂兰喀斯特森林不同生长型(乔木、灌木、草本)的优势种植物为研究对象,通过测定叶片的叶面积(LA)、比叶面积(SLA)、叶绿素含量(Chl)、叶干物质含量(LDMC)、叶厚度(LT)、叶氮含量(LNC)、叶碳含量(LCC)7项叶片功能性状指标,分析叶片的变异特征及其相关性,比较不同生长型植物叶片的差异.结果表明:(1)叶片功能性状整体变异范围较大,为9.7%-87.4%,叶片结构性状的整体变异程度高于叶片化学性状;不同生长型植物叶性状存在种间差异,灌木种间变异大于乔木和草本.(2)叶片功能性状间具有普遍的相关性,SLA与LDMC、Chl均呈极显著负相关,与LNC呈显著正相关;LT与Chl呈极显著正相关,与LNC呈显著负相关.(3)不同生长型植物叶片功能性状差异显著,乔木和灌木的LA、LT和LCC显著高于草本植物,SLA和LNC反之;灌木的Chl和LDMC显著高于乔木和草本植物.本研究表明茂兰喀斯特森林不同生长型优势种植物表现出LA、SLA、Chl较大而LT、LDMC较低的性状特征,以适应原生性较强的喀斯特环境.
The variation in functional leaf traits and the coupling relationships of these traits reflect the coordination or trade-offs of plants in response to environmental changes.To explore the functional leaf traits of native karst forest plants,the dominant species of different plant types(trees,shrubs,and herbs)in the Maolan Nature Reserve were selected as study objects.The leaf area(LA),specific leaf area(SLA),chlorophyll content(Chl),leaf dry matter content(LDMC),leaf thickness(LT),leaf nitrogen content(LNC),and leaf carbon content(LCC),as well as the variations in these characteristics and their correlation,were analyzed.The differences in the leaves of the different plants were compared.The results showed the following:(1)The overall range of the variation in the functional leaf traits was large(9.7%-87.4%).The variation in structural leaf traits was larger than that in chemical leaf traits.Interspecific differences were found in the leaf traits of the different plant types,and the interspecific variation in shrubs was larger than that in trees and herbs.(2)A general correlation was found among functional leaf traits:SLA negatively correlated with LDMC and Chl and positively correlated with LNC;LT significantly positively correlated with Chl and negatively correlated with LNC.(3)Significant differences were identified in the functional leaf traits among different plant types:the LA,LT,and LCC of trees and shrubs were significantly higher than those of herbaceous plants,whereas SLA and LNC showed the opposite trend.The Chl and LDMC of shrubs were significantly higher than those of trees and herbs.In conclusion,the dominant species of different plant types in the Maolan karst forest showed higher LA,SLA,and Chl but lower LT and LDMC,enabling them to adapt to the more primitive karst environment.
作者
吴陶红
龙翠玲
熊玲
刘奇
WU Taohong;LONG Cuiling;XIONG Ling;LIU Qi(College of Geography and Environmental Sciences,Guizhou Normal University,Guiyang 550025,China)
出处
《应用与环境生物学报》
CAS
CSCD
北大核心
2023年第5期1043-1049,共7页
Chinese Journal of Applied and Environmental Biology
基金
国家自然科学基金项目(31660107)
贵州省科技计划项目(黔科合平台人才[2017]5726-45号)资助
关键词
叶功能性状
变异及关联
性状组合
茂兰
leaf functional trait
variation and association
trait combination
Maolan
