桂北岩溶区青冈栎-青檀群落植物叶片比叶面积研究  

Plant specific leaf areas of Cyclobalanopsis glauca-Pteroceltis tatarinowii community in karst region,northern Guangxi

作　　者：潘复静[1] 孙英杰[1] 张德楠[1] 曾丹娟[1] 徐广平[1] 黄玉清[1] 

机构地区：[1]广西壮族自治区中国科学院广西植物研究所,广西桂林541006

出　　处：《广西植物》2013年第3期295-299,共5页Guihaia

基　　金：国家自然科学基金(40872198;41172313);广西植物研究所基本业务费(桂植业11004);岩溶动力学重点实验室基金(KDL2011-09)

摘　　要：为揭示岩溶地区植物叶片比叶面积变化规律和叶片形态之间的相关关系,研究了桂北岩溶区青冈栎-青檀群落的叶片长/宽(LL/LW)、叶片厚度(LT)和比叶面积(SLA)及其之间的关系。结果表明:群落中常绿树种的LL/LW和LT显著高于落叶树种,而常绿树种的SLA显著低于落叶树种;乔木和灌木之间的LL/LW存在显著差异,但SLA和LT不存在显著差异。总体上看,SLA与LL/LW、LT之间是显著负相关关系,SLA随着LL/LW、LT的变大而逐渐减小。但LT与SLA负相关趋势比LL/LW与SLA的明显。因此,LT比LL/LW对叶片SLA的影响大,其明显影响了叶片的SLA。SLA的大小是衡量叶片获取光照能力的指标,因此岩溶区植物较厚的叶片对光照的获取能力具有较大的影响,并可导致光合作用效率的降低。In order to reveal the variable character of plant specific leaf areas and its correlation with leaf shape in karst region,the ratio of leaf length to leaf width（LL/LW）,leaf thickness（LT）and specific leaf area（SLA）and its relationship of the leaves of Cyclobalanopsis glauca—Pteroceltis tatarinowii community in northern Guangxi were investigated.The results showed that the LL/LT and LT of evergreen species were significantly higher than that of the deciduous trees,SLA of evergreen species was significantly lower than that of the deciduous trees.And LL/LW was significantly different between the arbors and shrubs,while SLA and LT were not significantly different.While,the coefficient of correlation between LT and SLA was larger than that of between LL/LW and SLA,and LT had larger impact on SLA than LL/LW.Furthermore,LT significantly affected SLA in this study.Previous researches showed that the index of SLA was the indicator measuring the ability of capturing the sun＇s energy for leaves.The thicker leaves were,the larger impacted on ability of obtaining sunlight.Therefore,it would lead to reduce the efficiency of photosynthesis.

关 键 词：岩溶 生活型 群落 比叶面积 叶片厚度 

分 类 号：Q949[生物学—植物学]