南亚热带不同演替阶段森林优势树种叶片构建成本与机械抗性的协同关系  

Coordination between Leaf Construction Cost and Mechanical Resistance of Dominant Woody Species in Subtropical Forests at Different Successional Stages

作　　者：韦伊 刘慧[1] 贺鹏程 刘小容 叶清[1] WEI Yi;LIU Hui;HE Pengcheng;LIU Xiaorong;YE Qing(Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystem,Guangdong Provincial Key Laboratory of Applied Botany,South ChinaBotanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院华南植物园,退化生态系统植被恢复与管理重点实验室,广东省应用植物学重点实验室,广州510650 [2]中国科学院大学,北京100049

出　　处：《热带亚热带植物学报》2022年第4期483-491,共9页Journal of Tropical and Subtropical Botany

基　　金：中国科学院战略性先导科技专项(XDA13020601);国家自然科学基金项目(32001106);中国博士后科学基金资助项目(2020M672861,2021T140676)资助。

摘　　要：为探究不同演替阶段森林优势种叶片资源获取策略的差异以及叶片构建成本与机械抗性的关系,对我国南亚热带不同演替阶段森林14优势种的叶片构建成本、机械抗性、角质层厚度和比叶重等结构性状进行测定。结果表明,与演替早期相比,演替晚期优势种具有更高的单位面积叶片构建成本、叶片撕裂力以及穿透力,但其叶片最大光合速率较低;同时,单位面积叶片构建成本与机械抗性呈显著正相关关系,而叶片角质层厚度、比叶重等结构性状也与叶片构建成本、机械抗性均呈显著正相关。因此,从叶片能量投资策略上反映了南亚热带森林演替进程中叶片构建成本与机械抗性的协同关系。In order to reveal the leaf energy investment strategy of subtropical forest trees at different successional stages and the correlations between leaf construction cost and mechanical resistance,the suits of leaf traits,including force to tear(F_(t)),force to punch(F_(p)),leaf mass per area(LMA),leaf lifespan(LLS),leaf construction cost per area(CC_(area)),leaf cuticle thickness(T_(c)),and leaf maximum photosynthesis per area(A_(area)),for 14 dominant woody species from subtropical forests at different successional stages were measured,and the correlations between leaf construction cost and mechanical resistance were analyzed.The results showed that the dominant species from late successional forest had higher CC_(area),Ft and Fp,but lower A_(area) than those in early successional forest.In addition,CC_(area) was positively correlated with both Ft and Fp.Moreover,the structural traits,such as Tc and LMA,were positively correlated with CC_(area) and mechanical resistance.Therefore,it was illustrated the coordination between CC_(area) and mechanical resistance,along with the changes in structural traits might be responsible(at least partially)for this shift of leaf energy investment strategy for trees occurred at different successional subtropical forests.

关 键 词：叶片撕裂力 叶片穿透力 能量投资 叶片寿命 光合速率 

分 类 号：S718.54[农业科学—林学]