上海辰山植物园不同生活型木本植物枝叶大小关系的比较

doi:10.7525/j.issn.1673-5102.2020.05.001

摘要/Abstract

摘要： 植物枝叶生长普遍存在显著的正相关关系，决定了植物构型塑造和生物量分配。以上海辰山植物园149种木本植物为对象，通过测定顶枝上70 cm长枝条的直径、叶面积及其生物量，比较相同生境条件下不同生活型木本植物的枝叶大小关系。结果表明，枝条截面积与总叶面积间呈异速生长关系（a=1.148 6，CI=1.000 6~1.302 3），枝条干重与叶干重间呈等速生长关系（a=1.054 2，CI=0.921 3~1.205 6），不同生活型均具有相同的斜率系数a。不同生活型的异速生长常量b（y轴截距）存在显著差异，相同枝条截面积下落叶乔木比常绿乔木和常绿灌木具有更大的叶面积，相同枝条干重下常绿乔木和落叶乔木比常绿灌木具有更大的叶干重。这可能与不同生活型木本植物水分竞争效率和叶建成成本差异有关。

关键词: 枝叶关系, 生物量分配, 叶面积, 权衡关系

Abstract: There is a significant positive correlation between stem and leaves, which determines the plant architecture and biomass allocation. In this study, leaf and stem mass, total leaf area, stem cross-sectional area of 70 cm long leading-shoot were investigated for 149 woody species in Shanghai Chenshan Botanical Garden. The stem-leaf size relationships were analyzed for individuals in similar habitats. The results showed that there was allometric scaling relationships with stem cross-sectional area and total leaf area with a common slop(a=1.148 6, CI=1.000 6-1.302 3) for different life forms. However, leaf mass was found to be isometrically related to stem mass(a=1.054 2, CI=0.921 3-1.205 6) for all life forms. For both of area-based or mass-based stem-leaf relationship, there were significant differences in allometric/isometric regression constants b(y-intercept) among different life forms. Deciduous trees had larger leaf area than evergreen trees and shrubs given the same stem cross-sectional area, while evergreen trees and deciduous trees had larger leaf mass than evergreen shrubs given the same stem mass. Therefore, this may be related to the difference of water competition efficiency and leaf construction cost among different life-forms of woody plants.

Key words: twig-leaf relationship, biomass allocation, leaf area, trade-off

中图分类号:

S567.1

商侃侃, 张希金, 宋坤. 上海辰山植物园不同生活型木本植物枝叶大小关系的比较[J]. 植物研究, 2020, 40(5): 641-647.

SHANG Kan-Kan, ZHANG Xi-Jin, SONG Kun. Variation of Stem-leaf Size Relationship of Woody Plants among Different LifeForms in Shanghai Chenshan Botanical Garden[J]. Bulletin of Botanical Research, 2020, 40(5): 641-647.

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