Variation of Stem-leaf Size Relationship of Woody Plants among Different LifeForms in Shanghai Chenshan Botanical Garden

doi:10.7525/j.issn.1673-5102.2020.05.001

Abstract

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

CLC Number:

S567.1

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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