Leaf photosynthetic traits of 14 tropical rain forest species in relation to leaf nitrogen concentration and shade tolerance
| Autor: | Céline Born, Jean-Christophe Roggy, Damien Bonal, Pascal Imbert, Erwin Dreyer, Sabrina Coste |
|---|---|
| Přispěvatelé: | Ecologie des forêts de Guyane (ECOFOG), Ecole Nationale du Génie Rural, des Eaux et des Forêts (ENGREF)-Institut National de la Recherche Agronomique (INRA)-Université des Antilles et de la Guyane (UAG)-Centre National de la Recherche Scientifique (CNRS), Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) |
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
0106 biological sciences
arbre forestier NITROGEN-USE EFFICIENCY Eperua Light Physiology Rain COUEPIA CARYOPHYLLOIDES Plant Science 01 natural sciences Trees FUNCTIONAL DIVERSITY [SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture forestry Photosynthesis amérique du sud HYMENAEA COURBARIL Shade tolerance azote biology food and beverages TABEBUIA INSIGNIS LEAF CARBON Darkness VIROLA LEAF NITROGEN SYMPHONIA GLOBULIFERA besoin en lumière dom PHOTOSYNTHETIC CAPACITY AMANOA GUIANENSIS feuille Nitrogen forêt tropicale humide 010603 evolutionary biology VOUACAPOUA AMERICANA TROPICAL RAIN FOREST BAGASSA GUIANENSIS CARAPA PROCERA CECROPIA OBTUSA EPERUA LICANIA HETEROMORPHA Species Specificity Botany Ecosystem photosynthèse Nitrogen cycle Tropical Climate Virola fungi Interspecific competition 15. Life on land biology.organism_classification Photosynthetic capacity Carbon Plant Leaves tolérance à l'ombre guyane française Energy Metabolism 010606 plant biology & botany |
| Zdroj: | Tree Physiology Tree Physiology, Oxford University Press (OUP): Policy B-Oxford Open Option B, 2005, 25 (9), pp.1127-1137 Tree Physiology (Oxford Academic) 9 (25), 1127-1137. (2005) |
| ISSN: | 0829-318X 1758-4469 |
| Popis: | Variability of leaf traits related to photosynthesis was assessed in seedlings from 14 tree species growing in the tropical rain forest of French Guiana. Leaf photosynthetic capacity (maximum rate of carboxylation and maximum rate of electron transport) was estimated by fitting a biochemical model of photosynthesis to response curves of net CO2 assimilation rate versus intercellular CO2 mole fraction. Leaf morphology described by leaf mass per unit leaf area (LMA), density and thickness, as well as area- and mass-based nitrogen (N) and carbon (C) concentrations, were recorded on the same leaves. Large interspecific variability was detected in photosynthetic capacity as well as in leaf structure and leaf N and C concentrations. No correlation was found between leaf thickness and density. The correlations between area- and mass-based leaf N concentration and photosynthetic capacity were poor. Conversely, the species differed greatly in relative N allocation to carboxylation and bioenergetics. Principal component analysis (PCA) revealed that, of the recorded traits, only the computed fraction of total leaf N invested in photosynthesis was tightly correlated to photosynthetic capacity. We also used PCA to test to what extent species with similar shade tolerances displayed converging leaf traits related to photosynthesis. No clear-cut ranking could be detected among the shade-tolerant groups, as confirmed by a one-way ANOVA. We conclude that the large interspecific diversity in photosynthetic capacity was mostly explained by differences in the relative allocation of N to photosynthesis and not by leaf N concentration, and that leaf traits related to photosynthetic capacity did not discriminate shade-tolerance ranking of these tropical tree species. |
| Databáze: | OpenAIRE |
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