Trait coordination, mechanical behaviour and growth form plasticity of Amborella trichopoda under variation in canopy openness

Autor: Sandrine Isnard, Daniel Barthélémy, Mark E. Olson, Santiago Trueba
Přispěvatelé: Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad Universitaria México, budget resources of the Laboratoire de Botanique et d'Ecologie Vegetale Apliquees, Institut de Recherche pour le Developpement, PhD grant from Consejo Nacional de Ciencia y Tecnologia (CONACYT, Mexico) [217745], Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Trueba, Santiago
Jazyk: angličtina
Rok vydání: 2016
Předmět:
0106 biological sciences
Phylogénie
[SDV]Life Sciences [q-bio]
F62 - Physiologie végétale - Croissance et développement
Plant Science
01 natural sciences
F50 - Anatomie et morphologie des plantes
phenotypic plasticity
Tronc
Port de la plante
light environment
Feuille
food and beverages
modulus of elasticity
Facteur du milieu
Anatomie végétale
Trait
Arbuste
Research Article
plant architecture
F40 - Écologie végétale
Facteur écologique
Lumière
leaf mass per area
Biology
010603 evolutionary biology
Intraspecific competition
biomechanics
Magnoliophyta
Bioinformatique
Botany
allometry
Leaf size
Adaptation
Croissance
Propriété physicochimique
Synapomorphy
Phenotypic plasticity
Morphologie végétale
fungi
15. Life on land
Sympodial
Propriété mécanique
Allometry
Angiosperme
010606 plant biology & botany
Zdroj: AoB Plants
AoB Plants, Oxford University Press 2016, 8, pp.1-18. ⟨10.1093/aobpla/plw068⟩
AoB Plants, 2016, 8, pp.1-18. ⟨10.1093/aobpla/plw068⟩
AoB Plants (8), 1-18. (2016)
ISSN: 2041-2851
DOI: 10.1093/aobpla/plw068⟩
Popis: Finding that Amborella trichopoda is sister to the rest of the angiosperms has raised the question of whether it shares certain key functional trait characteristics and plastic responses apparently widespread within the angiosperms at large. With this in mind, Trueba et al. tested the hypothesis that local canopy openness induces plastic responses in Amborella. The authors provide evidence of intraspecific coordination between leaf and stem economic spectra in this key species. Moreover, by presenting the first architectural and biomechanical characterization of Amborella, their study offers new insights for the understanding of the early sequences of angiosperm form evolution.
Understanding the distribution of traits across the angiosperm phylogeny helps map the nested hierarchy of features that characterize key nodes. Finding that Amborella is sister to the rest of the angiosperms has raised the question of whether it shares certain key functional trait characteristics, and plastic responses apparently widespread within the angiosperms at large. With this in mind, we test the hypothesis that local canopy openness induces plastic responses. We used this variation in morphological and functional traits to estimate the pervasiveness of trait scaling and leaf and stem economics. We studied the architecture of Amborella and how it varies under different degrees of canopy openness. We analyzed the coordination of 12 leaf and stem structural and functional traits, and the association of this covariation with differing morphologies. The Amborella habit is made up of a series of sympodial modules that vary in size and branching pattern under different canopy openness. Amborella stems vary from self-supporting to semi-scandent. Changes in stem elongation and leaf size in Amborella produce distinct morphologies under different light environments. Correlations were found between most leaf and stem functional traits. Stem tissue rigidity decreased with increasing canopy openness. Despite substantial modulation of leaf size and leaf mass per area by light availability, branches in different light environments had similar leaf area-stem size scaling. The sympodial growth observed in Amborella could point to an angiosperm synapomorphy. Our study provides evidence of intraspecific coordination between leaf and stem economic spectra. Trait variation along these spectra is likely adaptive under different light environments and is consistent with these plastic responses having been present in the angiosperm common ancestor.
Databáze: OpenAIRE
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