Functional trade-offs are driven by coordinated changes among cell types in the wood of angiosperm trees from different climates

Zhang Guangqi, Mao Zhun, Maillard Pascale, Brancheriau Loïc, Gérard Bastien, Engel Julien, Fortunel Claire, Heuret Patrick, Maeght Jean-Luc, Martínez-Vilalta Jordi, Stokes Alexia. 2023. Functional trade-offs are driven by coordinated changes among cell types in the wood of angiosperm trees from different climates. New Phytologist, 240 (3) : 1162-1176.

https://doi.org/10.1111/nph.19132

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Url - jeu de données - Entrepôt autre : https://doi.org/10.57745/X6WW8A

Résumé : Wood performs several functions to ensure tree survival and carbon allocation to a finite stem volume leads to trade-offs among cell types. It is not known to what extent these trade-offs modify functional trade-offs and if they are consistent across climates and evolutionary lineages. Twelve wood traits were measured in stems and coarse roots across 60 adult angiosperm tree species from temperate, Mediterranean and tropical climates. Regardless of climate, clear trade-offs occurred among cellular fractions, but did not translate into specific functional trade-offs. Wood density was negatively related to hydraulic conductivity (Kth) in stems and roots, but was not linked to nonstructural carbohydrates (NSC), implying a functional trade-off between mechanical integrity and transport but not with storage. NSC storage capacity was positively associated with Kth in stems and negatively in roots, reflecting a potential role for NSC in the maintenance of hydraulic integrity in stems but not in roots. Results of phylogenetic analyses suggest that evolutionary histories cannot explain covariations among traits. Trade-offs occur among cellular fractions, without necessarily modifying trade-offs in function. However, functional trade-offs are driven by coordinated changes among xylem cell types depending on the dominant role of each cell type in stems and roots.

Mots-clés Agrovoc : bois, changement climatique, tige, carbonisation du bois, Angiosperme, bois tropical, racine

Mots-clés libres : Anatomical traits, Biome, Fibre, Parenchyma, Vessel, Xylem density

Classification Agris : F60 - Physiologie et biochimie végétale
F50 - Anatomie et morphologie des plantes

Champ stratégique Cirad : CTS 7 (2019-) - Hors champs stratégiques

Agences de financement hors UE : Agence Nationale de la Recherche, China Scholarship Council

Projets sur financement : (FRA) CEnter of the study of Biodiversity in Amazonia, (FRA) Recherches avancées sur l'arbre et les écosytèmes forestiers

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