Tree differences in primary and secondary growth drive convergent scaling in leaf area to sapwood area across Europe

Détails bibliographiques
Publié dans:	The New phytologist. - 1984. - 218(2018), 4 vom: 12. Juni, Seite 1383-1392
Auteur principal:	Petit, Giai (Auteur)
Autres auteurs:	von Arx, Georg, Kiorapostolou, Natasa, Lechthaler, Silvia, Prendin, Angela Luisa, Anfodillo, Tommaso, Caldeira, Maria C, Cochard, Hervé, Copini, Paul, Crivellaro, Alan, Delzon, Sylvain, Gebauer, Roman, Gričar, Jožica, Grönholm, Leila, Hölttä, Teemu, Jyske, Tuula, Lavrič, Martina, Lintunen, Anna, Lobo-do-Vale, Raquel, Peltoniemi, Mikko, Peters, Richard L, Robert, Elisabeth M R, Roig Juan, Sílvia, Senfeldr, Martin, Steppe, Kathy, Urban, Josef, Van Camp, Janne, Sterck, Frank
Format:	Article en ligne
Langue:	English
Publié:	2018
Accès à la collection:	The New phytologist
Sujets:	Journal Article Research Support, Non-U.S. Gov't allocation climate change functional balance leaf area plant architecture sapwood structural balance xylem

Description
Résumé:	© 2018 The Authors. New Phytologist © 2018 New Phytologist Trust. Trees scale leaf (AL ) and xylem (AX ) areas to couple leaf transpiration and carbon gain with xylem water transport. Some species are known to acclimate in AL : AX balance in response to climate conditions, but whether trees of different species acclimate in AL : AX in similar ways over their entire (continental) distributions is unknown. We analyzed the species and climate effects on the scaling of AL vs AX in branches of conifers (Pinus sylvestris, Picea abies) and broadleaved (Betula pendula, Populus tremula) sampled across a continental wide transect in Europe. Along the branch axis, AL and AX change in equal proportion (isometric scaling: b ˜ 1) as for trees. Branches of similar length converged in the scaling of AL vs AX with an exponent of b = 0.58 across European climates irrespective of species. Branches of slow-growing trees from Northern and Southern regions preferentially allocated into new leaf rather than xylem area, with older xylem rings contributing to maintaining total xylem conductivity. In conclusion, trees in contrasting climates adjust their functional balance between water transport and leaf transpiration by maintaining biomass allocation to leaves, and adjusting their growth rate and xylem production to maintain xylem conductance
Description:	Date Completed 01.10.2019 Date Revised 30.09.2020 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.15118