The relative weight of ontogeny, topology and climate in the architectural development of three North American conifers

AoB Plants
Fabien BuissartEric-André Nicolini

Abstract

Knowledge of plant architecture allows retrospective study of plant development, hence provides powerful tools, through modelling and simulation, to link this development with environmental constraints, and then predict its response to global change. The present study aims to determine some of the main endogenous and exogenous variables driving the architectural development of three North American conifers. We measured architectural traits retrospectively on the trunk, branches and twigs of whole tree crowns for each species: annual shoot length (ASL), needle length, branching patterns and reproduction organs (male and female). We fitted a partial least square (PLS) regression to explain each architectural trait with respect to topological, ontogenic and climatic variables. Results showed a significant weight of these three groups of variables for previous and current year, corresponding, respectively, to organogenesis and elongation. Topological and ontogenic variables had the greatest weight in models. Particularly, all architectural traits were strongly correlated with ASL. We highlighted a negative architectural response of two species to higher than average temperatures, whereas the third one took advantage of these higher...Continue Reading

References

Aug 18, 2009·Annals of Botany·Florence Chaubert-PereiraYann Guédon
Nov 23, 2012·Nature·Brendan ChoatAmy E Zanne
Jan 30, 2015·Tree Physiology·Linda M FeichtingerAndreas Rigling
Feb 17, 2015·Global Change Biology·Xanthe J WalkerJill F Johnstone
Dec 25, 2015·Nature·Georges KunstlerMark Westoby
Dec 14, 2016·Proceedings of the National Academy of Sciences of the United States of America·Martin P GirardinJagtar Bhatti
Apr 19, 2017·Global Change Biology·Mathias NeumannRupert Seidl
Sep 12, 2017·The New Phytologist·Jean PeyhardiYann Guédon
Dec 8, 2017·Proceedings. Biological Sciences·Ian S PearseWalter D Koenig

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