Determinants of legacy effects in pine trees - implications from an irrigation-stop experiment
Zweifel, Roman (Swiss Federal Institute for Forest. Snow and Landscape Research)
Etzold, Sophia (Swiss Federal Institute for Forest. Snow and Landscape Research)
Sterck, Frank (Swiss Federal Institute for Forest. Snow and Landscape Research)
Gessler, Arthur (Swiss Federal Institute for Forest. Snow and Landscape Research)
Anfodillo, Tommaso (Università di Padova. Dipartimento Territorio e Sistemi Agro-Forestali)
Mencuccini, Maurizio (Centre de Recerca Ecològica i d'Aplicacions Forestals)
von Arx, Georg (Swiss Federal Institute for Forest. Snow and Landscape Research)
Lazzarin, Martina (Swiss Federal Institute for Forest. Snow and Landscape Research)
Haeni, Matthias (Swiss Federal Institute for Forest. Snow and Landscape Research)
Feichtinger, Linda (Swiss Federal Institute for Forest. Snow and Landscape Research)
Meusburger, Katrin (Swiss Federal Institute for Forest. Snow and Landscape Research)
Knuesel, Simon (Swiss Federal Institute for Forest. Snow and Landscape Research)
Walthert, Lorenz (Swiss Federal Institute for Forest. Snow and Landscape Research)
Salmon, Yann (University of Helsinki. Institute for Atmospheric and Earth System Research)
Bose, Arun K. (Swiss Federal Institute for Forest. Snow and Landscape Research)
Schoenbeck, Leonie (Swiss Federal Institute for Forest. Snow and Landscape Research)
Hug, Christian (Swiss Federal Institute for Forest. Snow and Landscape Research)
De Girardi, Nicolas (Swiss Federal Institute for Forest. Snow and Landscape Research)
Giuggiola, Arnaud (Swiss Federal Institute for Forest. Snow and Landscape Research)
Schaub, Marcus (Swiss Federal Institute for Forest. Snow and Landscape Research)
Rigling, Andreas (Swiss Federal Institute for Forest. Snow and Landscape Research)

Date:	2020
Abstract:	Summary: tree responses to altered water availability range from immediate (e. g. stomatal regulation) to delayed (e. g. crown size adjustment). The interplay of the different response times and processes, and their effects on long-term whole-tree performance, however, is hardly understood. - Here we investigated legacy effects on structures and functions of mature Scots pine in a dry inner-Alpine Swiss valley after stopping an 11-yr lasting irrigation treatment. Measured ecophysiological time series were analysed and interpreted with a system-analytic tree model. - We found that the irrigation stop led to a cascade of downregulations of physiological and morphological processes with different response times. Biophysical processes responded within days, whereas needle and shoot lengths, crown transparency, and radial stem growth reached control levels after up to 4 yr only. Modelling suggested that organ and carbon reserve turnover rates play a key role for a tree's responsiveness to environmental changes. Needle turnover rate was found to be most important to accurately model stem growth dynamics. - We conclude that leaf area and its adjustment time to new conditions is the main determinant for radial stem growth of pine trees as the transpiring area needs to be supported by a proportional amount of sapwood, despite the growth-inhibiting environmental conditions.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Cambial activity ; Drought stress ; Ecological memory ; Irrigation experiment ; Osmoregulation ; Point dendrometer ; Radial stem growth ; TreeNet
Published in:	The new phytologist, Vol. 227, issue 4 (Aug. 2020) , p. 1081-1096, ISSN 1469-8137

DOI: 10.1111/nph.16582
PMID: 32259280

16 p, 3.2 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Research articles
Articles > Published articles