Altmetric

Circadian rhythms have significant effects on leaf-to-canopy scale gas exchange under field conditions

Title: Circadian rhythms have significant effects on leaf-to-canopy scale gas exchange under field conditions
Authors: Resco de Dios, V
Gessler, A
Pedro Ferrio, J
Alday, JG
Bahn, M
Del Castillo, J
Devidal, S
Garcia-Munoz, S
Kayler, Z
Landais, D
Martin-Gomez, P
Milcu, A
Piel, C
Pirhofer-Walzl, K
Ravel, O
Salekin, S
Tissue, DT
Tjoelker, MG
Voltas, J
Roy, J
Item Type: Journal Article
Abstract: Background Molecular clocks drive oscillations in leaf photosynthesis, stomatal conductance, and other cell and leaf-level processes over ∼24 h under controlled laboratory conditions. The influence of such circadian regulation over whole-canopy fluxes remains uncertain; diurnal CO2 and H2O vapor flux dynamics in the field are currently interpreted as resulting almost exclusively from direct physiological responses to variations in light, temperature and other environmental factors. We tested whether circadian regulation would affect plant and canopy gas exchange at the Montpellier European Ecotron. Canopy and leaf-level fluxes were constantly monitored under field-like environmental conditions, and under constant environmental conditions (no variation in temperature, radiation, or other environmental cues). Results We show direct experimental evidence at canopy scales of the circadian regulation of daytime gas exchange: 20–79 % of the daily variation range in CO2 and H2O fluxes occurred under circadian entrainment in canopies of an annual herb (bean) and of a perennial shrub (cotton). We also observed that considering circadian regulation improved performance by 8–17 % in commonly used stomatal conductance models. Conclusions Our results show that circadian controls affect diurnal CO2 and H2O flux patterns in entire canopies in field-like conditions, and its consideration significantly improves model performance. Circadian controls act as a ‘memory’ of the past conditions experienced by the plant, which synchronizes metabolism across entire plant canopies.
Issue Date: 20-Oct-2016
Date of Acceptance: 20-Sep-2016
URI: http://hdl.handle.net/10044/1/51401
DOI: https://dx.doi.org/10.1186/s13742-016-0149-y
ISSN: 2047-217X
Publisher: BioMed Central
Journal / Book Title: GigaScience
Volume: 5
Copyright Statement: © 2016 The Author(s). Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
Circadian clock
Ecological memory
Net ecosystem exchange
Scaling
Stomatal conductance models
Photosynthesis
Transpiration
CARBON-DIOXIDE EXCHANGE
STOMATAL CONDUCTANCE
WATER-USE
PHOTOSYNTHESIS
TRANSPIRATION
GROWTH
PLANTS
ASSIMILATION
ARABIDOPSIS
ATMOSPHERE
Circadian clock
Ecological memory
Net ecosystem exchange
Photosynthesis
Scaling
Stomatal conductance models
Transpiration
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
Circadian clock
Ecological memory
Net ecosystem exchange
Scaling
Stomatal conductance models
Photosynthesis
Transpiration
CARBON-DIOXIDE EXCHANGE
STOMATAL CONDUCTANCE
WATER-USE
PHOTOSYNTHESIS
TRANSPIRATION
GROWTH
PLANTS
ASSIMILATION
ARABIDOPSIS
ATMOSPHERE
Publication Status: Published
Article Number: 43
Appears in Collections:Repository Tools



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Creative Commonsx