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

Journal Article · · GigaScience
 [1];  [2];  [3];  [4];  [5];  [1];  [6];  [7];  [8];  [6];  [1];  [9];  [6];  [10];  [11];  [12];  [13];  [13];  [1];  [6]
  1. Univ. de Lleida (Spain). Dept. of Crop and Forest Sciences Agrotecnico Center
  2. Swiss Federal Inst. for Forest, Snow and Landscape Research, Long-term Forest Ecosystem Research, Birmensdorf (Switzerland); Leibniz Centre for Agricultural Landscape Research, Muncheberg (Germany)
  3. Univ. de Lleida (Spain). Dept. of Crop and Forest Sciences Agrotecnico Center; Univ. de Concepcion, Concepcion (Chile). Dept. de Botanica
  4. Univ. de Lleida (Spain). Dept. of Crop and Forest Sciences Agrotecnico Center; Univ. of Liverpool (United Kingdom). School of Environmental Sciences
  5. Univ. of Innsbruck, Innsbruck (Austria). Inst. of Ecology
  6. Centre National de la Recherche Scientifique (CNRS), Montferrier-sur-Lez (France). Ecotron Europeen de Montpellier
  7. Madrid Inst. for Research and Rural Development, Agrarian and Food, Farm 'El Encin', Madrid (Spain)
  8. Leibniz Centre for Agricultural Landscape Research, Muncheberg (Germany); US Dept. of Agriculture (USDA)., Livermore, CA (United States). Forest Service, Northern Research Station; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  9. Centre National de la Recherche Scientifique (CNRS), Montferrier-sur-Lez (France). Ecotron Europeen de Montpellier; Univ. de Montpellier (France)
  10. Leibniz Centre for Agricultural Landscape Research, Muncheberg (Germany); Freie Univ., Berlin (Germany). Inst. fur Biologie, Plant Ecology; Berlin-Brandenburg Inst. of Advanced Biodiversity Research, Berlin (Germany)
  11. Centre National de la Recherche Scientifique (CNRS), Montferrier-sur-Lez (France). Ecotron Europeen de Montpellie
  12. Univ. de Lleida (Spain). Erasmus Mundus Master on Mediterranean Forestry and Natural Resources Management; Univ. of Canterbury, Christchurch (New Zealand). School of Forestry, College of Engineering
  13. Western Sydney Univ., Richmond, NSW (Australia). Hawkesbury Inst. for the Environment
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. Lastly, circadian controls act as a ‘memory’ of the past conditions experienced by the plant, which synchronizes metabolism across entire plant canopies.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1395308
Journal Information:
GigaScience, Journal Name: GigaScience Journal Issue: 1 Vol. 5; ISSN 2047-217X
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (11)

Daily humidity oscillation regulates the circadian clock to influence plant physiology journal October 2018
Circadian Regulation and Diurnal Variation in Gas Exchange journal August 2017
Ecotrons: Powerful and versatile ecosystem analysers for ecology, agronomy and environmental science journal January 2021
Photosynthetic Acclimation to Fluctuating Irradiance in Plants journal March 2020
Additional file 1 of Circadian rhythm response and its effect on photosynthetic characteristics of the Lhcb family genes in tea plant dataset January 2024
CO2 uptake and chlorophyll a fluorescence of Suaeda fruticosa grown under diurnal rhythm and after transfer to continuous dark journal July 2019
Atmospheric humidity and genotype are key determinants of the diurnal stomatal conductance pattern journal November 2019
Antecedent soil water content and vapor pressure deficit interactively control water potential in Larrea tridentata journal August 2018
Thermal imaging as a noninvasive technique for analyzing circadian rhythms in plants journal September 2019
Effects of a Heat Wave on Nocturnal Stomatal Conductance in Eucalyptus camaldulensis journal June 2018
Life after Harvest: Circadian Regulation in Photosynthetic Pigments of Rocket Leaves during Supermarket Storage Affects the Nutritional Quality journal July 2019

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