Nocturnal plant respiration is under strong non-temperature control

Dan Bruhn (), Freya Newman, Mathilda Hancock, Peter Povlsen, Martijn Slot, Stephen Sitch, John Drake, Graham P. Weedon, Douglas B. Clark, Majken Pagter, Richard J. Ellis, Mark G. Tjoelker, Kelly M. Andersen, Zorayda Restrepo Correa, Patrick C. McGuire and Lina M. Mercado ()
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Dan Bruhn: Aalborg University
Freya Newman: University of Exeter
Mathilda Hancock: University of Exeter
Peter Povlsen: Aalborg University
Martijn Slot: Smithsonian Tropical Research Institute
Stephen Sitch: University of Exeter
John Drake: SUNY College of Environmental Science and Forestry
Graham P. Weedon: Met Office
Douglas B. Clark: UK Centre for Ecology & Hydrology
Majken Pagter: Aalborg University
Richard J. Ellis: UK Centre for Ecology & Hydrology
Mark G. Tjoelker: Western Sydney University
Kelly M. Andersen: Nanyang Technological Institute
Zorayda Restrepo Correa: Grupo Servicios ecosistemicos y cambio climático (SECC), Corporación COL-TREE
Patrick C. McGuire: University of Reading, Department of Meteorology and National Centre for Atmospheric Science
Lina M. Mercado: University of Exeter

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Most biological rates depend on the rate of respiration. Temperature variation is typically considered the main driver of daily plant respiration rates, assuming a constant daily respiration rate at a set temperature. Here, we show empirical data from 31 species from temperate and tropical biomes to demonstrate that the rate of plant respiration at a constant temperature decreases monotonically with time through the night, on average by 25% after 8 h of darkness. Temperature controls less than half of the total nocturnal variation in respiration. A new universal formulation is developed to model and understand nocturnal plant respiration, combining the nocturnal decrease in the rate of plant respiration at constant temperature with the decrease in plant respiration according to the temperature sensitivity. Application of the new formulation shows a global reduction of 4.5 −6 % in plant respiration and an increase of 7-10% in net primary production for the present-day.

Date: 2022
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DOI: 10.1038/s41467-022-33370-1

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