Plant respiration : Controlled by photosynthesis or biomass?

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Collalti , A , Tjoelker , M G , Hoch , G , Mäkelä , A , Guidolotti , G , Heskel , M , Petit , G , Ryan , M G , Battipaglia , G , Matteucci , G & Prentice , I C 2020 , ' Plant respiration : Controlled by photosynthesis or biomass? ' , Global Change Biology , vol. 26 , no. 3 , pp. 1739-1753 . https://doi.org/10.1111/gcb.14857

Title: Plant respiration : Controlled by photosynthesis or biomass?
Author: Collalti, Alessio; Tjoelker, Mark G.; Hoch, Günter; Mäkelä, Annikki; Guidolotti, Gabriele; Heskel, Mary; Petit, Giai; Ryan, Michael G.; Battipaglia, Giovanna; Matteucci, G.; Prentice, I. Colin
Contributor organization: Department of Forest Sciences
Viikki Plant Science Centre (ViPS)
Forest Ecology and Management
Ecosystem processes (INAR Forest Sciences)
Institute for Atmospheric and Earth System Research (INAR)
Forest Modelling Group
Date: 2020-03
Language: eng
Number of pages: 15
Belongs to series: Global Change Biology
ISSN: 1354-1013
DOI: https://doi.org/10.1111/gcb.14857
URI: http://hdl.handle.net/10138/319790
Abstract: Abstract Two simplifying hypotheses have been proposed for whole-plant respiration. One links respiration to photosynthesis; the other to biomass. Using a first-principles carbon balance model with a prescribed live woody biomass turnover, applied at a forest research site where multidecadal measurements are available for comparison, we show that if turnover is fast the accumulation of respiring biomass is low and respiration depends primarily on photosynthesis; while if turnover is slow the accumulation of respiring biomass is high and respiration depends primarily on biomass. But the first scenario is inconsistent with evidence for substantial carryover of fixed carbon between years, while the second implies far too great an increase in respiration during stand development ? leading to depleted carbohydrate reserves and an unrealistically high mortality risk. These two mutually incompatible hypotheses are thus both incorrect. Respiration is not linearly related either to photosynthesis or to biomass, but it is more strongly controlled by recent photosynthates (and reserve availability) than by total biomass.
Subject: 1181 Ecology, evolutionary biology
1172 Environmental sciences
biomass accumulation
carbon use efficiency
gross primary production
maintenance respiration
metabolic scaling theory
net primary production
non-structural carbohydrates
Plant respiration
NET PRIMARY PRODUCTION
STEM CO2 EFFLUX
GLOBAL VEGETATION MODEL
NONSTRUCTURAL CARBON
FOREST ECOSYSTEM MODEL
METABOLIC THEORY
plant respiration
nonstructural carbohydrates
CARBON ALLOCATION
STORED CARBON
FAGUS-SYLVATICA
BGC-MODEL
11831 Plant biology
Peer reviewed: Yes
Rights: unspecified
Usage restriction: openAccess
Self-archived version: acceptedVersion


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