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Instantaneous Q10 of night-time leaf respiratory CO2 efflux - measurement and analytical protocol considerations.
Bruhn, Dan; Povlsen, Peter; Gardner, Anna; Mercado, Lina M.
Afiliação
  • Bruhn D; Department of Chemistry and Bioscience, Aalborg University, Aalborg, 9220, Denmark.
  • Povlsen P; Department of Chemistry and Bioscience, Aalborg University, Aalborg, 9220, Denmark.
  • Gardner A; Faculty of Environment, Science and Economy, University of Exeter, EX4 4QE, Exeter, UK.
  • Mercado LM; School of Biosciences, University of Birmingham, Birmingham, B14 2TT, UK.
New Phytol ; 243(1): 23-28, 2024 Jul.
Article em En | MEDLINE | ID: mdl-38600045
ABSTRACT
The temperature sensitivity (e.g. Q10) of night-time leaf respiratory CO2 efflux (RCO2) is a fundamental aspect of leaf physiology. The Q10 typically exhibits a dependence on measurement temperature, and it is speculated that this is due to temperature-dependent shifts in the relative control of leaf RCO2. Two decades ago, a review hypothesized that this mechanistically caused change in values of Q10 is predictable across plant taxa and biomes. Here, we discuss the most appropriate measuring protocol among existing data and for future data collection, to form the foundation of a future mechanistic understanding of Q10 of leaf RCO2 at different temperature ranges. We do this primarily via a review of existing literature on Q10 of night-time RCO2 and only supplement this to a lesser degree with our own original data. Based on mechanistic considerations, we encourage that instantaneous Q10 of leaf RCO2 to represent night-time should be measured only at night-time; only in response to short-term narrow temperature variation (e.g. max. 10°C) to represent a given midpoint temperature at a time; in response to as many temperatures as possible within the chosen temperature range; and on still attached leaves.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Temperatura / Dióxido de Carbono / Folhas de Planta Idioma: En Revista: New Phytol Assunto da revista: BOTANICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Dinamarca

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Temperatura / Dióxido de Carbono / Folhas de Planta Idioma: En Revista: New Phytol Assunto da revista: BOTANICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Dinamarca