Night and day - Circadian regulation of night-time dark respiration and light-enhanced dark respiration in plant leaves and canopies

Visualitza/ Obre
Data de publicació
2017Autor/a
Gessler, Arthur
Roy, Jacques
Kayler, Zachary
Bahn, Michael
Del Castillo, Jorge
Devidal, Sébastien
García-Muñoz, Sonia
Landais, Damien
Milcu, Alexandru
Piel, Clément
Pirhofer Walzl, Karin
Galiano, Lucia
Schaub, Marcus
Haeni, Matthias
Ravel, Olivier
Salekin, Serajis
Tissue, David T.
Tjoelker, Mark G.
Hoch, Güter
Citació recomanada
Gessler, Arthur;
Roy, Jacques;
Kayler, Zachary;
Ferrio Díaz, Juan Pedro;
Alday, Josu G.;
Bahn, Michael;
...
Resco de Dios, Víctor.
(2017)
.
Night and day - Circadian regulation of night-time dark respiration and light-enhanced dark respiration in plant leaves and canopies.
Environmental and Experimental Botany, 2017, vol. 137, p. 14-25.
https://doi.org/10.1016/j.envexpbot.2017.01.014.
Metadades
Mostra el registre d'unitat completResum
The potential of the vegetation to sequester C is determined by the balance between assimilation and respiration. Respiration is under environmental and substrate-driven control, but the circadian clock might also contribute. To assess circadian control on night-time dark respiration (RD) and on light enhanced dark respiration (LEDR) - the latter providing information on the metabolic reorganization in the leaf during light-dark transitions - we performed experiments in macrocosms hosting canopies of bean and cotton. Under constant darkness (plus constant air temperature and air humidity), we tested whether circadian regulation of RD scaled from leaf to canopy respiration. Under constant light (plus constant air temperature and air humidity), we assessed the potential for leaf-level circadian regulation of LEDR. There was a clear circadian oscillation of leaf-level RD in both species and circadian patterns scaled to the canopy. LEDR was under circadian control in cotton, but not in bean indicating species-specific controls. The circadian rhythm of LEDR in cotton might indicate variable suppression of the normal cyclic function of the tricarboxylic-acid-cycle in the light. Since circadian regulation is assumed to act as an adaptive memory to adjust plant metabolism based on environmental conditions from previous days, circadian control of RD may help to explain temporal variability of ecosystem respiration.
És part de
Environmental and Experimental Botany, 2017, vol. 137, p. 14-25Projectes de recerca europeus
Els fitxers de llicència següents estan associats amb aquest element: