Web of Science: 6 citas, Scopus: 5 citas, Google Scholar: citas,
Light inhibition of foliar respiration in response to soil water availability and seasonal changes in temperature Mediterranean holm oak. (quercus ilex forest)
Turnbull, Matthew H. (University of Canterbury. Centre for Integrative Ecology (New Zealand))
Ogaya Inurrigarro, Romà (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Barbeta i Margarit, Adrià (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Zaragoza Castells, Joana (University of Exeter. Geography)
Atkin, Owen K. (The Australian National University. Centre of Excellence in Plant Energy Biology)
Valladares, Fernando (Museo Nacional de Ciencias Naturales - CSIC)
Gimeno, Teresa E. (University of Western Sydney. Hawkesbury Institute for the Environment)
Pías, Beatriz (Universidad Complutense de Madrid. Departamento de Botánica)
Griffin, Kevin L. I (Lamont-Doherty Earth Observatory of Columbia University)

Fecha: 2017
Resumen: In the present study we investigated variations in leaf respiration in darkness (RD) and light (RL), and associated traits in response to season, and along a gradient of soil moisture, in Mediterranean woodland dominated by holm oak (Quercus ilex L. ) in central and north-eastern Spain respectively. On seven occasions during the year in the central Spain site, and along the soil moisture gradient in north-eastern Spain, we measured rates of leaf RD, RL (using the Kok method), light-saturated photosynthesis (A) and related light response characteristics, leaf mass per unit area (MA) and leaf nitrogen (N) content. At the central Spain site, significant seasonal changes in soil water content and ambient temperature (T) were associated with changes in MA, foliar N, A and stomatal conductance. RD measured at the prevailing daily T and in instantaneous R-T responses, displayed signs of partial acclimation and was not significantly affected by time of year. RL was always less than, and strongly related to, RD, and RL/RD did not vary significantly or systematically with seasonal changes in T or soil water content. Averaged over the year, RL/RD was 0. 66 ± 0. 05 s. e. (n = 14) at the central Spain site. At the north-eastern Spain site, the soil moisture gradient was characterised by increasing MA and RD, and reduced foliar N, A, and stomatal conductance as soil water availability decreased. Light inhibition of R occurred across all sites (mean RL/RD = 0. 69 ± 0. 01 s. e. (n = 18)), resulting in ratios of RL/A being lower than for RD/A. Importantly, the degree of light inhibition was largely insensitive to changes in soil water content. Our findings provide evidence for a relatively constrained degree of light inhibition of R (RL/RD ~ 0. 7, or inhibition of ~30%) across gradients of water availability, although combined impacts of seasonal changes in both T and soil water content increase the range of values expressed. The findings thus have implications in terms of the assumptions made by predictive models that seek to account for light inhibition of R, and for our understanding of how environmental gradients impact on leaf trait relationships in Mediterranean plant communities.
Nota: Número d'acord de subvenció EC/FP7/610028
Nota: Número d'acord de subvenció MINECO/CGL2013-48074-P
Nota: Número d'acord de subvenció MINECO/CGL2016-79835-P
Nota: Número d'acord de subvenció AGAUR/SGR/2014-274
Derechos: Tots els drets reservats
Lengua: Anglès
Documento: article ; recerca ; acceptedVersion
Materia: Kok effect ; Leaf functional traits ; Leaf dark respiration ; Leaf light respiration ; Leaf mass per unit area ; Nitrogen ; Photosynthesis ; Plasticity ; Season ; Soil moisture ; Temperature
Publicado en: Functional plant biology, Vol. 44, Issue 12 (2017) , p. 1178-1193, ISSN 1445-4408

DOI: 10.1071/FP17032

39 p, 869.1 KB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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 Registro creado el 2020-02-12, última modificación el 2020-08-02

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