Leaf anatomical properties in relation to differences in mesophyll conductance to CO2 and photosynthesis in two related Mediterranean Abies species
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Date
2012
Authors
Peguero Pina, José JavierFlexas J
Galmés J
Niinemets U
Sancho Knapik, Domingo
Barredo G
Villarroya D
Gil Pelegrín, Eustaquio
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articleArticle
Abstract
Abies alba and Abies pinsapo are closely related species with the same ribulose 1·5-bisphosphate carboxylase/oxygenase (Rubisco) large subunit (rbcL) but contrasting hydraulic traits and mesophyll structure occurring in the Iberian Peninsula under contrasting conditions. As photosynthesis and hydraulic capacities often co-scale, we hypothesize that these species differ in mesophyll conductance to CO2 (gm). gm and key anatomical traits were measured in both species. Drought-adapted population of A.pinsapo has higher photosynthesis than the more mesic population of A.alba, in agreement with its higher hydraulic capacity. However, A.alba exhibits the largest stomatal conductance (gs), and so water use efficiency (WUE) is much higher in A.pinsapo. The differences in photosynthesis were explained by differences in gm, indicating a correlation between hydraulic capacity and gm. We report a case where gm is the main factor limiting photosynthesis in one species (A.alba) when compared with the other one (A.pinsapo). The results also highlight the discrepancy between gm estimates based on anatomical measurements and those based on gas exchange methods, probably due to the very large resistance exerted by cell walls and the stroma in both species. Thus, the cell wall and chloroplast properties in relation to CO2 diffusion constitute a near-future research priority. © 2012 Blackwell Publishing Ltd.
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Bibliographic citation
Peguero-Pina, J. J., Flexas, J., Galmés, J., Niinemets, Ü., Sancho-Knapik, D., Barredo, G., Villarroya, D., & Gil-Pelegrín, E. (2012). Leaf anatomical properties in relation to differences in mesophyll conductance to CO2 and photosynthesis in two related Mediterranean Abies species. Plant, Cell & Environment, 35(12), 2121-2129. https://doi.org/10.1111/j.1365-3040.2012.02540.x
AGROVOC subjects
Abies albaAbies pinsapo
Conductancia hidráulica de raíces
Uso del agua
CO2
Other field subjects
abandoned landAbies
Abies alba
Abies pinsapo
Adaptation
Adaptation, Physiological
ALBA MILL.
Anatomy
Article
Capacity
Carbon Dioxide
Cell Wall
Chloroplast
Chloroplast thickness
Conductivity
Coniferous Tree
Cytology
Diffusion
DIFFUSION CONDUCTANCE
Drought
drought resistance
Droughts
DRY MASS
Ecomorphology
Efficiency
Gas Exchange
Gene Expression
Iberian Peninsula
INTERNAL CONDUCTANCE
Leaf morphology
Leaves
life history trait
Light
Mediterranean Environment
Membrane
mesophyll cell
Mesophyll cells
Metabolism
Photosynthesis
Physiology
PINACEAE
Plant Leaf
Plant Leaves
Species Difference
Species Specificity
Stomatal conductance
Temperature response
Water use efficiency
Sponsorship
Este estudio ha sido parcialmente financiado por el proyecto GA-LC-002/2010 de la CAIXA (Departamento de Ciencia, Tecnología y Universidad, Gobierno de Aragón) y por los proyectos AGL2010-21153-C02-02 y BFU2011-23294 (Ministerio de Ciencia e Innovación, España). También se agradece el apoyo financiero del Gobierno de Aragón (grupo de investigación A54). El trabajo de José Javier Peguero-Pina cuenta con el apoyo de un contrato postdoctoral 'Juan de la Cierva'-MICIIN.