Global diurnal and nocturnal parameters of stomatal conductance in woody plants and major crops
Hoshika, Yasutomo (Consiglio Nazionale delle Ricerche. Istituto per la Protezione Sostenibile delle Piante)
Osada, Yutaka (Sōgō Chikyū Kankyōgaku Kenkyūjo)
De Marco, Alessandra (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Paoletti, Elena (Consiglio Nazionale delle Ricerche. Istituto per la Protezione Sostenibile delle Piante)

Fecha:	2018
Resumen:	Aim: stomata regulate CO₂ uptake, water-vapour loss and uptake of gaseous pollutants. Jarvis-type models that apply multiple-constraint functions are commonly used to estimate stomatal conductance (gs), but most parameters for plant functional types (PFTs) have been estimated using limited information. We refined the data set of key components of the gs response to environmental factors in global PFTs. - Location: global. - Time period: data published in 1973-2015. - Major taxa studied: woody plants and major crops (rice, wheat and maize). - Methods: we reviewed 235 publications of field-observed gs for the parameterization of Jarvis-type models in global PFTs. The relationships between stomatal parameters and climatic factors [mean annual air temperature (MAT) and mean annual precipitation (MAP)] were assessed. - Results: we found that maximal stomatal conductance (gmax) in global woody plants was correlated with MAP rather than with MAT. The gmax of woody plants on average increased from 0. 18 to 0. 26 mol/m²/s with an increase in MAP from 0 to 2,000 mm. Models, however, can use a single gmax across major crops (0. 44 mol/m²/s). We propose similar stomatal responses to light for C₃ crops and woody plants, but C₄ crops should use a higher light saturation point of gs. Stomatal sensitivity to vapour-pressure deficit (VPD) was similar across forest PFTs and crops, although desert shrubs had a relatively low sensitivity of stomata to VPD. The optimal temperature for gs increased by 1 °C for every 3. 0 °C of MAT. Stomatal sensitivity to predawn water potential was reduced in hot and dry climate. The fraction of nighttime conductance to gmax (0. 14 for forest trees, 0. 28 for desert shrubs and 0. 13 for crops) should be incorporated into the models. - Main conclusions: this analysis of global gs data provides a new summary of gs responses and will contribute to modelling studies for plant-atmosphere gas exchange and land-surface energy partitioning.
Ayudas:	European Commission 610028 European Commission 282910 Ministerio de Economía y Competitividad CGL2016-79835-P Ministerio de Economía y Competitividad CGL2013-48074-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-274
Nota:	Altres ajuts: LIFE+ project FO3REST, Grant/Award Number: LIFE10 ENV/FR/208; LIFE+ project MOTTLES, Grant/Award Number: LIFE15 ENV/IT/000183
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Crops ; Forests ; Plant functional types ; Jarvis-type model ; Nocturnal stomatal conductance ; Stomatal conductance
Publicado en:	Global ecology and biogeography, Vol. 27, issue 2 (Feb. 2018) , p. 257-275, ISSN 1466-822X

DOI: 10.1111/geb.12681

Post-print 75 p, 2.8 MB

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
Artículos > Artículos de investigación
Artículos > Artículos publicados