130811 20240319081003.0 doi 10.1016/j.agrformet.2022.109218 sideral 131288 ART-2022-131288 eng Sancho-Knapik, Domingo Universidad de Zaragoza (orcid)0000-0001-9584-7471 Vapor pressure deficit constrains transpiration and photosynthesis in holm oak: A comparison of three methods during summer drought. 2022 High rates of vapor pressure deficit (VPD) can severely decrease plant productivity by reducing stomatal conductance, which might be exacerbated during Mediterranean summers due to soil water deficit. In this study, we monitored the response of holm oak, the archetype of Mediterranean trees, to changes in VPD during a summer drought period to evaluate the effects and consequences on gas exchange of the two water stresses (atmospheric and soil). Measurements were performed on trees growing in an experimental plantation over two summers with moderate drought stress by using three different methods: at the leaf level with an infrared gas analyzer, using a whole-plant chamber for short-term monitoring at the tree level, and measuring the canopy temperature for long-term monitoring. The three methods provided negative relationships between leaf conductance and VPD but with discrepancies probably associated with the measurement scale. Overall, the results showed that atmospheric and soil water stress had an additive effect. Under well-watered conditions, an increase in VPD was partially compensated by a reduction in stomatal conductance, resulting in a slight increase in the transpiration rates. With soil water deficit, the response to VPD resulted in a further decrease in stomatal conductance, reducing transpiration as a water saving strategy. The decrease in conductance in response to VPD was transitory, recovering to initial values as soon as the VPD decreased, both under well-watered and drought conditions. Due to this high sensitivity to atmospheric drought, the maximum carbon gain rates of holm oak were restricted to a short environmental window, which might modulate its physiological performance and natural distribution. info:eu-repo/grantAgreement/ES/DGA/H09-20R info:eu-repo/grantAgreement/ES/MICINN/PID2019-106701RR-I00 info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 6.2 2022 FORESTRY 3 / 69 = 0.043 2022 Q1 T1 AGRONOMY 6 / 88 = 0.068 2022 Q1 T1 METEOROLOGY & ATMOSPHERIC SCIENCES 16 / 94 = 0.17 2022 Q1 T1 1.623 2022 Agronomy and Crop Science 2022 Q1 Global and Planetary Change 2022 Q1 Forestry 2022 Q1 Atmospheric Science 2022 Q1 10.7 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Mendoza-Herrer, Óscar Alonso-Forn, David (orcid)0000-0002-1467-1943 Saz, Miguel Ángel Universidad de Zaragoza (orcid)0000-0001-8979-0253 Martín-Sánchez, Rubén dos Santos Silva, José Víctor Ogee, Jerome Peguero-Pina, José Javier Universidad de Zaragoza (orcid)0000-0002-8903-2935 Gil-Pelegrín, Eustaquio Universidad de Zaragoza (orcid)0000-0002-4053-6681 Ferrio, Juan Pedro Universidad de Zaragoza (orcid)0000-0001-5904-7821 5011 220 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Área Ecología 5011 500 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Area Ingeniería Agroforestal 5011 705 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Área Producción Vegetal 5011 063 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Área Botánica 3006 010 Universidad de Zaragoza Dpto. Geograf. Ordenac.Territ. Área Análisis Geográfico Regi. 327 (2022), 109218 [13 pp.] Agric. for. meteorol. AGRICULTURAL AND FOREST METEOROLOGY 0168-1923 735372 http://zaguan.unizar.es/record/130811/files/texto_completo.pdf Versión publicada 2335634 http://zaguan.unizar.es/record/130811/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:130811 articulos driver 2024-03-18-14:22:58 ARTICLE