Sap flow, leaf-level gas exchange and spectral responses to drought in Pinus sylvestris, Pinus pinea and Pinus halepensis

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dc.contributor.authorManzanera, José Antonio
dc.contributor.authorGómez Garay, María Aranzazu
dc.contributor.authorPintos López, Beatriz
dc.contributor.authorRodríguez Rastrero, Manuel
dc.contributor.authorMoreda, Eugenio
dc.contributor.authorZazo, Javier
dc.contributor.authorMartínez Falero, Eugenio
dc.contributor.authorGarcía Abril, Antonio
dc.date.accessioned2023-06-18T05:48:57Z
dc.date.available2023-06-18T05:48:57Z
dc.date.issued2016
dc.description.abstractIn a climate change scenario, Mediterranean forest species such as pines may be endangered by rising temperatures and reduced precipitation, thus calling for studies on the transpiration and water balance in pines. In this paper, the response of young plants of Pinus sylvestris L., Pinus pinea L. and Pinus halepensis Mill. to different irrigation treatments has been studied. Significant differences were found in water potential, sap flow, leaf-level gas exchange and spectral variables. P. sylvestris had higher pre-dawn and midday water potentials, sap flow rates and leaf-level gas exchange rates compared to the other two species in well-watered conditions. Vapor pressure gradient correlated with stomatal conductance, net assimilation and transpiration, but the association between stomatal conductance and sap flow was weak. The environmental variables more strongly associated with sap flow were solar radiation and reference evapo-transpiration, especially in the well-watered plants, but those associations were weaker in the stressed plants. All three pine species showed the isohydric, drought-avoiding strategy common in the genus Pinus, maintaining relatively high water potentials in dry conditions. Nevertheless, P. halepensis showed a water-saving strategy, with a stomatal closure behavior under drought. Stomatal regulation was less strict in P. sylvestris, closer to a water-spending pattern, while P. pinea showed an intermediate behavior. Significant differences were recorded among species in spectral reflectance in the visible and infra-red regions. Photochemical Reflectance Index, Normalized Difference Vegetation Index and combinations of other ratios permitted the discrimination among the three pine species. These spectral variables showed association with sap flow rate, water potential and leaflevel gas exchange variables. Both cluster analysis and k-means classification discriminated Scots pine and Aleppo pine in two different groups. On the other hand, Stone pine showed differences in spectral behavior depending on the hydric status of the plants. Well-watered Stone pine plants had the same spectral behavior as Scots pine, while the plants subjected to drought stress were closer to Aleppo pine plants in spectral response. These findings may help to quantify the impacts of early and mid-summer water deficit on Mediterranean pines in future climate regimes.
dc.description.departmentDepto. de Genética, Fisiología y Microbiología
dc.description.facultyFac. de Ciencias Biológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.sponsorshipMinisterio de Educación y Ciencia (MEC)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/43935
dc.identifier.doi10.3832/ifor1748-009
dc.identifier.issn1971-7458
dc.identifier.officialurlhttp://www.sisef.it/iforest/static/?id=policy
dc.identifier.urihttps://hdl.handle.net/20.500.14352/23400
dc.journal.titleiForest
dc.language.isoeng
dc.page.final214
dc.page.initial204
dc.publisherthe Italian Society of Silviculture and Forest Ecology (SISEF)
dc.relation.projectIDFIT330221200610
dc.relation.projectIDAGL-2010- 17505
dc.rightsAtribución-NoComercial 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by-nc/3.0/es/
dc.subject.cdu58
dc.subject.cdu581.1
dc.subject.cdu582.47
dc.subject.keywordCarbon Assimilation
dc.subject.keywordAleppo Pine
dc.subject.keywordHydric Relations
dc.subject.keywordReflectance
dc.subject.keywordScots Pine
dc.subject.keywordStone Pine
dc.subject.keywordTranspiration
dc.subject.ucmBiología
dc.subject.ucmBotánica (Biología)
dc.subject.ucmFisiología vegetal (Biología)
dc.subject.unesco24 Ciencias de la Vida
dc.subject.unesco2417.03 Botánica General
dc.subject.unesco2417.19 Fisiología Vegetal
dc.titleSap flow, leaf-level gas exchange and spectral responses to drought in Pinus sylvestris, Pinus pinea and Pinus halepensis
dc.typejournal article
dc.volume.number10
dspace.entity.typePublication
relation.isAuthorOfPublicationeca25560-c1a6-416e-b52c-78e4e5d4f878
relation.isAuthorOfPublication962672dc-8717-4d6d-87a0-c6be3c6f1d4d
relation.isAuthorOfPublication.latestForDiscoveryeca25560-c1a6-416e-b52c-78e4e5d4f878
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