Minimum Leaf Conductance (gmin) Is Higher in the Treeline of Pinus uncinata Ram. in the Pyrenees: Michaelis’ Hypothesis Revisited

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dc.bibliographicCitation.titleFrontiers in Plant Scienceen
dc.bibliographicCitation.volume12es_ES
dc.contributor.authorBueno, Amauries_ES
dc.contributor.authorAlonso Forn, Davides_ES
dc.contributor.authorPeguero Pina, José Javieres_ES
dc.contributor.authorDe Souza, Aline Xavieres_ES
dc.contributor.authorFerrio Díaz, Juan Pedroes_ES
dc.contributor.authorSancho Knapik, Domingoes_ES
dc.contributor.authorGil Pelegrín, Eustaquioes_ES
dc.coverage.spatialPirineoses_ES
dc.coverage.spatialSistemas Agrícolas, Forestales y Medio Ambiente - SAFMAes_ES
dc.date.accessioned2022-01-26T10:48:15Z
dc.date.available2022-01-26T10:48:15Z
dc.date.issued2022es_ES
dc.description.abstractThe search for a universal explanation of the altitudinal limit determined by the alpine treeline has given rise to different hypotheses. In this study, we revisited Michaelis’ hypothesis which proposed that an inadequate “ripening” of the cuticle caused a greater transpiration rate during winter in the treeline. However, few studies with different explanations have investigated the role of passive mechanisms of needles for protecting against water loss during winter in conifers at the treeline. To shed light on this, the cuticular transpiration barrier was studied in the transition from subalpine Pinus uncinata forests to alpine tundra at the upper limit of the species in the Pyrenees. This upper limit of P. uncinata was selected here as an example of the ecotones formed by conifers in the temperate mountains of the northern hemisphere. Our study showed that minimum leaf conductance in needles from upper limit specimens was higher than those measured in specimens living in the lower levels of the sub-alpine forest and also displayed lower cuticle thickness values, which should reinforce the seminal hypothesis by Michaelis. Our study showed clear evidence that supports the inadequate development of needle cuticles as one of the factors that lead to increased transpirational water losses during winter and, consequently, a higher risk of suffering frost drought.en
dc.description.statusPublishedes_ES
dc.identifier.citationFrontiers in Plant Science, vol. 12, (2022)
dc.identifier.urihttp://hdl.handle.net/10532/5723
dc.language.isoenes_ES
dc.relation.doi10.3389/fpls.2021.786933es_ES
dc.relation.urihttps://www.frontiersin.org/article/10.3389/fpls.2021.786933es_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subject.agrovocPinus uncinataes
dc.subject.agrovocConductancia foliares
dc.titleMinimum Leaf Conductance (gmin) Is Higher in the Treeline of Pinus uncinata Ram. in the Pyrenees: Michaelis’ Hypothesis Revisiteden
dc.typeJournal Contribution*
dc.type.refereedRefereedes_ES
dc.type.specifiedArticlees_ES

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