Hydraulic and Photosynthetic Performance of Antarctic Plants Under Successive Freeze-Thaw Cycles

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dc.bibliographicCitation.titlePlant, Cell & Environmenten
dc.contributor.authorVallejos, Valentinaes_ES
dc.contributor.authorFuentes, Franciscaes_ES
dc.contributor.authorSancho Knapik, Domingoes_ES
dc.contributor.authorGago, Jorgees_ES
dc.contributor.authorRamírez, Constanza Fes_ES
dc.contributor.authorRivera, Betsy Kes_ES
dc.contributor.authorCavieres, Lohengrin Aes_ES
dc.contributor.authorGalmes, Jeronies_ES
dc.contributor.authorPeguero Pina, José Javieres_ES
dc.contributor.authorGil Pelegrín, Eustaquioes_ES
dc.contributor.authorSáez, Patricia Les_ES
dc.coverage.spatialZona antárticaes_ES
dc.date.accessioned2025-05-02T13:00:09Z
dc.date.available2025-05-02T13:00:09Z
dc.date.issued2025es_ES
dc.date.updated2025-05-02T12:25:04Z
dc.description.abstractClimate change projections predict warming and increased weather variability, mainly in polar regions, altering freeze-thaw patterns. However, the effects of rising temperatures and more frequent freeze-thaw events on the water and CO2 management of Antarctic plants remain unclear. To address this, we conducted a laboratory experiment to investigate how growth temperature (5 degrees C and 15 degrees C) and successive freeze-thaw cycles influence the hydraulic and photosynthetic performance of Deschampsia antarctica (D. antarctica) and Colobanthus quitensis (C. quitensis). Our results showed that warmer conditions improved hydraulic and photosynthetic performance in both species, driven by anatomical adjustments in leaf xylem vessels. Additionally, plants exposed to successive freeze-thaw cycles exhibited a coordinated decline in whole-plant hydraulic conductivity and leaf gas exchange, regardless of growth temperature. The magnitude of changes (%) in photosynthetic traits after freeze-thaw cycles varied between species, with D. antarctica showing similar responses at both growth temperatures, while C. quitensis experienced more pronounced changes at the lower temperature. Overall, these findings suggest that while Antarctic plants benefit from warmer temperatures, repeated freeze-thaw events could disrupt their hydraulic balance and limit photosynthesis, particularly under natural environmental conditions.en
dc.description.sponsorshipEste trabajo fue apoyado por la Agencia Nacional de Investigación y Desarrollo (ANID) a través de los proyectos FONDECYT 1211231, ANILLO ACT-210038, EQM-210094, FB-210006, y el Instituto Antártico Chileno a través de los proyectos INACH RT_13-16 e INACH DG_09-21.es_ES
dc.description.statusPublishedes_ES
dc.identifier.citationVallejos, V., Fuentes, F., Sancho-Knapik, D., Gago, J., Ramírez, C. F., Rivera, B. K., Cavieres, L. A., Galmés, J., Peguero-Pina, J. J., Gil-Pelegrín, E., & Sáez, P. L. (2025). Hydraulic and Photosynthetic Performance of Antarctic Plants Under Successive Freeze–Thaw Cycles. Plant, Cell & Environment, n/a(n/a). https://doi.org/10.1111/pce.15528
dc.identifier.issn13653040
dc.identifier.urihttp://hdl.handle.net/10532/7597
dc.language.isoeses_ES
dc.relation.doihttps://doi.org/10.1111/pce.15528es_ES
dc.relation.urihttps://doi.org/10.1111/pce.15528es_ES
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivs 4.0es_ES
dc.subject.agrovocDeschampsiaen
dc.subject.agrovocCaryophyllaceaeen
dc.subject.agrovocAdaptación al cambio climáticoen
dc.subject.agrovocCongelaciónen
dc.subject.agrovocDescongelaciónen
dc.subject.agrovocFotosíntesisen
dc.subject.agrovocZona antárticaen
dc.subject.otherAdaptación Al Cambio Climático
dc.subject.otherANTARCTIC VASCULAR PLANTS
dc.subject.otherCaryophyllaceae
dc.subject.otherCavitation
dc.subject.otherClimate Change
dc.subject.otherColobanthus quitensis
dc.subject.otherCongelación
dc.subject.otherDeschampsia
dc.subject.otherDeschampsia antarctica
dc.subject.otherDescongelación
dc.subject.otherDROUGH
dc.subject.otherFotosíntesis
dc.subject.otherfreeze-thaw cycles
dc.subject.otherHydraulics
dc.subject.otherInduced Embolism
dc.subject.otherleaf anatomy
dc.subject.otherMesophyll conductance
dc.subject.otherphotosynthesi
dc.subject.otherPLASMA-MEMBRANE AQUAPORINS
dc.subject.otherStomatal conductance
dc.subject.otherVascular Plants
dc.subject.otherWater relations
dc.subject.otherXylem
dc.subject.otherZona antártica
dc.titleHydraulic and Photosynthetic Performance of Antarctic Plants Under Successive Freeze-Thaw Cyclesen
dc.typeJournal Contribution*
dc.type.refereedRefereedes_ES
dc.type.specifiedArticlees_ES

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