It Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate

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datacite.alternateIdentifier.citationFrontiers in Plant Science, 11, 2020
datacite.alternateIdentifier.doi10.3389/fpls.2020.01178
datacite.alternateIdentifier.issn1664-462X
datacite.creatorPerera-Castro, Alicia Victoria
datacite.creatorWaterman, Melinda J.
datacite.creatorTurnbull, Johanna D.
datacite.creatorAshcroft, Michael B.
datacite.creatorMcKinley, Ella
datacite.creatorWatling, Jennifer R.
datacite.creatorBramley-Alves, Jessica
datacite.creatorCasanova-Katny, Angélica
datacite.creatorZúñiga, Gustavo E.
datacite.creatorFlexas, Jaume
datacite.date2020
datacite.rightsAcceso abierto
datacite.subjectAntarctica
datacite.subjectBryophytes
datacite.subjectCarbon Balance
datacite.subjectElectron Transport Rate
datacite.subjectMesophyll Conductance
datacite.subjectNet Co2 Assimilation
datacite.subjectNon-photochemical Quenching
datacite.subjectRespiration
datacite.titleIt Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate
dc.contributor.authorCASANOVA KATNY, MARIA ANGELICA
dc.description.abstractThe terrestrial flora of Antarctica s frozen continent is restricted to sparse ice-free areas and dominated by lichens and bryophytes. These plants frequently battle sub-zero temperatures, extreme winds and reduced water availability; all influencing their ability to survive and grow. Antarctic mosses, however, can have canopy temperatures well above air temperature. At midday, canopy temperatures can exceed 15°C, depending on moss turf water content. In this study, the optimum temperature of photosynthesis was determined for six Antarctic moss species: Bryum pseudotriquetrum, Ceratodon purpureus, Chorisodontium aciphyllum, Polytrichastrum alpinum, Sanionia uncinata, and Schistidium antarctici collected from King George Island (maritime Antarctica) and/or the Windmill Islands, East Antarctica. Both chlorophyll fluorescence and gas exchange showed maximum values of electron transport rate occurred at canopy temperatures higher than 20°C. The optimum temperature for both net assimilation of CO<inf>2</inf> and photoprotective heat dissipation of three East Antarctic species was 20 30°C and at temperatures below 10°C, mesophyll conductance did not significantly differ from 0. Maximum mitochondrial respiration rates occurred at temperatures higher than 35°C and were lower by around 80% at 5°C. Despite the extreme cold conditions that Antarctic mosses face over winter, the photosynthetic apparatus appears optimised to warm temperatures. Our estimation of the total carbon balance suggests that survival in this cold environment may rely on a capacity to maximize photosynthesis for brief periods during summer and minimize respiratory carbon losses in cold conditions. © 2020 Elsevier B.V., All rights reserved.
dc.description.ia_keywordtemperatures, antarctic, temperature, cold, antarctica, mosses, canopy
dc.formatPDF
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/3996
dc.language.isoen
dc.publisherFrontiers Media
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.sourceFrontiers in Plant Science
dc.subject.ia_odsODS 13: Acción por el clima
dc.subject.ia_oecd1nCiencias Naturales
dc.subject.ia_oecd2nCiencias Biológicas
dc.subject.ia_oecd3nCiencias del Medio Ambiente
dc.type.driverinfo:eu-repo/semantics/article
dc.type.driverhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
oaire.citationEdition2020
oaire.citationTitleFrontiers in Plant Science
oaire.citationVolume11
oaire.fundingReferenceANID FONDECYT 1181745 (Regular)
oaire.fundingReferenceINACH RT2716
oaire.fundingReferenceSpanish MECD FPU-02054 (España)
oaire.licenseConditionObra bajo licencia Creative Commons Atribución 4.0 Internacional
oaire.licenseCondition.urihttps://creativecommons.org/licenses/by/4.0/
oaire.resourceTypeArtículo
oaire.resourceType.enArticle
relation.isAuthorOfPublicationa9399b7c-ca2e-4330-b761-690bd7ef26d8
relation.isAuthorOfPublication.latestForDiscoverya9399b7c-ca2e-4330-b761-690bd7ef26d8
uct.catalogadorjvu
uct.comunidadRecursos Naturalesen_US
uct.departamentoDepartamento de Ciencias Ambientales
uct.facultadFacultad de Recursos Naturales
uct.indizacionScience Citation Index Expanded - SCIE
uct.indizacionSCOPUS
uct.indizacionWOS
uct.indizacionDOAJ
uct.indizacionPubMed
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