Short-term UV-B radiation affects photosynthetic performance and antioxidant gene expression in highbush blueberry leaves

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datacite.alternateIdentifier.citationPLANT PHYSIOLOGY AND BIOCHEMISTRY,Vol.107,301-309,2016
datacite.alternateIdentifier.doi10.1016/j.plaphy.2016.06.019
datacite.creatorInostroza Blancheteau, Claudio
datacite.creatorAcevedo, Patricio
datacite.creatorLoyola, Rodrigo
datacite.creatorArce Johnson, Patricio
datacite.creatorAlberdi, Miren
datacite.creatorReyes Diaz, Marjorie
datacite.date2016
datacite.subject.englishUV-B radiation
datacite.subject.englishHighbush blueberry
datacite.subject.englishPhotochemical parameters
datacite.subject.englishRadical scavenging activity
datacite.subject.englishAntioxidant gene expression
datacite.titleShort-term UV-B radiation affects photosynthetic performance and antioxidant gene expression in highbush blueberry leaves
dc.date.accessioned2021-04-30T17:04:12Z
dc.date.available2021-04-30T17:04:12Z
dc.description.abstractThe impact of increased artificial UV-B radiation on photosynthetic performance, antioxidant and SOD activities and molecular antioxidant metabolism responses in leaves of two highbush blueberry (Vaccinium corymbosum L. cv. Brigitta and Bluegold) genotypes was studied. Plants were grown in a solid substrate and exposed to 0, 0.07, 0.12 and 0.19 W m(-2) of biologically-effective UV-B irradiance for 0 -72 h. Our findings show that net photosynthesis (Pn) decreased significantly in Bluegold, accompanied by a reduction in the effective quantum yield (phi PSII) and electron transport rate (ETR), especially at the highest UV-B irradiation. On the other hand, Brigitta showed a better photosynthetic performance, as well as a clear increment in the antioxidant activity response that could be associated with increased superoxide dismutase activity (SOD) in the early hours of induced UV-B stress in all treatments. At the molecular level, the expression of the three antioxidant genes evaluated in both genotypes had a similar tendency. However, ascorbate peroxidase (APX) expression was significantly increased (6-fold) in Bluegold compared to Brigitta. Thus, the reduction of Pn concomitant with a lower photochemical performance and a reduced response of antioxidant metabolism suggest that the Bluegold genotype is more sensitive to UV-B radiation, while Brigitta appears to tolerate better moderate UV-B irradiance in a short-term experiment. (C) 2016 Elsevier Masson SAS. All rights reserved.
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3882
dc.language.isoen
dc.publisherELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
dc.sourcePLANT PHYSIOLOGY AND BIOCHEMISTRY
oaire.resourceTypeArticle
uct.catalogadorWOS
uct.indizacionSCI
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