Physiological and molecular effects of TiO2 nanoparticle application on UV-A radiation stress responses in Solanum lycopersicum L.

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datacite.alternateIdentifier.citationPROTOPLASMA,Vol.,2023
datacite.alternateIdentifier.doi10.1007/s00709-023-01868-0
datacite.creatorSanchez Campos, Yissel
datacite.creatorCarcamo Fincheira, Paz
datacite.creatorGonzalez Villagra, Jorge
datacite.creatorJorquera Fontena, Emilio
datacite.creatorAcevedo, Patricio
datacite.creatorSoto Cerda, Braulio
datacite.creatorNunes Nesi, Adriano
datacite.creatorInostroza Blancheteau, Claudio
datacite.creatorTighe Neira, Ricardo
datacite.date2023
datacite.subject.englishPhotosynthesis
datacite.subject.englishTitanium dioxide
datacite.subject.englishGene expression
datacite.subject.englishAntioxidant system
datacite.titlePhysiological and molecular effects of TiO2 nanoparticle application on UV-A radiation stress responses in Solanum lycopersicum L.
dc.date.accessioned2023-06-27T13:13:32Z
dc.date.available2023-06-27T13:13:32Z
dc.description.abstractNanoparticles (NPs) of titanium dioxide (TiO2) alter photosynthetic and biochemical parameters in Solanum lycopersicum L., possibly due to their photocatalytic properties given by energy absorption in the UV-A range; however, the joint effects TiO2 NPs and UV-A radiation are not well understood. This work evaluates the combined responses of TiO2 NPs and UV-A radiation at the physiological and molecular levels in S. lycopersicum. In a split growth chamber, the presence (UV-A +) and absence (UV-A -) of UV-A were combined with 0 (water as a control), and 1000 and 2000 mg L-1 of TiO2 NPs applied at sowing. At the end of exposure (day 30 after sowing), the photosynthetic performance was determined, and biochemical and molecular parameters were evaluated in leaf tissues. Better photochemical performance in UV-A + than UV-A - in control plants was observed, but these effects decreased in 1000 and 2000 mg TiO2 L-1, similar to net CO2 assimilation. A clear increase in photosynthetic pigment levels was recorded under UV-A + compared to UV-A - that was positively correlated with photosynthetic parameters. A concomitant increase in total phenols was observed on adding TiO2 in UV-A - conditions, while a decreasing trend in lipid peroxidation was observed for the same treatments. There was an increase in psbB gene expression under TiO2/UV-A + treatments, and a reduced expression of rbcS and rbcL under UV-A - . These results suggest that the reduction in photosynthetic performance on applying high doses of TiO2 NPs is probably due to biochemical limitation, while UV-A achieves the same result via the photochemical component.
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/5366
dc.language.isoen
dc.publisherSPRINGER WIEN
dc.sourcePROTOPLASMA
uct.indizacionSCI
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