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

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dc.contributor.authorSanchez Campos, Yissel
dc.contributor.authorCarcamo Fincheira, Paz
dc.contributor.authorGonzalez Villagra, Jorge
dc.contributor.authorJorquera Fontena, Emilio
dc.contributor.authorAcevedo, Patricio
dc.contributor.authorSoto Cerda, Braulio
dc.contributor.authorNunes Nesi, Adriano
dc.contributor.authorInostroza Blancheteau, Claudio
dc.contributor.authorTighe Neira, Ricardo
dc.date2023
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.citationPROTOPLASMA,Vol.,2023
dc.identifier.doi10.1007/s00709-023-01868-0
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/5366
dc.language.isoen
dc.publisherSPRINGER WIEN
dc.sourcePROTOPLASMA
dc.subject.englishPhotosynthesis
dc.subject.englishTitanium dioxide
dc.subject.englishGene expression
dc.subject.englishAntioxidant system
dc.titlePhysiological and molecular effects of TiO2 nanoparticle application on UV-A radiation stress responses in Solanum lycopersicum L.
uct.indizacionSCI
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