Nanostructured TiO2-induced photocatalytic stress enhances the antioxidant capacity and phenolic content in the leaves of Vitis vinifera on a genotype-dependent manner

L. Kõrösi, Sakina Bouderias, Kristóf Csepregi, Balázs Bognár, Péter Teszlák, Alice Scarpellini, Andrea Castelli, É. Hideg, G. Jakab

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Over the past decades, nanotechnology has received great attention and brought revolutionary solutions for a number of challenges in scientific fields. Industrial, agricultural and medical applications of engineered nanomaterials have increased intensively. The ability of titanium dioxide nanoparticles (TiO2 NPs) to produce reactive oxygen species (ROS), when excited by ultra-violet (UV) light, makes them useful for effectively inactivate various pathogens. It is known that ROS also have signalling role in living organisms, therefore, TiO2 NPs-induced ROS can influence both enzymatic and non-enzymatic defence systems, and could play a role in the resistance of plants to pathogens. Herein, we studied the photocatalytic stress responses of grapevine (Vitis vinifera L.) as model plant, when exposed to a well-known photocatalyst, Degussa P25 TiO2 NPs. The photocatalytically produced ROS such as superoxide anion, hydroxyl radical and singlet oxygen were confirmed by electron paramagnetic resonance spectroscopy. Foliar exposure of five red cultivars (Cabernet sauvignon, Cabernet franc, Merlot, Kékfrankos and Kadarka) was carried out in blooming phenophase under field condition where plants are exposed to natural sunlight with relatively high UV radiation (with a maximum of ~ 45 W m−2). After two weeks of exposure, the effects of photogenerated ROS on the total phenolic content, antioxidant capacity, flavonol profile and the main macro-, microelements of the leaves were studied in detail. We found that foliar application of TiO2 NPs boosted the total phenolic content and biosynthesis of the leaf flavonols depending on the grapevine variety. Photocatalytically active TiO2 NPs also increased K, Mg, Ca, B and Mn levels in the leaves as shown by ICP-AES measurements.

Original languageEnglish
Pages (from-to)137-145
Number of pages9
JournalJournal of Photochemistry and Photobiology B: Biology
Volume190
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Vitis
antioxidants
leaves
Reactive Oxygen Species
Antioxidants
Genotype
oxygen
pathogens
ultraviolet radiation
Flavonols
Singlet Oxygen
Nanotechnology
Nanostructures
Sunlight
Electron Spin Resonance Spectroscopy
biosynthesis
Superoxides
inorganic peroxides
Hydroxyl Radical
Nanoparticles

Keywords

  • Antioxidant capacity
  • Flavonols
  • Grape leaf polyphenols
  • Micro- and macroelements
  • Photocatalytic stress

ASJC Scopus subject areas

  • Radiation
  • Radiological and Ultrasound Technology
  • Biophysics
  • Radiology Nuclear Medicine and imaging

Cite this

Nanostructured TiO2-induced photocatalytic stress enhances the antioxidant capacity and phenolic content in the leaves of Vitis vinifera on a genotype-dependent manner. / Kõrösi, L.; Bouderias, Sakina; Csepregi, Kristóf; Bognár, Balázs; Teszlák, Péter; Scarpellini, Alice; Castelli, Andrea; Hideg, É.; Jakab, G.

In: Journal of Photochemistry and Photobiology B: Biology, Vol. 190, 01.01.2019, p. 137-145.

Research output: Contribution to journalArticle

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AU - Teszlák, Péter

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