Tryfon, Panagiota;
Sperdouli, Ilektra;
Adamakis, Ioannis-Dimosthenis S;
Mourdikoudis, Stefanos;
Moustakas, Michael;
Dendrinou-Samara, Catherine;
(2023)
Impact of Coated Zinc Oxide Nanoparticles on Photosystem II of Tomato Plants.
Materials
, 16
(17)
, Article 5846. 10.3390/ma16175846.
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Abstract
Zinc oxide nanoparticles (ZnO NPs) have emerged as a prominent tool in agriculture. Since photosynthetic function is a significant measurement of phytotoxicity and an assessment tool prior to large-scale agricultural applications, the impact of engineered irregular-shaped ZnO NPs coated with oleylamine (ZnO@OAm NPs) were tested. The ZnO@OAm NPs (crystalline size 19 nm) were solvothermally prepared in the sole presence of oleylamine (OAm) and evaluated on tomato (Lycopersicon esculentum Mill.) photosystem II (PSII) photochemistry. Foliar-sprayed 15 mg L−1 ZnO@OAm NPs on tomato leaflets increased chlorophyll content that initiated a higher amount of light energy capture, which resulted in about a 20% increased electron transport rate (ETR) and a quantum yield of PSII photochemistry (ΦPSII) at the growth light (GL, 600 μmol photons m−2 s−1). However, the ZnO@OAm NPs caused a malfunction in the oxygen-evolving complex (OEC) of PSII, which resulted in photoinhibition and increased ROS accumulation. The ROS accumulation was due to the decreased photoprotective mechanism of non-photochemical quenching (NPQ) and to the donor-side photoinhibition. Despite ROS accumulation, ZnO@OAm NPs decreased the excess excitation energy of the PSII, indicating improved PSII efficiency. Therefore, synthesized ZnO@OAm NPs can potentially be used as photosynthetic biostimulants for enhancing crop yields after being tested on other plant species.
| Type: | Article |
|---|---|
| Title: | Impact of Coated Zinc Oxide Nanoparticles on Photosystem II of Tomato Plants |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/ma16175846 |
| Publisher version: | https://doi.org/10.3390/ma16175846 |
| Language: | English |
| Additional information: | © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | nanoagrochemicals; inorganic nanoparticles; chlorophyll fluorescence; photoinhibition; photoprotection; electron transport rate; reactive oxygen species; effective quantum yield of PSII photochemistry (ΦPSII); maximum photochemistry (Fv/Fm) |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10176349 |
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