Tryfon, P;
Kamou, NN;
Mourdikoudis, S;
Karamanoli, K;
Menkissoglu-Spiroudi, U;
Dendrinou-Samara, C;
(2021)
Cuzn and zno nanoflowers as nano-fungicides against botrytis cinerea and sclerotinia sclerotiorum: Phytoprotection, translocation, and impact after foliar application.
Materials
, 14
(24)
, Article 7600. 10.3390/ma14247600.
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Abstract
Inorganic nanoparticles (INPs) have dynamically emerged in plant protection. The uptake of INPs by plants mostly depends on the size, chemical composition, morphology, and the type of coating on their surface. Herein, hybrid ensembles of glycol-coated bimetallic CuZn and ZnO nanoparticles (NPs) have been solvothermally synthesized in the presence of DEG and PEG, physicochemically characterized, and tested as nano-fungicides. Particularly, nanoflowers (NFs) of CuZn@DEG and ZnO@PEG have been isolated with crystallite sizes 40 and 15 nm, respectively. Organic coating DEG and PEG (23% and 63%, respectively) was found to protect the NFs formation effectively. The CuZn@DEG and ZnO@PEG NFs revealed a growth inhibition of phytopathogenic fungi Botrytis cinerea and Sclerotinia sclerotiorum in a dose-dependent manner with CuZn@DEG NFs being more efficient against both fungi with EC50 values of 418 and 311 µg/mL respectively. Lettuce (Lactuca sativa) plants inoculated with S. sclerotiorum were treated with the NFs, and their antifungal effect was evaluated based on a disease index. Plants sprayed with ZnO@PEG NFs showed a rela-tively higher net photosynthetic (4.70 µmol CO2 m−2 s−1 ) and quantum yield rate (0.72) than with CuZn@DEG NFs (3.00 µmol CO2 m−2 s−1 and 0.68). Furthermore, the penetration of Alizarin Red S-labeled NFs in plants was investigated. The translocation from leaves to roots through the stem was evident, while ZnO@PEG NFs were mainly trapped on the leaves. In all cases, no phytotoxicity was observed in the lettuce plants after treatment with the NFs.
| Type: | Article |
|---|---|
| Title: | Cuzn and zno nanoflowers as nano-fungicides against botrytis cinerea and sclerotinia sclerotiorum: Phytoprotection, translocation, and impact after foliar application |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/ma14247600 |
| Publisher version: | https://doi.org/10.3390/ma14247600 |
| Language: | English |
| Additional information: | This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited |
| Keywords: | Bimetallic CuZn nanoflowers; ZnO nanoflowers; nano-pesticides; phytopathogenic fungi; plant protection |
| 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.ucl.ac.uk/id/eprint/10141301 |
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