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Antioxidants
Volume 14
Issue 8
10.3390/antiox14080917
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Effect of Exogenous Melatonin Supply on Potato Plants Grown In Vitro

by
Andrea Kun-Nemes
1,
Dóra Farkas
2,
Emese Szilágyi-Tolnai
1,
Mónika Éva Fazekas
1,
Melinda Paholcsek
1,
László Stündl
3,
Piroska Bíróné Molnár
1,
Zoltán Cziáky
4,
Judit Dobránszki
2,* and
Judit Gálné Remenyik
1,*
1
Complex Systems and Microbiome-Innovations Centre, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, 4032 Debrecen, Hungary
2
Centre for Agricultural Genomics and Biotechnology, Faculty of the Agricultural and Food Science and Environmental Management, University of Debrecen, 4400 Nyíregyháza, Hungary
3
Institute of Food Technology, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, 4032 Debrecen, Hungary
4
Agricultural and Molecular Research and Service Group, Institute of Technical and Agricultural Sciences, University of Nyíregyháza, 4400 Nyíregyháza, Hungary
*
Authors to whom correspondence should be addressed.
Antioxidants 2025, 14(8), 917; https://doi.org/10.3390/antiox14080917
Submission received: 16 May 2025 / Revised: 15 July 2025 / Accepted: 18 July 2025 / Published: 25 July 2025
(This article belongs to the Special Issue Free-Radical Scavenging and Antioxidant Properties of Melatonin, 2nd Edition)
Versions Notes

Abstract

Plant growth regulators of natural origin are becoming increasingly important in crop production to protect plants against various abiotic stresses and often to modulate plant pathological processes. These compounds offer the potential to enhance plant health exogenously by protecting plants against oxidative stress. Melatonin has been studied previously; however, the role of exogenous melatonin in abiotic stress tolerance and the underlying mechanisms are still less understood. In this study, potato plants were grown in vitro to study the effects of exogenous melatonin and ultrasound treatment (latter as an abiotic stress). The measured parameters included morphological data and the concentrations of melatonin and its degradation products, indole-3-acetic acid and salicylic acid, at 0 h, 24 h, 1 week, and 4 weeks after treatment. In addition, the expression levels of the genes responsible for the production of enzymes involved in melatonin synthesis were traced by RT-qPCR analysis. Melatonin added to the culture medium was taken up by the in vitro plantlets, and it participated both in the plant stress reaction and stress mitigation when an abiotic stress reaction was triggered by ultrasound. Among the degradation products, we detected N-acetyl-5-methoxykynuramine, 6-hydroxymelatonin, and 5-methoxytryptamine by UHPLC-MS. Among the enzymes involved in the synthesis of melatonin and indole-3-acetic acid, the expression levels of COMT, SNAT, TSB, TAA, ASMT, TPH, AANAT, ASMT, and TSA were measured and no pattern was observed in response to the treatments.
Keywords: exogenous melatonin; abiotic stress; degradation products of melatonin; potato; indole-3-acetic acid; salicylic acid exogenous melatonin; abiotic stress; degradation products of melatonin; potato; indole-3-acetic acid; salicylic acid

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MDPI and ACS Style

Kun-Nemes, A.; Farkas, D.; Szilágyi-Tolnai, E.; Fazekas, M.É.; Paholcsek, M.; Stündl, L.; Bíróné Molnár, P.; Cziáky, Z.; Dobránszki, J.; Remenyik, J.G. Effect of Exogenous Melatonin Supply on Potato Plants Grown In Vitro. Antioxidants 2025, 14, 917. https://doi.org/10.3390/antiox14080917

AMA Style

Kun-Nemes A, Farkas D, Szilágyi-Tolnai E, Fazekas MÉ, Paholcsek M, Stündl L, Bíróné Molnár P, Cziáky Z, Dobránszki J, Remenyik JG. Effect of Exogenous Melatonin Supply on Potato Plants Grown In Vitro. Antioxidants. 2025; 14(8):917. https://doi.org/10.3390/antiox14080917

Chicago/Turabian Style

Kun-Nemes, Andrea, Dóra Farkas, Emese Szilágyi-Tolnai, Mónika Éva Fazekas, Melinda Paholcsek, László Stündl, Piroska Bíróné Molnár, Zoltán Cziáky, Judit Dobránszki, and Judit Gálné Remenyik. 2025. "Effect of Exogenous Melatonin Supply on Potato Plants Grown In Vitro" Antioxidants 14, no. 8: 917. https://doi.org/10.3390/antiox14080917

APA Style

Kun-Nemes, A., Farkas, D., Szilágyi-Tolnai, E., Fazekas, M. É., Paholcsek, M., Stündl, L., Bíróné Molnár, P., Cziáky, Z., Dobránszki, J., & Remenyik, J. G. (2025). Effect of Exogenous Melatonin Supply on Potato Plants Grown In Vitro. Antioxidants, 14(8), 917. https://doi.org/10.3390/antiox14080917

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