Melatonin-Mediated Modulation of Polyamines Enhances Drought Tolerance in Foxtail Millet (Setaria italica L.).

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Melatonin-Mediated Modulation of Polyamines Enhances Drought Tolerance in Foxtail Millet (Setaria italica L.).
Συγγραφείς: Shi Q; Special Orphan Crops Research Center of the Loess Plateau, MARA, College of Life Sciences, Shanxi Agricultural University, Taigu, Shanxi, China.; College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China., Wang G; College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China., Zhang T; College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China., Zhao Y; College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China., Meng F; College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China., Feng K; College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China., Yang X; Special Orphan Crops Research Center of the Loess Plateau, MARA, College of Life Sciences, Shanxi Agricultural University, Taigu, Shanxi, China., Zhao J; College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China., Yuan X; College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China., Ren J; Special Orphan Crops Research Center of the Loess Plateau, MARA, College of Life Sciences, Shanxi Agricultural University, Taigu, Shanxi, China.
Πηγή: Journal of pineal research [J Pineal Res] 2026 Jul; Vol. 78 (4), pp. e70157.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Wiley Country of Publication: England NLM ID: 8504412 Publication Model: Print Cited Medium: Internet ISSN: 1600-079X (Electronic) Linking ISSN: 07423098 NLM ISO Abbreviation: J Pineal Res Subsets: MEDLINE
Imprint Name(s): Publication: : Oxford : Wiley
Original Publication: New York : Liss, c1984-
Ιατρικοί όροι (MeSH): Melatonin*/pharmacology , Melatonin*/metabolism , Polyamines*/metabolism , Setaria Plant*/metabolism , Setaria Plant*/drug effects , Drought Resistance*, Plant Proteins/metabolism ; Plant Roots/metabolism ; Stress, Physiological/drug effects
Περίληψη: Melatonin have been proposed as a potential alternative in enhancing drought tolerance. However, the mechanisms underlying remain poorly understood. This study tested the hypothesis that melatonin improves drought tolerance by regulating polyamine metabolism. Hydroponically grown foxtail millet (Setaria italica L.) seedlings were subjected to drought stress induced by polyethylene glycol (PEG-6000, 10%), with or without melatonin application. The results showed that exogenous melatonin improved drought tolerance by improving water uptake, increasing root hydraulic conductivity (Lpr) and whole-plant hydraulic conductance (Kplant) by 37% and 33%, respectively. Melatonin also significantly increased the activities of key enzymes involved in polyamine biosynthesis, specifically arginine decarboxylase (ADC), ornithine decarboxylase (ODC), and S-adenosyl-l-methionine decarboxylase (SAMDC), while concurrently decreasing the activities of polyamine degrading enzymes, namely polyamine oxidase (PAO) and diamine oxidase (DAO). Additionally, melatonin elevated the levels of putrescine (Put), spermidine (Spd), and spermine (Spm) in both roots and leaves. Transcriptome analysis further indicated that melatonin upregulated genes related to polyamine biosynthesis. To further verify the role of polyamines in melatonin-induced drought tolerance, seedlings were treated with exogenous Spd or a polyamine biosynthesis inhibitor (dicyclohexylammonium sulfate, DCHA) under combined drought and melatonin conditions. Exogenous Spd produced effects similar to those of melatonin under drought stress, while DCHA abolished the melatonin-induced drought tolerance and reduced its beneficial effects on root water absorption. These findings demonstrate that polyamines are involved in melatonin-induced drought tolerance in foxtail millet, supporting the positive role of melatonin in modulating drought tolerance.
(© 2026 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)
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Grant Information: 2021YFD1901103-5 National Key Research and Development Program of China; CARS-06-14.5-A28 National Millet and Sorghum Industry Technical System Project; 2025M774011 China Postdoctoral Science Foundation; 202303021212107 Fundamental Research Program of Shanxi Province; 2023BQ01 Research Funds for the Doctoral Program of Shanxi Agriculture University; 2025SJ178 Postgraduate Education Innovation Program of Shanxi Province
Contributed Indexing: Keywords: aquaporin; drought stress; melatonin; polyamine; root hydraulic conductance
Substance Nomenclature: JL5DK93RCL (Melatonin)
0 (Plant Proteins)
0 (Polyamines)
Entry Date(s): Date Created: 20260610 Date Completed: 20260613 Latest Revision: 20260622
Update Code: 20260623
DOI: 10.1111/jpi.70157
PMID: 42267978
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1600-079X
DOI:10.1111/jpi.70157