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Phytomelatonin: an unexpected molecule with amazing performances in plants
Marino B Arnao1, Antonio Cano1, Josefa Hernández-Ruiz1
1Department of Plant Biology (Plant Physiology), Faculty of Biology, University of Murcia, 30100-Murcia, Spain.
Phytomelatonin acts as a plant biostimulator, enhancing stress tolerance and improving photosynthesis and metabolism. This review explores its role as a master regulator in plant hormone networks and its potential for crop improvement.
Area of Science:
- Plant Science
- Biochemistry
- Molecular Biology
Background:
- Phytomelatonin is a ubiquitous plant molecule with significant biostimulatory functions.
- It plays a crucial role in enhancing plant tolerance to biotic and abiotic stresses.
Purpose of the Study:
- To review the multifaceted roles of phytomelatonin in plant metabolism.
- To elucidate its interactions with the plant hormone network and redox homeostasis.
Main Methods:
- Literature review of studies on phytomelatonin's effects on plant physiology and metabolism.
- Analysis of gene and enzyme transcript regulation by melatonin.
Main Results:
- Melatonin enhances primary metabolism, including photosynthesis, stomatal conductance, and nutrient uptake (N, P, S).
- It up-regulates secondary metabolism, increasing polyphenols, glucosinolates, terpenoids, and alkaloids.
- Melatonin modulates plant hormone levels and signaling, acting as a master regulator.
Conclusions:
- Phytomelatonin is a key regulator of plant metabolism and stress response.
- Its ability to control hormone and redox networks offers potential for crop improvement and post-harvest preservation.
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