Plant hormones and neurotransmitter interactions mediate antioxidant defenses under induced oxidative stress in plants

Frontiers in Plant Science, Journal Year: 2022, Volume and Issue: 13

Published: Sept. 9, 2022

Due to global climate change, abiotic stresses are affecting plant growth, productivity, and the quality of cultivated crops. Stressful conditions disrupt physiological activities suppress defensive mechanisms, resulting in stress-sensitive plants. Consequently, plants implement various endogenous strategies, including hormone biosynthesis (e.g., abscisic acid, jasmonic salicylic brassinosteroids, indole-3-acetic cytokinins, ethylene, gibberellic strigolactones) withstand stress conditions. Combined or single disrupts normal transportation solutes, causes electron leakage, triggers reactive oxygen species (ROS) production, creating oxidative Several enzymatic non-enzymatic defense systems marshal a plant’s antioxidant defenses. While responses protective role system have been well-documented recent investigations, interrelationships among hormones, neurotransmitters (NTs, such as serotonin, melatonin, dopamine, acetylcholine, γ-aminobutyric acid), defenses not well explained. Thus, this review discusses advances transgenic metabolic developments, potential interaction hormones with NTs response tolerance mechanisms. Furthermore, we discuss current challenges future directions (transgenic breeding genome editing) for improvement using modern molecular tools. The involved regulating systems, networks, abiotic-induced also discussed.

Language: Английский

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Melatonin-mediated temperature stress tolerance in plants

GM crops & food, Journal Year: 2022, Volume and Issue: 13(1), P. 196 - 217

Published: Aug. 19, 2022

Global climate changes cause extreme temperatures and a significant reduction in crop production, leading to food insecurity worldwide. Temperature extremes (including both heat cold stresses) is one of the most limiting factors plant growth development severely affect physiology, biochemical, molecular processes. Biostimulants like melatonin (MET) have multifunctional role that acts as “defense molecule” safeguard plants against noxious effects temperature stress. MET treatment improves tolerance by improving several defense mechanisms. Current research also suggests interacts with other molecules, phytohormones gaseous which greatly supports adaptation Genetic engineering via overexpression or CRISPR/Cas system biosynthetic genes uplifts levels transgenic enhances stress tolerance. This review highlights critical production We documented how molecules alleviate MET-mediated breeding would be great potential helping adverse creating plants.

Language: Английский

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Phytomelatonin: an unexpected molecule with amazing performances in plants

Journal of Experimental Botany, Journal Year: 2022, Volume and Issue: 73(17), P. 5779 - 5800

Published: Jan. 12, 2022

Phytomelatonin, a multifunctional molecule that has been found to be present in all plants examined date, an important role as modulatory agent (a biostimulator) improves plant tolerance both biotic and abiotic stress. We review of phytomelatonin considers its roles metabolism particular interactions with hormone network. In the primary plants, melatonin rate efficiency photosynthesis, well related factors such stomatal conductance, intercellular CO2, Rubisco activity. It also shown down-regulate some senescence transcription factors. Melatonin up-regulates many enzyme transcripts carbohydrates (including sucrose starch), amino acids, lipid metabolism, optimizing N, P, S uptake. With respect secondary clear increases polyphenol, glucosinolate, terpenoid, alkaloid contents have described numerous melatonin-treated plants. Generally, most genes these biosynthesis pathways up-regulated by melatonin. The great regulatory capacity is result control redox networks. acts master regulator, up-/down-regulating different levels signalling, key player homeostasis. counteract diverse critical situations pathogen infections stresses, provide varying degrees tolerance. propose possible future applications for crop improvement post-harvest product preservation.

Language: Английский

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Functions and prospects of melatonin in plant growth, yield, and quality

Journal of Experimental Botany, Journal Year: 2022, Volume and Issue: 73(17), P. 5928 - 5946

Published: May 30, 2022

Abstract Melatonin (N-acetyl-5-methoxytryptamine) is an indole molecule widely found in animals and plants. It well known that melatonin improves plant resistance to various biotic abiotic stresses due its potent free radical scavenging ability while being able modulate signaling response pathways through mostly unknown mechanisms. In recent years, increasing number of studies have shown plays a crucial role improving crop quality yield by participating the regulation aspects growth development. Here, we review effects on vegetative reproductive development, systematically summarize molecular regulatory network. Moreover, effective concentrations exogenously applied different crops or at stages same are analysed. addition, compare endogenous phytomelatonin organs, evaluate potential function circadian rhythms. The prospects approaches regulating exogenous application appropriate melatonin, modification metabolism-related genes, use nanomaterials other technologies improve utilization efficiency also discussed.

Language: Английский

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Melatonin Function and Crosstalk with Other Phytohormones under Normal and Stressful Conditions

Genes, Journal Year: 2022, Volume and Issue: 13(10), P. 1699 - 1699

Published: Sept. 22, 2022

Melatonin was discovered in plants the late nineties, but its role, signaling, and crosstalk with other phytohormones remain unknown. Research on melatonin has risen dramatically recent years role of this putative plant hormone under biotic abiotic stress conditions been reported. In present review, we discuss main functions growth development plants, stresses, such as water (waterlogging drought), extreme temperature (low high), salinity, heavy metal, light-induced stress. Similarly, also stresses (antiviral, antibacterial, antifungal effects). Moreover, review meticulously discusses auxins, gibberellic acids, cytokinins, ethylene, salicylic acid normal stressful reports receptors signaling plants. All these aspects suggest that phytomelatonin is a key player crop improvement regulation.

Language: Английский

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Mechanistic insights on melatonin-mediated plant growth regulation and hormonal cross-talk process in solanaceous vegetables

Scientia Horticulturae, Journal Year: 2022, Volume and Issue: 308, P. 111570 - 111570

Published: Oct. 14, 2022

Language: Английский

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Melatonin and Abiotic Stress Tolerance in Crop Plants

International Journal of Molecular Sciences, Journal Year: 2023, Volume and Issue: 24(8), P. 7447 - 7447

Published: April 18, 2023

Increasing food demand by the growing human population and declining crop productivity due to climate change affect global security. To meet challenges, developing improved crops that can tolerate abiotic stresses is a priority. Melatonin in plants, also known as phytomelatonin, an active component of various cellular mechanisms alleviates oxidative damage hence supporting plant survive stress conditions. Exogenous melatonin strengthens this defence mechanism enhancing detoxification reactive by-products, promoting physiological activities, upregulating stress-responsive genes alleviate during stress. In addition its well-known antioxidant activity, protects against regulating hormones, activating ER genes, increasing protein homoeostasis, heat shock transcription factors proteins. Under stress, enhances unfolded response, endoplasmic reticulum-associated degradation, autophagy, which ultimately protect cells from programmed cell death promotes repair resulting increased survival.

Language: Английский

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From challenges to solutions: The impact of melatonin on abiotic stress synergies in horticultural plants via redox regulation and epigenetic signaling

Scientia Horticulturae, Journal Year: 2023, Volume and Issue: 321, P. 112369 - 112369

Published: July 31, 2023

Language: Английский

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The role of melatonin in plant growth and metabolism, and its interplay with nitric oxide and auxin in plants under different types of abiotic stress

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Feb. 14, 2023

Melatonin is a pleiotropic signaling molecule that reduces the adverse effects of abiotic stresses, and enhances growth physiological function many plant species. Several recent studies have demonstrated pivotal role melatonin in functions, specifically its regulation crop yield. However, comprehensive understanding melatonin, which regulates yield under stress conditions, not yet available. This review focuses on progress research biosynthesis, distribution, metabolism multiple complex functions plants mechanisms grown stresses. In this review, we focused enhancement yield, elucidated interactions with nitric oxide (NO) auxin (IAA, indole-3-acetic acid) when are various The present revealed endogenousapplication to plants, NO IAA, enhanced interaction regulated morphophysiological biochemical activities, mediated by G protein-coupled receptor synthesis genes. IAA increasing levels synthesis, polar transport. Our aim was provide performance and, therefore, further explicate hormones use regulate

Language: Английский

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Melatonin as a key regulator in seed germination under abiotic stress

Journal of Pineal Research, Journal Year: 2024, Volume and Issue: 76(1)

Published: Jan. 1, 2024

Abstract Seed germination (SG) is the first stage in a plant's life and has an immense importance sustaining crop production. Abiotic stresses reduce SG by increasing deterioration of seed quality, reducing potential, vigor. Thus, to achieve sustainable level yield, it important improve under abiotic stress conditions. Melatonin (MEL) biomolecule that interplays developmental processes regulates many adaptive responses plants, especially stresses. this review specifically summarizes discusses mechanistic basis MEL‐mediated MEL regulating some stress‐specific common responses. For instance, induced specific include regulation ionic homeostasis, hydrolysis storage proteins salinity stress, C‐repeat binding factors signaling cold starch metabolism high temperature heavy metal activation aquaporins accumulation osmolytes drought stress. On other hand, mediated gibberellins biosynthesis abscisic acid catabolism, redox Ca 2+ are amongst Nonetheless such as endogenous contents, plant species, growth conditions also influence above‐mentioned In conclusion, interacting with different physiological mechanisms.

Language: Английский

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