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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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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Melatonin as a Foliar Application and Adaptation in Lentil (Lens culinaris Medik.) Crops under Drought Stress

Sustainability, Journal Year: 2022, Volume and Issue: 14(24), P. 16345 - 16345

Published: Dec. 7, 2022

Here, we grow two different varieties of lentil (lentil-2009 and lentil-93) under drought levels with applications melatonin. Increasing the soil water deficit significantly decreased numerous morphological biochemical characteristics, including shoot length, total chlorophyll content, transpiration rate, in both lentil. Contrastingly, stress increased concentrations malondialdehyde (MDA) hydrogen peroxide (H2O2), electrolyte leakage, an indicator oxidative damage to membrane-bound organelles. The activities enzymatic antioxidants osmolytes were initially up a level 80% field capacity (WFC) but gradually higher (60% WFC) soil. At same time, results also showed that lentil-2009 is more tolerant than lentil-93. negative impact can be overcome by application Melatonin plant growth biomass, photosynthetic pigments, gas exchange enhanced various non-enzymatic proline content decreasing stress. We conclude foliar melatonin offers new possibilities for promoting tolerance.

Language: Английский

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Antioxidant Machinery and Glyoxalase System Regulation Confers Salt Stress Tolerance to Wheat (Triticum aestivum L.) Plants Treated with Melatonin and Salicylic Acid

Journal of soil science and plant nutrition, Journal Year: 2022, Volume and Issue: 22(3), P. 3527 - 3540

Published: July 19, 2022

Abstract Plant growth regulators melatonin (MT) and salicylic acid (SA) have potent roles in plant salt tolerance. However, only a few reports studied the influence of their combined treatment on The current study, as first investigation, was aimed to evaluate effect MT SA antioxidant glyoxalase defense machineries salt-stressed wheat plants. In present potential role 70 μM and/or 75 mg l −1 mitigating injury (6.0 12.0 dS m salinity levels) investigated ( Triticum aestivum L. cv. Sids 14). Exogenously applied improved activity ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate glutathione S-transferase, which effectively scavenged reactive oxygen species (ROS) stressed Excessive accumulation toxic methylglyoxal reversed via up-regulation system (glyoxalase I II) ascorbate–glutathione cycle. Foliar applications also reduced membrane damage by lowering lipid peroxidation protein oxidation due effective ROS detoxification antioxidants such ascorbate, glutathione, phenols, flavonoids. Moreover, exogenous increased endogenous levels under both non-saline saline conditions. yielded best results. Overall, this regulated machinery system, suggesting for it stress mitigation. Therefore, can be considered an method reducing toxicity sustainable agricultural systems.

Language: Английский

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Impact of Exogenous Melatonin Application on Photosynthetic Machinery under Abiotic Stress Conditions

Plants, Journal Year: 2023, Volume and Issue: 12(16), P. 2948 - 2948

Published: Aug. 15, 2023

Inhospitable conditions that hinder plant growth and development encompass a range of abiotic stresses, such as drought, extreme temperatures (both low high), salinity, exposure to heavy metals, irradiation. The cumulative impact these stresses leads considerable reduction in agricultural productivity worldwide. generation reactive oxygen species (ROS) is shared mechanism toxicity induced by all stimuli plants, resulting oxidative damage membrane instability. Extensive research has shed light on the dual role melatonin where it serves both regulator, fostering development, potent protector against stresses. inherent potential function natural antioxidant positions promising biostimulant for use, bolstering plants' abilities withstand wide array environmental challenges. Beyond its properties, demonstrated capacity regulate expression genes associated with photosynthetic process. This additional characteristic enhances appeal versatile chemical agent can be exogenously applied particularly adverse conditions, improve their resilience optimize efficiency every phase life cycle. An examination molecular mechanisms underlying stress-protective effects exogenous machinery plants under various presented this paper. In addition, future prospects are discussed developing stress-tolerant crops sustainable agriculture challenging environments.

Language: Английский

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Melatonin enhances drought tolerance by affecting jasmonic acid and lignin biosynthesis in wheat (Triticum aestivum L.)

Plant Physiology and Biochemistry, Journal Year: 2023, Volume and Issue: 202, P. 107974 - 107974

Published: Aug. 16, 2023

Language: Английский

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The role of phytomelatonin receptor 1-mediated signaling in plant growth and stress response

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

Published: March 10, 2023

Phytomelatonin is a pleiotropic signaling molecule that regulates plant growth, development, and stress response. In cells, phytomelatonin synthesized from tryptophan via several consecutive steps are catalyzed by decarboxylase (TDC), tryptamine 5-hydroxylase (T5H), serotonin N -acyltransferase (SNAT), -acetylserotonin methyltransferase (ASMT) and/or caffeic acid-3- O -methyltransferase (COMT). Recently, the identification of receptor PMTR1 in Arabidopsis has been considered turning point research, with function signal emerging as receptor-based regulatory strategy. addition, homologs have identified species found to regulate seed germination seedling stomatal closure, leaf senescence, responses. this article, we review recent evidence our understanding PMTR1-mediated pathways under environmental stimuli. Based on structural comparison melatonin 1 (MT1) human homologs, propose similarity three-dimensional structure receptors probably represents convergent evolution recognition different species.

Language: Английский

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Have All of the Phytohormonal Properties of Melatonin Been Verified?

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(6), P. 3550 - 3550

Published: March 21, 2024

Melatonin is a ubiquitous regulator in plants and performs variety of physiological roles, including resistance to abiotic stress, regulation growth development, enhancement plant immunity. exhibits the characteristics phytohormone with its pleiotropic effects, biosynthesis, conjugation, catabolism, effective concentration, shape location dose-response curves. In addition, CAND2/PMTR1, phytomelatonin receptor candidate belonging G protein-coupled receptors (GPCRs), supports concept melatonin as phytohormone. However, biochemistry needs be further characterized. particular, some experimental findings date cannot explained by known GPCR signaling mechanisms, so studies are needed explore possibility novel mechanisms.

Language: Английский

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Melatonin Enhances Maize Germination, Growth, and Salt Tolerance by Regulating Reactive Oxygen Species Accumulation and Antioxidant Systems

Plants, Journal Year: 2025, Volume and Issue: 14(2), P. 296 - 296

Published: Jan. 20, 2025

Melatonin (MT) is a crucial hormone that controls and positively regulates plant growth under abiotic stress, but the biochemical physiological processes of combination melatonin seed initiation exogenous spray treatments their effects on maize germination seedling salt tolerance are not well understood. Consequently, in this research, we utilized cultivars Zhengdan 958 (ZD958) Demeiya 1 (DMY1), which extensively marketed northeastern China’s high-latitude cold regions, to reveal modulating salinity by determining impacts varying concentrations characteristics, osmoregulation, antioxidant systems, gene expression. The findings revealed stress (100 mM NaCl) significantly inhibited development, resulted significant increases H2O2 O2− content decreases enzyme activity photosynthetic pigment seedlings. However, considerably reduced development inhibition caused Moreover, alleviated NaCl-induced membrane damage oxidative Na+ excessively large quantities reactive oxygen species (ROS). In addition, increased expression genes ZmSOD4, ZmCAT2, ZmAPX2. This study demonstrates potential role combined foliar mitigating detrimental growth, giving theoretical foundation future research possible advantages regulating chemicals attaining sustainable production salt-alkaline soils.

Language: Английский

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Maize PHYTOMELATONIN RECEPTOR1 functions in plant tolerance to osmotic and drought stress

Journal of Experimental Botany, Journal Year: 2021, Volume and Issue: 73(17), P. 5961 - 5973

Published: Dec. 17, 2021

Phytomelatonin is a universal signal molecule that regulates plant growth and stress responses; however, only one receptor can directly bind with perceive melatonin signaling has been identified so far, namely AtPMTR1/CAND2 in Arabidopsis. Whether other plants contain similar and, if so, how it functions still unknown. In this study, we new phytomelatonin the monocot maize (Zea mays), investigated its role responses to osmotic drought stress. Using homology searching, plasma membrane-localized protein, Zm00001eb214610/ZmPMTR1, strong binding activity as potential maize. Overexpressing ZmPMTR1 Arabidopsis Col-0 promoted tolerance, rescued sensitivity of cand2-1 mutant. Furthermore, also largely defects melatonin-induced stomatal closure mutant, thereby reducing water loss rate increasing tolerance addition, mutant ZmPMTR1, EMS4-06e2fl, point-mutation causing premature termination protein translation, found had lower leaf temperatures, increased loss, enhanced sensitivity. Thus, present first be examined plant, our results indicate plays an important function response

Language: Английский

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