Functions of melatonin in plants: a review

Journal of Pineal Research, Journal Year: 2015, Volume and Issue: 59(2), P. 133 - 150

Published: June 19, 2015

The number of studies on melatonin in plants has increased significantly recent years. This molecule, with a large set functions animals, also shown great potential plant physiology. review outlines the main physiology higher plants. Its role as antistress agent against abiotic stressors, such drought, salinity, low and high ambient temperatures, UV radiation toxic chemicals, is analyzed. latest data their plant-pathogen interactions are discussed. Both biotic stresses produce significant increase endogenous levels, indicating its possible effector these situations. existence circadian rhythms levels been demonstrated some species, data, although limited, suggest central this molecule day/night cycles Finally, another aspect that led to volume research involvement aspects development regulation. Although hormone still far from being fully established, processes growth, rhizogenesis, photosynthesis seems evident. multiple changes gene expression caused by point multiregulatory capable coordinating many development. last aspect, together an alleviating-stressor agent, suggests excellent prospect for crop improvement.

Language: Английский

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Melatonin: A New Plant Hormone and/or a Plant Master Regulator?

Trends in Plant Science, Journal Year: 2018, Volume and Issue: 24(1), P. 38 - 48

Published: Nov. 13, 2018

Language: Английский

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Roles of melatonin in abiotic stress resistance in plants

Journal of Experimental Botany, Journal Year: 2014, Volume and Issue: 66(3), P. 647 - 656

Published: Aug. 14, 2014

In recent years melatonin has emerged as a research highlight in plant studies. Melatonin different functions many aspects of growth and development. The most frequently mentioned are related to abiotic stresses such drought, radiation, extreme temperature, chemical stresses. This review mainly focuses on the regulatory effects when plants face harsh environmental conditions. Evidence indicates that stress can increase level endogenous plants. Overexpression biosynthetic genes elevates levels transgenic show enhanced tolerance Exogenously applied also improve ability tolerate mechanisms by which alleviates discussed.

Language: Английский

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Melatonin enhances plant growth and abiotic stress tolerance in soybean plants

Journal of Experimental Botany, Journal Year: 2014, Volume and Issue: 66(3), P. 695 - 707

Published: Oct. 6, 2014

Melatonin is a well-known agent that plays multiple roles in animals. Its possible function plants less clear. In the present study, we tested effect of melatonin (N-acetyl-5-methoxytryptamine) on soybean growth and development. Coating seeds with significantly promoted as judged from leaf size plant height. This enhancement was also observed production their fatty acid content. increased pod number seed number, but not 100-seed weight. improved tolerance to salt drought stresses. Transcriptome analysis revealed stress inhibited expressions genes related binding, oxidoreductase activity/process, secondary metabolic processes. up-regulated by stress, hence alleviated inhibitory effects gene expressions. Further detailed affected pathways documents probably achieved its promotional through involved cell division, photosynthesis, carbohydrate metabolism, biosynthesis, ascorbate metabolism. Our results demonstrate has significant potential for improvement production. study should uncover more about molecular mechanisms melatonin's soybeans other crops.

Language: Английский

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Melatonin: plant growth regulator and/or biostimulator during stress?

Trends in Plant Science, Journal Year: 2014, Volume and Issue: 19(12), P. 789 - 797

Published: Aug. 22, 2014

Language: Английский

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Melatonin promotes seed germination under high salinity by regulating antioxidant systems, ABA and GA₄ interaction in cucumber (Cucumis sativus L.)

Journal of Pineal Research, Journal Year: 2014, Volume and Issue: 57(3), P. 269 - 279

Published: Aug. 12, 2014

Although previous studies have found that melatonin can promote seed germination, the mechanisms involved in perceiving and signaling remain poorly understood. In this study, it was synthesized during cucumber germination with a peak levels occurring 14 hr into germination. This is indicative of correlation between synthesis Meanwhile, seeds pretreated exogenous (1 μM) showed enhanced rates under 150 mM NaCl stress compared to water-pretreated salinity stress. There are two apparent by which alleviated salinity-induced inhibition Exogenous decreased oxidative damage induced enhancing gene expression antioxidants. Under stress, untreated control, activities antioxidant enzymes including superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) were significantly increased approximately 1.3-5.0-fold, concomitant 1.4-2.0-fold increase CsCu-ZnSOD, CsFe-ZnSOD, CsCAT, CsPOD melatonin-pretreated seeds. Melatonin also affecting abscisic acid (ABA) gibberellin (GA) biosynthesis catabolism Compared treatment, up-regulated ABA genes (e.g., CsCYP707A1 CsCYP707A2, 3.5 105-fold higher than treatment at 16 hr, respectively) down-regulated CsNECD2, 0.29-fold CK2 hr), resulting rapid decrease content early stage At same time, positively GA GA20ox GA3ox, 2.3 3.9-fold 0 12 respectively), contributing significant (especially GA4) content. we provide new evidence suggesting alleviates inhibitory effects on mainly regulating GA4.

Language: Английский

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Melatonin and its relationship to plant hormones

Annals of Botany, Journal Year: 2017, Volume and Issue: 121(2), P. 195 - 207

Published: Aug. 17, 2017

Plant melatonin appears to be a multi-regulatory molecule, similar those observed in animals, with many specific functions plant physiology. In recent years, the number of studies on plants has increased significantly. One most studied actions is its effect biotic and abiotic stress, such as that produced by drought, extreme temperatures, salinity, chemical pollution UV radiation, among others.

Language: Английский

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Comparative physiological, metabolomic, and transcriptomic analyses reveal mechanisms of improved abiotic stress resistance in bermudagrass [Cynodon dactylon (L). Pers.] by exogenous melatonin

Journal of Experimental Botany, Journal Year: 2014, Volume and Issue: 66(3), P. 681 - 694

Published: Sept. 15, 2014

Melatonin (N-acetyl-5-methoxytryptamine), a well-known animal hormone, is also involved in plant development and abiotic stress responses. In this study, it shown that exogenous application of melatonin conferred improved salt, drought, cold resistances bermudagrass. Moreover, treatment alleviated reactive oxygen species (ROS) burst cell damage induced by stress; activation several antioxidants. Additionally, melatonin-pre-treated plants exhibited higher concentrations 54 metabolites, including amino acids, organic sugars, sugar alcohols, than non-treated under conditions. Genome-wide transcriptomic profiling identified 3933 transcripts (2361 up-regulated 1572 down-regulated) were differentially expressed melatonin-treated versus controls. Pathway gene ontology (GO) term enrichment analyses revealed genes nitrogen metabolism, major carbohydrate tricarboxylic acid (TCA)/org transformation, transport, hormone metal handling, redox, secondary metabolism over-represented after pre-treatment. Taken together, study provides the first evidence protective roles bermudagrass response to stresses, partially via antioxidants modulation metabolic homeostasis. Notably, showed underlying mechanisms could involve reorientation photorespiratory metabolism.

Language: Английский

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Melatonin: A master regulator of plant development and stress responses

Journal of Integrative Plant Biology, Journal Year: 2020, Volume and Issue: 63(1), P. 126 - 145

Published: July 17, 2020

Melatonin is a pleiotropic molecule with multiple functions in plants. Since the discovery of melatonin plants, numerous studies have provided insight into biosynthesis, catabolism, and physiological biochemical this important molecule. Here, we describe biosynthesis from tryptophan, as well its various degradation pathways The identification putative receptor plants has led to hypothesis that hormone involved regulating plant growth, aerial organ development, root morphology, floral transition. universal antioxidant activity role preserving chlorophyll might explain anti-senescence capacity aging leaves. An impressive amount research focused on modulating postharvest fruit ripening by expression ethylene-related genes. Recent evidence also indicated plant's response biotic stress, cooperating other phytohormones well-known molecules such reactive oxygen species nitric oxide. Finally, great progress been made towards understanding how alleviates effects abiotic stresses, including salt, drought, extreme temperature, heavy metal stress. Given diverse roles, propose master regulator

Language: Английский

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Tolerance to Stress Combination in Tomato Plants: New Insights in the Protective Role of Melatonin

Molecules, Journal Year: 2018, Volume and Issue: 23(3), P. 535 - 535

Published: Feb. 28, 2018

Abiotic stresses such as drought, heat or salinity are major causes of yield loss worldwide. Recent studies have revealed that the acclimation plants to a combination different environmental is unique and therefore cannot be directly deduced from studying response each applied individually. The efficient detoxification reactive oxygen species (ROS) thought play key role in enhancing tolerance abiotic stresses. Here, we report on melatonin protection photosynthetic apparatus through increase ROS tomato grown under heat, two most common known act jointly. Plants treated with exogenous showed modulation expression some antioxidant-related genes their related enzymes. More specifically, ascorbate peroxidase, glutathione reductase, peroxidase phospholipid hydroperoxide (APX, GR, GPX Ph-GPX, resepctively) an antagonistic regulation compared did not receive melatonin. This translated into better antioxidant capacity lesser accumulation stress combination. performance photosynthesis parameters photosystems was also increased heat. In accordance these findings, were found grow non-treated ones. Our study highlights important plays stresses, how this compound can specifically regulate oxidative stress-related enzymes plant tolerance.

Language: Английский

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