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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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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Melatonin biosynthesis in plants: multiple pathways catalyze tryptophan to melatonin in the cytoplasm or chloroplasts

Journal of Pineal Research, Journal Year: 2016, Volume and Issue: 61(4), P. 426 - 437

Published: Sept. 7, 2016

Melatonin is an animal hormone as well a signaling molecule in plants. It was first identified plants 1995, and almost all enzymes responsible for melatonin biosynthesis had already been characterized these species. from tryptophan requires four-step reactions. However, six genes, that is, TDC, TPH, T5H, SNAT, ASMT, COMT, have implicated the synthesis of plants, suggesting presence multiple pathways. Two major pathways proposed based on enzyme kinetics: One tryptophan/tryptamine/serotonin/N-acetylserotonin/melatonin pathway, which may occur under normal growth conditions; other tryptophan/tryptamine/serotonin/5-methoxytryptamine/melatonin when produce large amounts serotonin, example, upon senescence. The biosynthetic capacity associated with conversion to serotonin much higher than melatonin, yields low level Many intermediates are produced various subcellular compartments, such cytoplasm, endoplasmic reticulum, chloroplasts, either facilitates or impedes subsequent enzymatic steps. Depending pathways, final sites vary at cytoplasm differentially affect mode action

Language: Английский

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Melatonin treatment delays postharvest senescence and regulates reactive oxygen species metabolism in peach fruit

Postharvest Biology and Technology, Journal Year: 2016, Volume and Issue: 118, P. 103 - 110

Published: April 14, 2016

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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Effects of melatonin treatment on the postharvest quality of strawberry fruit

Postharvest Biology and Technology, Journal Year: 2018, Volume and Issue: 139, P. 47 - 55

Published: Feb. 3, 2018

Language: Английский

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Melatonin regulates the functional components of photosynthesis, antioxidant system, gene expression, and metabolic pathways to induce drought resistance in grafted Carya cathayensis plants

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 713, P. 136675 - 136675

Published: Jan. 13, 2020

Language: Английский

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Phytomelatonin: Assisting Plants to Survive and Thrive

Molecules, Journal Year: 2015, Volume and Issue: 20(4), P. 7396 - 7437

Published: April 22, 2015

This review summarizes the advances that have been made in terms of identified functions melatonin plants. Melatonin is an endogenously-produced molecule all plant species investigated. Its concentration organs varies different tissues, e.g., roots versus leaves, and with their developmental stage. As animals, pathway synthesis plants utilizes tryptophan as essential precursor molecule. inducible when they are exposed to abiotic stresses (extremes temperature, toxins, increased soil salinity, drought, etc.) well biotic (fungal infection). aids root growth, leaf morphology, chlorophyll preservation fruit development. There also evidence exogenously-applied improves seed germination, growth crop yield its application products post-harvest shows ripening may improve food quality. Since was only discovered two decades ago, there still a great deal learn about functional significance It hope authors current will serve stimulus for scientists join endeavor clarifying function this phylogenetically-ancient particularly reference mechanisms by which mediates multiple actions.

Language: Английский

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Phytomelatonin: a universal abiotic stress regulator

Journal of Experimental Botany, Journal Year: 2017, Volume and Issue: 69(5), P. 963 - 974

Published: Dec. 19, 2017

Melatonin, a derivative of tryptophan, was first detected in plant species 1995 and it has been shown to be diverse regulator during growth development, stress responses. Recently, great progress made towards determining the detailed functions melatonin responses abiotic stress. Melatonin priming improves tolerance cold, heat, salt, drought stresses through regulation genes involved DREB/CBF, HSF, SOS, ABA pathways, respectively. As scavenger free radicals, also directly detoxifies reactive oxygen species, thus alleviating membrane oxidation. Abiotic stress-inhibited photosynthesis is partially recovered metabolites accumulate presence melatonin, leading improved growth, delayed leaf senescence, increased tolerance. In this review, we summarize interactions with phytohormones regulate downstream gene expression, protein stabilization, epigenetic modification plants. Finally, consider need for, approaches to, identification receptors components signaling transduction pathways.

Language: Английский

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