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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Delay of ripening and softening in ‘Guifei’ mango fruit by postharvest application of melatonin

Postharvest Biology and Technology, Journal Year: 2020, Volume and Issue: 163, P. 111136 - 111136

Published: Jan. 29, 2020

Language: Английский

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Melatonin alleviates pericarp browning in litchi fruit by regulating membrane lipid and energy metabolisms

Postharvest Biology and Technology, Journal Year: 2019, Volume and Issue: 160, P. 111066 - 111066

Published: Nov. 15, 2019

Language: Английский

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Melatonin as a regulatory hub of plant hormone levels and action in stress situations

Plant Biology, Journal Year: 2020, Volume and Issue: 23(S1), P. 7 - 19

Published: Oct. 24, 2020

Melatonin, a molecule first discovered in animal tissues, plays an important role multiple physiological responses as possible plant master regulator. It mediates to different types of stress, both biotic and abiotic. Melatonin reduces the negative effects associated with stressors, improving response by increasing stress tolerance. When plants respond situations, they use up large amount resources through set perfectly synchronized actions. Responses mediated melatonin plant's hormones to, after adequate modulation, counteract overcome action stressor. In this paper, we review melatonin-plant hormone relationships. Factors that trigger central are analysed. An extensive analysis current studies shows modulates metabolism (biosynthesis catabolism), rise or fall their endogenous levels, regulation signalling elements how affects final auxin, gibberellins, cytokinins, abscisic acid, ethylene, salicylic jasmonates, brassinosteroids, polyamines strigolactones. Lastly, general overview melatonin's actions its regulatory at global level is provided proposals for future research made.

Language: Английский

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Melatonin improves rice salinity stress tolerance by NADPH oxidase‐dependent control of the plasma membrane K⁺ transporters and K⁺ homeostasis

Plant Cell & Environment, Journal Year: 2020, Volume and Issue: 43(11), P. 2591 - 2605

Published: March 20, 2020

Abstract This study aimed to reveal the mechanistic basis of melatonin‐mediated amelioration salinity stress in plants. Electrophysiological experiments revealed that melatonin decreased salt‐induced K + efflux (a critical determinant plant salt tolerance) a dose‐ and time‐dependent manner reduced sensitivity plasma membrane ‐permeable channels hydroxyl radicals. These beneficial effects were abolished by NADPH oxidase blocker DPI. Transcriptome analyses induced 585 (448 up‐ 137 down‐regulated) 59 (54 5 differentially expressed genes (DEGs) root tip mature zone, respectively. The most noticeable changes melatonin‐induced increase expression several DEGs encoding respiratory burst oxidases ( OsRBOHA OsRBOHF ), calcineurin B‐like/calcineurin B‐like‐interacting protein kinase OsCBL / OsCIPK calcium‐dependent OsCDPK ) under stress. Melatonin also enhanced potassium transporter OsAKT1 , OsHAK1 OsHAK5 ). Taken together, these results indicate improves tolerance rice enabling retention roots, latter process is conferred scavenging radicals concurrent ‐dependent ROS signalling required activate stress‐responsive uptake transporters tip.

Language: Английский

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Melatonin Pretreatment Confers Heat Tolerance and Repression of Heat-Induced Senescence in Tomato Through the Modulation of ABA- and GA-Mediated Pathways

Frontiers in Plant Science, Journal Year: 2021, Volume and Issue: 12

Published: March 25, 2021

Heat stress and abscisic acid (ABA) induce leaf senescence, whereas melatonin (MT) gibberellins (GA) play critical roles in inhibiting senescence. Recent research findings confirm that plant tolerance to diverse stresses is closely associated with foliage lifespan. However, the molecular mechanism underlying signaling interaction of MT GA ABA regarding heat-induced senescence largely remains undetermined. Herein, we investigated putative functions suppressing tomato how coordinate each other presence MT. Tomato seedlings were pretreated 100 μM or water exposed high temperature (38/28°C) for 5 days (d). significantly accelerated damage photosystem upregulation reactive oxygen species (ROS), generating RBOH gene expression. Melatonin treatment markedly attenuated as reflected by reduced yellowing, an increased Fv/Fm ratio, ROS production. The Rbohs gene, chlorophyll catabolic genes, senescence-associated expression levels suppressed addition. Exogenous application elevated endogenous contents but content high-temperature-exposed plants. inhibited paclobutrazol (PCB, a biosynthesis inhibitor) sodium tungstate (ST, treatment. MT-induced heat was compromised both inhibitor-treated transcript abundance genes repressed; however, upregulated MT-treated Moreover, suppressor inhibited, while application. Taken together, MT-mediated suppression has collaborated activation inhibition pathways tomato.

Language: Английский

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Fruit ripening: dynamics and integrated analysis of carotenoids and anthocyanins

BMC Plant Biology, Journal Year: 2022, Volume and Issue: 22(1)

Published: Jan. 11, 2022

Fruits are vital food resources as they loaded with bioactive compounds varying different stages of ripening. As the fruit ripens, a dynamic color change is observed from green to yellow red due biosynthesis pigments like chlorophyll, carotenoids, and anthocyanins. Apart making attractive being visual indicator ripening status, add value ripened by them source nutraceuticals industrial products. matures, it undergoes biochemical changes which alter pigment composition fruits.The synthesis, degradation retention pathways mediated hormonal, genetic, environmental factors. Manipulation underlying regulatory mechanisms during suggests ways enhance desired in fruits biotechnological interventions. Here we report, in-depth insight into dynamics action.This review emphasizes role an asset augment nutritive value, antioxidant levels net carbon gain fruits; for biofortification have tremendous along tool predict harvest. This report will be great utility harvesters, traders, consumers, natural product divisions extract leading nutraceutical potential preferred biosynthesized at stages.

Language: Английский

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Abscisic acid signaling and crosstalk with phytohormones in regulation of environmental stress responses

Environmental and Experimental Botany, Journal Year: 2022, Volume and Issue: 199, P. 104885 - 104885

Published: April 22, 2022

Language: Английский

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Abscisic acid in plants under abiotic stress: crosstalk with major phytohormones

Plant Cell Reports, Journal Year: 2023, Volume and Issue: 42(6), P. 961 - 974

Published: April 20, 2023

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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