Melatonin: Discovery, Biosynthesis, Phytohormones Crosstalk, and Roles in Agricultural Crops under Abiotic Stress Conditions

Environmental and Experimental Botany, Journal Year: 2024, Volume and Issue: 226, P. 105942 - 105942

Published: Aug. 13, 2024

Language: Английский

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Integrated Analysis of the Transcriptome and Metabolome Revealed the Molecular Mechanisms Underlying the Enhanced Salt Tolerance of Rice Due to the Application of Exogenous Melatonin

Frontiers in Plant Science, Journal Year: 2021, Volume and Issue: 11

Published: Jan. 14, 2021

High salinity is one of the major abiotic stresses limiting rice production. Melatonin has been implicated in salt tolerance rice. However, molecular basis melatonin-mediated remains unclear. In present study, we performed an integrated transcriptome and metabolome profiling seedlings treated with salt, melatonin, or + melatonin. The application exogenous melatonin increased plants by decreasing sodium content to maintain Na /K homeostasis, alleviating membrane lipid oxidation, enhancing chlorophyll contention. A comparative analysis revealed that complex pathways contribute tolerance. More specifically, AP2/EREBP–HB–WRKY transcriptional cascade phytohormone (e.g., auxin abscisic acid) signaling were activated treatment. On profiles, 64 metabolites, such as amino acids, organic nucleotides, secondary identified abundances only Several these metabolites including endogenous its intermediates (5-hydroxy- L -tryptophan, N 1 -acetyl- 2 -formyl-5-methoxykynuramine), gallic acid, diosmetin, cyanidin 3- O -galactoside had antioxidant functions, suggesting activates multiple alleviate detrimental effects stress. Combined analyses a few gene–metabolite networks related various pathways, linoleic acid metabolism are important for data presented herein may be useful further elucidating regulatory roles plant responses stresses.

Language: Английский

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The Role of Membrane Transporters in Plant Growth and Development, and Abiotic Stress Tolerance

International Journal of Molecular Sciences, Journal Year: 2021, Volume and Issue: 22(23), P. 12792 - 12792

Published: Nov. 26, 2021

The proteins of membrane transporters (MTs) are embedded within membrane-bounded organelles and the prime targets for improvements in efficiency water nutrient transportation. Their function is to maintain cellular homeostasis by controlling ionic movements across channels from roots upper plant parts, xylem loading remobilization sugar molecules photosynthesis tissues leaf (source) roots, stem seeds (sink) via phloem loading. plant's entire source-to-sink relationship regulated multiple transporting a highly sophisticated manner driven based on different stages growth development (PG&D) environmental changes. MTs play pivotal role PG&D terms increased height, branches/tiller numbers, enhanced length filled panicles per plant, seed yield grain quality. Dynamic climatic changes disturbed balance (salt, drought heavy metals) supply (cold heat stress) plants. Due poor selectivity, some also uptake toxic elements negatively impact later exported parts where they deteriorate As an adaptive strategy, response salt metals, plants activate plasma membranes vacuolar membrane-localized that export into vacuole translocate root's tips shoot. However, case drought, cold stresses, supplies all organs. In this review, we mainly review recent literature Arabidopsis, halophytes major field crops such as rice, wheat, maize oilseed rape order argue global PG&D, abiotic stress tolerance. We discussed gene expression level genomic variations species well family developmental cues.

Language: Английский

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Melatonin regulates antioxidant strategy in response to continuous salt stress in rice seedlings

Plant Physiology and Biochemistry, Journal Year: 2021, Volume and Issue: 165, P. 239 - 250

Published: May 19, 2021

Language: Английский

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Crosstalk between Melatonin and Reactive Oxygen Species in Plant Abiotic Stress Responses: An Update

International Journal of Molecular Sciences, Journal Year: 2022, Volume and Issue: 23(10), P. 5666 - 5666

Published: May 18, 2022

Melatonin acts as a multifunctional molecule that takes part in various physiological processes, especially the protection against abiotic stresses, such salinity, drought, heat, cold, heavy metals, etc. These stresses typically elicit reactive oxygen species (ROS) accumulation. Excessive ROS induce oxidative stress and decrease crop growth productivity. Significant advances melatonin initiate complex antioxidant system modulates homeostasis plants. Numerous evidences further reveal often cooperates with other signaling molecules, ROS, nitric oxide (NO), hydrogen sulfide (H2S). The interaction among melatonin, NO, H2S, orchestrates responses to via networks, thus conferring plant tolerance. In this review, we summarize roles of establishing redox through current progress interactions higher stresses. We highlight vital role respiratory burst oxidase homologs (RBOHs) during these processes. complicated integration occurs between plants is also discussed.

Language: Английский

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Melatonin Enhances Seed Germination and Seedling Growth of Medicago sativa Under Salinity via a Putative Melatonin Receptor MsPMTR1

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

Published: Aug. 17, 2021

Alfalfa ( Medicago sativa L.) is an important forage crop, and salt stress a major limiting factor in its yield. Melatonin (MT) multi-regulatory molecule plants. We showed that basal MT content was positively correlated with the tolerance degree of different alfalfa varieties. precursor 5-HT fully recovered seed germination while partially ameliorated seedling growth salt-stressed alfalfa. The some divergent effects from regards to amelioration under salinity. Salt caused stunted plant soil culture, it by elevating height, fresh weight, branching number, chlorophyll content. Silencing putative receptor, MsPMTR1 , which shown be membrane-localized, abolished ameliorative on growth, overexpression improved stress. RNA sequencing analysis nine pathway genes were specifically induced treatment compared These MT-responsive differentially expressed include metabolic genes, such as “ribosome, elongation factor,” “sugar lipid metabolism,” “photosynthesis” stress-related encoding “membrane integrity” related proteins, heat shock protein, peroxidase/oxidoreductase, protease. Several abiotic response-related DRE ARF HD-ZF MYB REM repressed NaCl treatment. In summary, we demonstrated importance MT-mediated alfalfa, also analyzed regulatory mechanism during

Language: Английский

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Zinc Oxide Nanoparticles Improve Salt Tolerance in Rice Seedlings by Improving Physiological and Biochemical Indices

Agriculture, Journal Year: 2022, Volume and Issue: 12(7), P. 1014 - 1014

Published: July 13, 2022

Understanding the salinity stress mechanisms is essential for crop improvement and sustainable agriculture. Salinity prepotent abiotic compared with other stresses that decrease growth development, reducing production creating food security-related threats. Therefore, input of metal oxide nanoparticles (NPs) such as zinc (ZnO-NPs) can improve salt tolerance in plants, especially early stage growth. aim current study was to evaluate impact ZnO-NPs on inducing two rice (Oryza sativa L.) genotypes seedlings. An undocumented landrace (Kargi) basmati (CSR 30) seeds were grown a hydroponic system weeks without 50 mg/L concentrations various doses NaCl (0, 60, 80, 100 mM). Both Kargi (15.95–42.49%) CSR 30 (15.34–33.12%) showed reduction plant height photosynthetic pigments (chlorophyll b, carotenoids, total chlorophyll), Zn content, K+ uptake under condition, control On hand, upregulated proline, malondialdehyde (MDA), Na+ antioxidant enzyme activities—namely, those superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT), glutathione reductase (GR)—in both O. over control. However, ZnO-NP-treated (Kargi restored pigment accumulation level, reforming stomata trichome morphology, also increased enzymes SOD, APX, CAT, GR activity, which alleviated oxidative stress, while level MDA, H2O2 condition. The present findings suggest adding could mitigate by upregulating antioxidative enhancing cultivation salinity-affected areas.

Language: Английский

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Synergistic Effects of Salicylic Acid and Melatonin on Modulating Ion Homeostasis in Salt-Stressed Wheat (Triticum aestivum L.) Plants by Enhancing Root H+-Pump Activity

Plants, Journal Year: 2022, Volume and Issue: 11(3), P. 416 - 416

Published: Feb. 2, 2022

Salicylic acid (SA) and melatonin (MT) have been shown to play important roles in plant salt tolerance. However, the underlying mechanisms of SA-MT-interaction-mediated ionic homeostasis salt-stressed plants are unknown. As a first investigation, this study aimed clarify how SA-MT interaction affects H+-pump activity maintaining desired ion under saline conditions its relation ROS metabolism. Wheat (Triticum aestivum L.) were grown non-saline or foliar sprayed with 75 mg L-1 SA 70 μM MT. The SA+MT combined treatment significantly increased N, P, K+, Fe, Zn, Cu acquisition, accompanied by lower Na+ accumulation compared non-stressed ones. Additionally, it enhanced ATP content roots. mitigation was also detected reduced superoxide radical content, electrolyte leakage, lipoxygenase activity, as well dismutase, catalase, peroxidase, polyphenol oxidase activities; K+/Na+, Ca2+/Na+, Mg2+/Na+ ratios; relative water content; membrane stability index; free amino treated plants. novel evidence shows that higher root is tolerance mechanism increases via homeostasis.

Language: Английский

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Melatonin as a regulator of plant ionic homeostasis: implications for abiotic stress tolerance

Journal of Experimental Botany, Journal Year: 2022, Volume and Issue: 73(17), P. 5886 - 5902

Published: May 30, 2022

Abstract Melatonin is a highly conserved and ubiquitous molecule that operates upstream of broad array receptors in animal systems. Since melatonin was discovered plants 1995, hundreds papers have been published revealing its role plant growth, development, adaptive responses to the environment. This paper summarizes current state knowledge melatonin’s involvement regulating ion homeostasis abiotic stress tolerance. The major topics covered here are: (i) control H+-ATPase activity implication for various stresses; (ii) regulation reactive oxygen species (ROS)–Ca2+ hub by signaling; (iii) ionic via hormonal cross-talk. We also show properties allow direct scavenging ROS, thus preventing negative effects ROS-induced activation channels. above ‘desensitization’ may play critical stress-induced K+ loss from cytosol as well maintaining basic levels cytosolic Ca2+ required optimal cell operation. Future studies should focus on molecular identity transporters could be directly regulated providing bioinformatic analysis evolutionary aspects sensing signaling.

Language: Английский

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Exogenous Melatonin Promotes the Salt Tolerance by Removing Active Oxygen and Maintaining Ion Balance in Wheat (Triticum aestivum L.)

Frontiers in Plant Science, Journal Year: 2022, Volume and Issue: 12

Published: Jan. 31, 2022

Melatonin (MT) is a small molecule indole hormone that plays an important role in the regulation of biological processes and abiotic stress resistance. Previous studies have confirmed MT promotes normal development plants under by mediating physiological mechanisms. However, mechanism exogenous regulating seed germination seedling growth wheat salt still unclear. In this study, NaCl decreased rate inhibited wheat, but shoot length, root plant weight SM15 did not change significantly. The addition 300 μM cultivation solution directly promoted ZM18, lateral production, JM22 length germ radicle three varieties stress. For seedling, application could increase proline content, soluble protein, sugar, Ca2+ vital amino acid content leaves to keep high water low level H2O2 [K+]/[Na+] ratio. increased vigor ratio induced conclusion, enhanced tolerance seeds seedlings synthesis protein ion compartmentation roots leaves, enhancement enzymatic systems, changes levels. Salt resistance varied with different same environmental condition. was higher salt-resistant variety salt-sensitive one. should consider differences among during sowing stages.

Language: Английский

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