Melatonin-Mediated Abiotic Stress Tolerance in Plants

Frontiers in Plant Science, Journal Year: 2022, Volume and Issue: 13

Published: May 9, 2022

Melatonin is a multi-functional molecule that ubiquitous in all living organisms. performs essential roles plant stress tolerance; its application can reduce the harmful effects of abiotic stresses. Plant melatonin biosynthesis, which usually occurs within chloroplasts, and related metabolic pathways have been extensively characterized. regulates responses by directly inhibiting accumulation reactive oxygen nitrogen species, indirectly affecting response pathways. In this review, we summarize recent research concerning metabolism, antioxidation; focus on melatonin-mediated tolerance to stresses including drought, waterlogging, salt, heat, cold, heavy metal toxicity, light others. We also examine exogenous treatment plants under stress. Finally, discuss future perspectives applications plants.

Language: Английский

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Exogenous melatonin induces salt and drought stress tolerance in rice by promoting plant growth and defense system

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Jan. 12, 2024

Abstract Due to global climate change, crops are certainly confronted with a lot of abiotic and biotic stress factors during their growth that cause serious threat development overall productivity. Among different stresses, salt drought considered the most devastating stressors impact on crop’s yield stability. Here, current study aimed elucidate how melatonin works in regulating plant biomass, oxidative stress, antioxidant defense system, as well expression genes related rice plants. Eight groups plants (3 replicates, 5 each) underwent varied treatments: control, melatonin, salt, drought, + melatonin. Melatonin (100 µM) was alternately applied week before exposure; received 100 mM NaCl every 3 days for weeks, involved 10% PEG. Young leaves were randomly sampled from each group. The results showed treatment markedly reduces damage by promoting root, shoot length, fresh dry weight, increasing chlorophyll contents, inhibiting excessive production markers. Salt significantly decreased water balance, damaged cell membrane reducing relative contents electrolyte leakage. However, treated high low Under conditions, exogenous application boosted level responsive like OsSOS , OsNHX OsHSF OsDREB Taken together, our reveal increases tolerance plants, suppressing ROS accumulation, elevating antioxidants efficiency, up-regulating genes.

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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Exogenous Melatonin Alleviates Alkaline Stress by Removing Reactive Oxygen Species and Promoting Antioxidant Defence in Rice Seedlings

Frontiers in Plant Science, Journal Year: 2022, Volume and Issue: 13

Published: March 9, 2022

Saline-alkali stress seriously restricts rice growth, development, and production in northern China. The damage of alkaline on is much greater than that salt due to ion toxicity, osmotic stress, especially high pH. As a signal molecule, melatonin (N-acetyl-5-methoxytryptamine, MT) mediates many physiological processes participates protecting from abiotic stress. potential mechanism exogenous melatonin-mediated tolerance still largely unknown. In this study, the effects morphological change, property, corresponding genes expression seedlings were analyzed under (20 mmol L-1, pH 9.55). results showed levels MT synthesis (TDC2, T5H, SNAT, ASMT1, ASMT2) induced by both treatment. cell membrane was protected MT, furtherly play role scavenging reactive oxygen species (ROS), reducing lipoxygenase (LOX) activity, malondialdehyde (MDA) content. ROS attributed coupling improvement redox homeostasis enhancement antioxidant enzyme activity content upregulating transcriptional antioxidase genes. meantime, pretreatment promoted accumulation free proline, sucrose, fructose regulating OsP5CS, OsSUS7, OsSPS1 gene level increased chlorophyll synthesis-related Ultimately, alleviating effect reflected increasing leaf relative water (RWC) root-shoot ratio tip wilt index (TWI) through series biochemical changes. Melatonin changed which might contribute rice, consequently, activated system seedlings. Our study comprehensively understands

Language: Английский

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Melatonin Enhances Drought Tolerance in Rice Seedlings by Modulating Antioxidant Systems, Osmoregulation, and Corresponding Gene Expression

International Journal of Molecular Sciences, Journal Year: 2022, Volume and Issue: 23(20), P. 12075 - 12075

Published: Oct. 11, 2022

Rice is the third largest food crop in world, especially Asia. Its production various regions affected to different degrees by drought stress. Melatonin (MT), a novel growth regulator, plays an essential role enhancing stress resistance crops. Nevertheless, underlying mechanism which melatonin helps mitigate damage rice remains unclear. Therefore, present study, seedlings pretreated with (200 μM) were stressed (water potential of -0.5 MPa). These subsequently examined for their phenotypes and physiological molecular properties, including metabolite contents, enzyme activities, corresponding gene expression levels. The findings demonstrated that induced increase malondialdehyde (MDA) levels, lipoxygenase (LOX) activity, reactive oxygen species (ROS, e.g., O2- H2O2) seedlings. However, application significantly reduced LOX activity MDA ROS contents (O2- rate H2O2 content), decrease 29.35%, 47.23%, (45.54% 49.33%), respectively. It activated ALM1, OsPOX1, OsCATC, OsAPX2, increased antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate (APX), Meanwhile, pretreatment enhanced proline, fructose, sucrose content inducing OsP5CS, OsSUS7, OsSPS1 Moreover, considerably up-regulated levels synthesis genes TDC2 ASMT1 under 7-fold 5-fold, approximately. improvements reflected relative water (RWC) root-shoot ratio drought-stressed received application. Consequently, adverse effects on improved rice's ability tolerate primarily boosting endogenous osmoregulation abilities.

Language: Английский

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Exogenous melatonin increases salt tolerance in bitter melon by regulating ionic balance, antioxidant system and secondary metabolism-related genes

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

Published: July 30, 2022

Abstract Background Melatonin is a multi-functional molecule widely employed in order to mitigate abiotic stress factors, general and salt particular. Even though previous reports revealed that melatonin could exhibit roles promoting seed germination protecting plants during various developmental stages of several plant species under stress, no are available with respect the regulatory acts on physiological biochemical status as well expression levels defense- secondary metabolism-related related transcripts bitter melon subjected stress. Results Herewith present study, we performed comprehensive analysis ion balance, antioxidant system, transcript defense-related genes ( WRKY1 , SOS1, PM H + -ATPase, SKOR, Mc5PTase7 SOAR1 ) gene MAP30, α-MMC polypeptide-P PAL salt-stressed Momordica charantia L.) response treatment. In this regard, different (0, 75 150 µM) were applied salinity 50 100 mM NaCl) melon. Accordingly, findings decreased growth photosynthesis parameters (SPAD, Fv / Fo Y(II)), RWC, some nutrient elements (K Ca 2+ P), while it increased Y(NO), Y(NPQ), proline, Na Cl − 2 O MDA, enzyme activity, lead induction examined genes. However, prsiming µM SPAD, K P concentration MDA addition, system by (150 µM). Conclusions Overall, can be postulated application has effective alleviating adverse impacts through critical modifications metabolism.

Language: Английский

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Melatonin and arginine combined supplementation alleviate salt stress through physiochemical adjustments and improved antioxidant enzymes activity in Capsicum annuum L.

Scientia Horticulturae, Journal Year: 2023, Volume and Issue: 321, P. 112270 - 112270

Published: June 22, 2023

Language: Английский

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Alleviating sweetpotato salt tolerance through exogenous glutathione and melatonin: A profound mechanism for active oxygen detoxification and preservation of photosynthetic organs

Chemosphere, Journal Year: 2024, Volume and Issue: 350, P. 141120 - 141120

Published: Jan. 8, 2024

Language: Английский

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Enhancement of sweetpotato tolerance to chromium stress through melatonin and glutathione: Insights into photosynthetic efficiency, oxidative defense, and growth parameters

Plant Physiology and Biochemistry, Journal Year: 2024, Volume and Issue: 208, P. 108509 - 108509

Published: March 1, 2024

Language: Английский

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Melatonin-Mediated Molecular Responses in Plants: Enhancing Stress Tolerance and Mitigating Environmental Challenges in Cereal Crop Production

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(8), P. 4551 - 4551

Published: April 21, 2024

Cereal crops are crucial for global food security; however, they susceptible to various environmental stresses that significantly hamper their productivity. In response, melatonin has emerged as a promising regulator, offering potential benefits stress tolerance and crop growth. This review explores the effects of on maize, sorghum, millet, rice, barley, wheat, aiming enhance resilience stress. The application shown outcomes, improving water use efficiency reducing transpiration rates in millet under drought conditions. Furthermore, it enhances salinity heavy metal by regulating activity stress-responsive genes. Similarly, sorghum its resistance high temperatures, low humidity, nutrient deficiency, potentially involving modulation antioxidant defense aspects related photosynthetic Melatonin also exerts protective against drought, salinity, metal, extreme waterlogging barley decreasing reactive oxygen species (ROS) production through system. molecular reactions upregulated photosynthesis, mechanisms, metabolic pathway, genes downregulated susceptibility conclusion, serves versatile tool cereal crops, bolstering promoting sustainable development. Further investigations warranted elucidate underlying mechanisms refine techniques fully harness role systems.

Language: Английский

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