Reactive Oxygen Species and Antioxidant Defense in Plants under Abiotic Stress: Revisiting the Crucial Role of a Universal Defense Regulator

Antioxidants, Journal Year: 2020, Volume and Issue: 9(8), P. 681 - 681

Published: July 29, 2020

Global climate change and associated adverse abiotic stress conditions, such as drought, salinity, heavy metals, waterlogging, extreme temperatures, oxygen deprivation, etc., greatly influence plant growth development, ultimately affecting crop yield quality, well agricultural sustainability in general. Plant cells produce radicals their derivatives, so-called reactive species (ROS), during various processes with stress. Moreover, the generation of ROS is a fundamental process higher plants employs to transmit cellular signaling information response changing environmental conditions. One most crucial consequences disturbance equilibrium between antioxidant defense systems triggering excessive accumulation inducing oxidative plants. Notably, detoxification maintained by both enzymatic nonenzymatic under harsh stresses. Although this field research has attracted massive interest, it largely remains unexplored, our understanding poorly understood. In review, we have documented recent advancement illustrating harmful effects ROS, system involved different stresses, molecular cross-talk other important signal molecules nitrogen, sulfur, carbonyl species. addition, state-of-the-art approaches ROS-mediated improvement acclimation against stresses also been discussed.

Language: Английский

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Climate change regulated abiotic stress mechanisms in plants: a comprehensive review

Plant Cell Reports, Journal Year: 2021, Volume and Issue: 41(1), P. 1 - 31

Published: Aug. 5, 2021

Language: Английский

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Melatonin Improves Drought Stress Tolerance of Tomato by Modulating Plant Growth, Root Architecture, Photosynthesis, and Antioxidant Defense System

Antioxidants, Journal Year: 2022, Volume and Issue: 11(2), P. 309 - 309

Published: Feb. 3, 2022

Tomato is an important vegetable that highly sensitive to drought (DR) stress which impairs the development of tomato seedlings. Recently, melatonin (ME) has emerged as a nontoxic, regulatory biomolecule regulates plant growth and enhances DR tolerance mechanism in plants. The present study was conducted examine defensive role ME photosynthesis, root architecture, antioxidant enzymes' activities seedlings subjected stress. Our results indicated strongly suppressed biomass production, inhibited negatively affected morphology, reduced photosynthetic pigments Per contra, soluble sugars, proline, ROS (reactive oxygen species) were suggested be improved under Conversely, (100 µM) pretreatment detrimental-effect by restoring chlorophyll content, gas exchange parameters attributes compared with DR-group only. Moreover, supplementation also mitigated enzymes [APX (ascorbate peroxidase), CAT (catalase), DHAR (dehydroascorbate reductase), GST (glutathione S-transferase), GR MDHAR (monodehydroascorbate POD (peroxidase), SOD (superoxide dismutase)], non-enzymatic [AsA (ascorbate), DHA (dehydroascorbic acid), GSH (glutathione), GSSG, (oxidized glutathione)] activities, oxidative damage [EL (electrolyte leakage), H2O2 (hydrogen peroxide), MDA (malondialdehyde), O2•- ion)] osmoregulation (soluble sugars proline) seedlings, regulating gene expression for SOD, CAT, APX, GR, POD, GST, DHAR, MDHAR. These findings determine could efficiently improve growth, characteristics, leaf photosynthesis machinery thereby increasing seedlings' adaptability

Language: Английский

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Emerging roles of melatonin in mitigating abiotic and biotic stresses of horticultural crops

Scientia Horticulturae, Journal Year: 2020, Volume and Issue: 272, P. 109592 - 109592

Published: July 9, 2020

Language: Английский

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Melatonin-Induced Salinity Tolerance by Ameliorating Osmotic and Oxidative Stress in the Seedlings of Two Tomato (Solanum lycopersicum L.) Cultivars

Journal of Plant Growth Regulation, Journal Year: 2020, Volume and Issue: 40(5), P. 2236 - 2248

Published: Nov. 24, 2020

Language: Английский

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Exogenous melatonin alleviates salt stress by improving leaf photosynthesis in rice seedlings

Plant Physiology and Biochemistry, Journal Year: 2021, Volume and Issue: 163, P. 367 - 375

Published: April 21, 2021

Language: Английский

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Alleviation of drought and salt stress in vegetables: crop responses and mitigation strategies

Plant Growth Regulation, Journal Year: 2022, Volume and Issue: 99(2), P. 177 - 194

Published: Oct. 25, 2022

Abstract In recent decades, the demand for vegetables has increased significantly due to blooming global population. Climate change affected vegetable production by increasing frequencies and severity of abiotic biotic stresses. Among stresses, drought salinity are major issues that possess severe threats on production. Many (e.g., carrot, tomato, okra, pea, eggplant, lettuce, potato) usually sensitive salt stress. The defence mechanisms plants against stress have been extensively studied in model plant species field crops. Better understanding susceptibility stresses will help towards development more tolerant genotypes as a long-term strategy these However, intensity challenges also warrants immediate approaches mitigate enhance short term. Therefore, this review enlightens updated knowledge responses (physiological molecular) potentially effective strategies Moreover, we summarized different technologies such seed priming, genetic transformation, biostimulants, nanotechnology, cultural practices adopted under We propose conventional breeding, engineering, crop management should be combined generate resistance cultivars adopt smart cultivation sustainable changing climate.

Language: Английский

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Reactive oxygen species signaling in melatonin-mediated plant stress response

Plant Physiology and Biochemistry, Journal Year: 2024, Volume and Issue: 207, P. 108398 - 108398

Published: Jan. 24, 2024

Language: Английский

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Melatonin alleviates salt damage in tomato seedling: A root architecture system, photosynthetic capacity, ion homeostasis, and antioxidant enzymes analysis

Scientia Horticulturae, Journal Year: 2021, Volume and Issue: 285, P. 110145 - 110145

Published: April 3, 2021

Language: Английский

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Phytomelatonin: An overview of the importance and mediating functions of melatonin against environmental stresses

Physiologia Plantarum, Journal Year: 2020, Volume and Issue: 172(2), P. 820 - 846

Published: Nov. 7, 2020

Abstract Recently, melatonin has gained significant importance in plant research. The presence of the kingdom been known since 1995. It is a molecule that conserved wide array evolutionary distant organisms. Its functions and characteristics have found to be similar both plants animals. review focuses on role pertaining physiological higher plants. Melatonin regulates regarding auxin activity, root, shoot, explant growth, activates germination seeds, promotes rhizogenesis (growth adventitious lateral roots), holds up impelled leaf senescence. natural bio‐stimulant creates resistance field crops against various abiotic stress, including heat, chemical pollutants, cold, drought, salinity, harmful ultra‐violet radiation. full potential regulating still needs explored by further

Language: Английский

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