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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Titanium Dioxide Nanoparticles Improve Growth and Enhance Tolerance of Broad Bean Plants under Saline Soil Conditions

Land Degradation and Development, Journal Year: 2017, Volume and Issue: 29(4), P. 1065 - 1073

Published: Aug. 17, 2017

Abstract Soil salinity is established as one of the major environmental problems, decreasing crop productivity worldwide, thereby threatening sustainable agriculture. In present study, we evaluated effects titanium dioxide nanoparticles (nTiO 2 ) for ameliorating soil in broad bean, an important leguminous crop. As nTiO known to have pro‐oxidant and antioxidant properties, three different concentrations (0·01%, 0·02% 0·03%) were compared with respect plant growth stress responses. The 0·01% application significantly increased shoot length, leaf area root dry weight plants under normal conditions. These growth‐promoting simultaneous levels chlorophyll b, soluble sugars proline enhanced activities enzymes. Under saline conditions, although level enzymatic increased, reduced. supplementation antioxidants sugars, amino acids salt‐affected versus subjected alone. Thus, enzyme contributed observed reduction hydrogen peroxide malondialdehyde contents, while other metabolites osmoprotection, collectively resulting significant improvement salinity. Furthermore, ‐mediated positive concentration dependent being most effective, whereas showed intermediate response 0·03% was almost ineffective both control Our findings provide a foundation improving cultivated on naturally contaminated soils. Copyright © 2017 John Wiley & Sons, Ltd.

Language: Английский

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Melatonin systemically ameliorates drought stress‐induced damage in Medicago sativa plants by modulating nitro‐oxidative homeostasis and proline metabolism

Journal of Pineal Research, Journal Year: 2017, Volume and Issue: 62(4)

Published: Feb. 22, 2017

Recent reports have uncovered the multifunctional role of melatonin in plant physiological responses under optimal and suboptimal environmental conditions. In this study, we explored whether pretreatment could provoke priming effects alfalfa (Medicago sativa L.) plants subsequently exposed to prolonged drought stress (7 days), by withholding watering. Results revealed that rhizospheric application (10 μmol L-1 ) remarkably enhanced tolerance plants, as evidenced observed tolerant phenotype, well higher levels chlorophyll fluorescence stomatal conductance, compared with nontreated drought-stressed plants. addition, lower lipid peroxidation (MDA content) both H2 O2 NO contents primed nonprimed stressed suggest resulted systemic mitigation drought-induced nitro-oxidative stress. Nitro-oxidative homeostasis was achieved through regulation reactive oxygen (SOD, GR, CAT, APX) nitrogen species (NR, NADHde) metabolic enzymes at enzymatic and/or transcript level. Moreover, limitation cellular redox disruption mRNA antioxidant redox-related components (ADH, AOX, GST7, GST17), via osmoprotection proline homeostasis, (P5CS) gene expression level (P5CS, P5CR). Overall, novel results highlight importance a promising agent for enhancement conditions osmoprotective homeostasis.

Language: Английский

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Contribution of Exogenous Proline to Abiotic Stresses Tolerance in Plants: A Review

International Journal of Molecular Sciences, Journal Year: 2022, Volume and Issue: 23(9), P. 5186 - 5186

Published: May 6, 2022

Abiotic stresses are the major environmental factors that play a significant role in decreasing plant yield and production potential by influencing physiological, biochemical, molecular processes. global population growth have prompted scientists to use beneficial strategies ensure food security. The of organic compounds improve tolerance abiotic has been considered for many years. For example, application external osmotic protective such as proline is one approaches counteract adverse effects on plants. Proline level increases plants response stress. accumulation not just signal tension. Rather, according research discussed this article, biomolecule improves resistance stress rising photosynthesis, enzymatic non-enzymatic antioxidant activity, regulating osmolyte concentration, sodium potassium homeostasis. In review, we discuss biosynthesis, sensing, signaling, transport its development various tissues, including seeds, floral components, vegetative tissues. Further, impacts exogenous utilization under non-living drought, salinity, high low temperatures, heavy metals extensively studied. Numerous studies shown can growth, yield, factors.

Language: Английский

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Effects of individual and combined effects of salinity and drought on physiological, nutritional and biochemical properties of cabbage (Brassica oleracea var. capitata)

Scientia Horticulturae, Journal Year: 2018, Volume and Issue: 240, P. 196 - 204

Published: June 14, 2018

Language: Английский

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Seed priming in field crops: potential benefits, adoption and challenges

Crop and Pasture Science, Journal Year: 2019, Volume and Issue: 70(9), P. 731 - 731

Published: Jan. 1, 2019

Seed priming is a presowing technique in which seeds are moderately hydrated to the point where pregermination metabolic processes begin without actual germination. Seeds then redried near their weight for normal handling. can be soaked tap water (hydropriming), aerated low-water potential solutions of polyethylene glycol or salt (KNO3, KH2PO4, KCl, NaCl, CaCl2 MgSO4; osmopriming), plant growth regulators, polyamines (hormonal priming), growth-promoting bacteria (biopriming), macro micronutrients (nutripriming) some plant-based natural extracts. Here, we review: (1) seed as simple and effective approach improving stand establishment, economic yields tolerance biotic abiotic stresses various crops by inducing series biochemical, physiological, molecular subcellular changes plants; (2) tendency reduce longevity high-vigour improve low-vigour seeds; (3) advantages physical methods enhance production over conventional based on application different chemical substances; (4) (e.g. magneto-priming ionising radiation, including gamma rays, ultraviolet (UV) rays (UVA, UVC) X-rays) available that most promising treatments crop productivity under stressful conditions; (5) techniques micronutrient delivery at planting field crops. cost-effective being used countries yield, complementary strategy grain biofortification genetically improved varieties performance stress conditions, submergence low phosphorus. Some challenges broad commercial adaption include after types ambient storage conditions lack studies hermetic packaging materials extended storage.

Language: Английский

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Copper Nanoparticle Application Enhances Plant Growth and Grain Yield in Maize Under Drought Stress Conditions

Journal of Plant Growth Regulation, Journal Year: 2021, Volume and Issue: 41(1), P. 364 - 375

Published: Feb. 2, 2021

Language: Английский

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Heat or cold priming-induced cross-tolerance to abiotic stresses in plants: key regulators and possible mechanisms

PROTOPLASMA, Journal Year: 2017, Volume and Issue: 255(1), P. 399 - 412

Published: Aug. 3, 2017

Language: Английский

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Soil and Crop Management Practices to Minimize the Impact of Waterlogging on Crop Productivity

Frontiers in Plant Science, Journal Year: 2019, Volume and Issue: 10

Published: Feb. 12, 2019

Waterlogging remains a significant constraint to cereal production across the globe in areas with high rainfall and/or poor drainage. Improving tolerance of plants waterlogging is most economical way tackling problem. However, combined agronomic, engineering and genetic solutions will be more effective. A wide range agronomic are currently being used by grain growers reduce losses from waterlogging. In this scoping study, we reviewed effects on plant growth, advantages disadvantages various which mitigate damage. Further research should focused on: cost/benefit analyses different drainage strategies; understanding mechanisms nitrogen loss during quantifying benefits application; increasing soil profile de-watering through improvement revealing specificity interaction between management practices environment as well among practices; importantly, genetic, strategies for varying environments.

Language: Английский

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Hormesis in plants: Physiological and biochemical responses

Ecotoxicology and Environmental Safety, Journal Year: 2020, Volume and Issue: 207, P. 111225 - 111225

Published: Sept. 8, 2020

Hormesis is a favorable response to low level exposures substance or adverse conditions. This phenomenon has become target achieve greater crop productivity. review aimed address the physiological mechanisms for induction of hormesis in plants. Some herbicides present hormetic dose response. Among them, those with active ingredients glyphosate, 2,4-D and paraquat. The application glyphosate as promoter therefore showing promess . Glyphosate prominent role shikimic acid pathway, decreasing lignin synthesis resulting improved growth productivity several crops. Further studies are still needed estimate optimal doses other crops agricultural interest. Biostimulants also important, since they promote effects on secondary metabolic pathways production reactive oxygen species (ROS). When ROS produced, hydrogen peroxide act signaling molecule that cell walls malleability allowing inward water transport causing expansion. Plants'ability overcome abiotic stress conditions desirable avoid losses economic losses. compiles information how plants can be used new levels.

Language: Английский

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