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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Regulation of Ascorbate-Glutathione Pathway in Mitigating Oxidative Damage in Plants under Abiotic Stress

Antioxidants, Journal Year: 2019, Volume and Issue: 8(9), P. 384 - 384

Published: Sept. 9, 2019

Reactive oxygen species (ROS) generation is a usual phenomenon in plant both under normal and stressed condition. However, unfavorable or adverse conditions, ROS production exceeds the capacity of antioxidant defense system. Both non-enzymatic enzymatic components system either detoxify scavenge mitigate their deleterious effects. The Ascorbate-Glutathione (AsA-GSH) pathway, also known as Asada-Halliwell pathway comprises AsA, GSH, four enzymes viz. ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate glutathione play vital role detoxifying ROS. Apart from detoxification, they interact with other systems plants protect various abiotic stress-induced damages. Several studies revealed that upregulation overexpression AsA-GSH enhancement AsA GSH levels conferred better tolerance to stresses by reducing In this review, we summarize recent progress research on terms oxidative stress plants. We focus mechanisms well molecular interactions.

Language: Английский

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Cadmium stress in plants: A critical review of the effects, mechanisms, and tolerance strategies

Critical Reviews in Environmental Science and Technology, Journal Year: 2020, Volume and Issue: 52(5), P. 675 - 726

Published: Nov. 5, 2020

Cadmium accumulation in crops and the possibility of Cd entering food chain are serious concerns for public health. This review discusses deleterious effects plants tolerance resistance mechanisms that evolved to help mitigate cadmium toxicity. reduces seed germination, early seedling growth, plant biomass. It causes changes photosynthesis, relative water content, transpiration rate, stomatal conductance, electrolyte leakage. activates reactive oxygen species induce chromosomal aberrations, gene mutations, DNA damage affect cell cycle division. In response, have applied several adaptive strategies overcome reduce toxic Cd. The primary detoxification exclusion specific parts. Plants also adapt toxicity with signaling pathways regulate survival growth under stress. Other such as synthesis hormones, activation antioxidant system production phytochelatins proline extremely helpful Furthermore, soil microorganisms play a crucial role toward by decreasing metal phytoavailability increasing morphological physiological parameters plant.

Language: Английский

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Regulation of ROS Metabolism in Plants under Environmental Stress: A Review of Recent Experimental Evidence

International Journal of Molecular Sciences, Journal Year: 2020, Volume and Issue: 21(22), P. 8695 - 8695

Published: Nov. 18, 2020

Various environmental stresses singly or in combination generate excess amounts of reactive oxygen species (ROS), leading to oxidative stress and impaired redox homeostasis. Generation ROS is the obvious outcome abiotic gaining importance not only for their ubiquitous generation subsequent damaging effects plants but also diversified roles signaling cascade, affecting other biomolecules, hormones concerning growth, development, regulation tolerance. Therefore, a good balance between antioxidant defense system protects photosynthetic machinery, maintains membrane integrity, prevents damage nucleic acids proteins. Notably, scavenges regulates titer signaling. A glut studies have been executed over last few decades discover pattern scavenging. Reports suggested sharp threshold level being beneficial toxic, depending on plant species, growth stages, types stresses, intensity, duration. Approaches towards enhancing one vital areas research biologists. this review, we accumulated discussed physicochemical basis production, cellular compartment-specific pathways, possible distressing effects. Moreover, function detoxification homeostasis maximizing light latest endeavors experimental evidence.

Language: Английский

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Impact of co-inoculation with plant-growth-promoting rhizobacteria and rhizobium on the biochemical responses of alfalfa-soil system in copper contaminated soil

Ecotoxicology and Environmental Safety, Journal Year: 2018, Volume and Issue: 167, P. 218 - 226

Published: Oct. 17, 2018

Language: Английский

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Biostimulants for the Regulation of Reactive Oxygen Species Metabolism in Plants under Abiotic Stress

Cells, Journal Year: 2021, Volume and Issue: 10(10), P. 2537 - 2537

Published: Sept. 25, 2021

Global food security for a growing population with finite resources is often challenged by multiple, simultaneously occurring on-farm abiotic stresses (i.e., drought, salinity, low and high temperature, waterlogging, metal toxicity, etc.) due to climatic uncertainties variability. Breeding multiple stress tolerance long-term solution, though developing multiple-stress-tolerant crop varieties still challenge. Generation of reactive oxygen species in plant cells common response under diverse which play dual role signaling molecules or damaging agents depending on concentration. Thus, delicate balance generation may improve health, depends the natural antioxidant defense system plants. Biostimulants represent promising type environment-friendly formulation based products that are frequently used exogenously enhance tolerance. In this review, we illustrate potential biostimulants activity major plants conditions their other roles management stresses. have overcome oxidative stress, wider applicability tightly regulated dose, growth stage, variety biostimulants. However, these limitations can be understanding biostimulants’ interaction ROS

Language: Английский

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Citric Acid-Mediated Abiotic Stress Tolerance in Plants

International Journal of Molecular Sciences, Journal Year: 2021, Volume and Issue: 22(13), P. 7235 - 7235

Published: July 5, 2021

Several recent studies have shown that citric acid/citrate (CA) can confer abiotic stress tolerance to plants. Exogenous CA application leads improved growth and yield in crop plants under various conditions. Improved physiological outcomes are associated with higher photosynthetic rates, reduced reactive oxygen species, better osmoregulation. Application of also induces antioxidant defense systems, promotes increased chlorophyll content, affects secondary metabolism limit plant restrictions stress. In particular, has a major impact on relieving heavy metal by promoting precipitation, chelation, sequestration ions. This review summarizes the mechanisms mediate CA-regulated changes plants, primarily CA’s involvement control molecular processes We genetic engineering strategies for CA-mediated tolerance. Finally, we propose model explain how position complex metabolic networks involving biosynthesis phytohormones, amino acids, signaling molecules, other metabolites could some its stress-ameliorating properties. our current understanding highlights areas where additional research is needed.

Language: Английский

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Mechanistic Insights of Plant Growth Promoting Bacteria Mediated Drought and Salt Stress Tolerance in Plants for Sustainable Agriculture

International Journal of Molecular Sciences, Journal Year: 2022, Volume and Issue: 23(7), P. 3741 - 3741

Published: March 29, 2022

Climate change has devastating effects on plant growth and yield. During ontogenesis, plants are subjected to a variety of abiotic stresses, including drought salinity, affecting the crop loss (20–50%) making them vulnerable in terms survival. These stresses lead excessive production reactive oxygen species (ROS) that damage nucleic acid, proteins, lipids. Plant growth-promoting bacteria (PGPB) have remarkable capabilities combating salinity stress improving growth, which enhances productivity contributes food security. PGPB inoculation under promotes through several modes actions, such as phytohormones, 1-aminocyclopropane-1-carboxylic acid deaminase, exopolysaccharide, siderophore, hydrogen cyanide, extracellular polymeric substances, volatile organic compounds, modulate antioxidants defense machinery, abscisic thereby preventing oxidative stress. also provide osmotic balance; maintain ion homeostasis; induce salt-responsive genes, metabolic reprogramming, transcriptional changes transporter etc. Therefore, this review, we summarize mitigate its detrimental effects. Furthermore, discuss mechanistic insights towards tolerance for sustainable agriculture.

Language: Английский

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Nickel (Ni) phytotoxicity and detoxification mechanisms: A review

Chemosphere, Journal Year: 2023, Volume and Issue: 328, P. 138574 - 138574

Published: April 3, 2023

Language: Английский

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Phytoremediation of toxic heavy metals by Brassica plants: A biochemical and physiological approach

Environmental Advances, Journal Year: 2022, Volume and Issue: 8, P. 100204 - 100204

Published: Feb. 25, 2022

Contamination of soils and water bodies by toxic heavy metals (HMs) such as cadmium (Cd), chromium (Cr), mercury (Hg), arsenic (As), lead (Pb), zinc (Zn), is a major environmental concern. Phytoremediation botanical genus Brassica emerges an important technique, in which plants are used to decontaminate these areas. spp. reported potential phytoremediators hyperaccumulators our aim was elucidate the physiological biochemical use different species belonging bioremediate tolerate harmful effects contaminants on their metabolism. Since display efficient phytoremediation processes, phytovolatilization, phytostabilization, phytoextraction. These also have processes that aid absorption, translocation, accumulation HMs into low-activity cell organelles, addition enzymatic non-enzymatic defense mechanism attenuates oxidative damage induced overproduction reactive oxygen (ROS). In mechanisms, review effort gather scattered information other assistive techniques, chelating acidifying agents, selection tolerant cultivars, genetic engineering. Although techniques for management disposal biomass obtained after process reported, this issue still lacks studies present consensus regarding safer, more efficient, economically viable. is, promising however, need further aimed at agronomic assist high plant production, tolerance and, structuring hyperaccumulation network contaminants, so applicability feasibility can be larger areas (cropping areas).

Language: Английский

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