Oxidative stress family ascorbate and h2o2 ascorbate peroxidases. Medical search. Frequent questions

Abstract Rapid generation of superoxide and accumulation of H2O2 is a characteristic early feature of the hypersensitive response following perception of pathogen avirulence signals. (rehabsociety.org.hk)
In cells , antioxidants such as glutathione , mycothiol or bacillithiol , and enzyme systems like superoxide dismutase , can prevent damage from oxidative stress . (wikipedia.org)
These results, together with previous data, suggest that the network of transcriptional control explains how CATs and other scavenger enzymes such as peroxidase and superoxide dismutase may be coordinately regulated during development, but differentially expressed in response to different stresses for controlling ROS homeostasis. (jipb.net)
Biochemistry bioassays confirmed the involvement of monooxygenase enzyme, carboxylesterase, superoxide dismutase and peroxidase in multi-insecticide resistance mechanism. (preprints.org)
2011 ). On the other side, plants have developed some enzymatic systems including superoxide dismutases (SOD), catalases (CAT), ascorbate peroxidases (APX), peroxiredoxins and non-enzymatic mechanisms to protect against oxidative damage caused by these ROS (Agrawal et al. (springeropen.com)
In the human cell, antioxidant molecules include both nonenzymatic compounds such as glutathione (GSH), thioredoxin (Trx), ascorbate, α -tocopherol, β -carotene, and coenzyme Q10 and enzymes such as catalase, glutathione peroxidase, and superoxide dismutase (SOD) [ 8 ]. (hindawi.com)

The glutathione peroxidase gene has positive function to damage induced by ROS. (springeropen.com)
To understand the mechanism of tolerance to deferent stresses in tea plant, a new glutathione peroxidase gene of tea plant was cloned and its expression pattern was analyzed under abiotic and biotic stresses. (springeropen.com)
A novel cDNA encoding glutathione peroxidase of tea plant (Camellia sinensis) was isolated by rapid amplification of cDNA ends (RACE) method and designated as CsGPX2 (GenBank Accession No. JQ247186). (springeropen.com)
The deduced amino acid sequence showed high homology with glutathione peroxidases of angiosperms and contained the characteristic conserved motifs of ILAFPCNQF and FTVKD, the highest level of similarity was 85% to a glutathione peroxidase from Ricinus communis (Accession NO. XP_002509790.1). (springeropen.com)

and bacterial catalase- peroxidases, exhibiting both peroxidase and catalase activities. (wikipedia.org)
It is thought that catalase-peroxidase provides protection to cells under oxidative stress. (wikipedia.org)
In Arabidopsis, catalase (CAT) genes encode a small family of proteins including CAT1, CAT2 and CAT3, which catalyze the decomposition of hydrogen peroxide (H2O2) and play an important role in controlling homeostasis of reactive oxygen species (ROS). (jipb.net)

Haem peroxidases (or heme peroxidases) are haem-containing enzymes that use hydrogen peroxide as the electron acceptor to catalyse a number of oxidative reactions. (wikipedia.org)
Germination of selected vegetable seeds including corn (Zea mays L.), squash (Cucurbita pepo L.), and tomato (Solanum lycopersicum L.) was studied in water with different concentrations of hydrogen peroxide (H2O2) solution ranging from 0, 0. (researchgate.net)
The use of hydrogen peroxide (H2O2) is recently recommended for use in drip irrigation particularly for cleaning of drip emitters. (researchgate.net)

In water solutions, this substance is present as a monovalent anion, ascorbate- (Asc-), which easily donates electrons to oxidized molecules and scavenges reactive oxygen species (ROS). (deepdyve.com)
Introduction Attempted infection of plants by a nonpathogen or an avir- ulent strain of a pathogen elicits rapid collapse of the chal- The oxidative burst, the generation of reactive oxygen species (ROS) in response to microbial pathogen attack, is a ubiquitous early part of the resistance mechanisms of plant cells. (rehabsociety.org.hk)
[9] Research into how vitamin E prevents the process of lipid peroxidation led to the identification of antioxidants as reducing agents that prevent oxidative reactions, often by scavenging reactive oxygen species before they can damage cells. (wikipedia.org)
The heavy metal stresses lead to reactive oxygen species (ROS) production, and high concentration of ROS is harmful to plants. (springeropen.com)

In biological systems 'oxidative stress' results from the presence of elevated levels of CRISPR/Cas-mediated crop trait improvement mainly focuses on yield, quality, and biotic and abiotic resistance. (rehabsociety.org.hk)
The oxidative burst or the rapid production of ROS with a subsequent cascade of plant responses to biotic and abiotic stress (Hippeli et al. (rehabsociety.org.hk)
Therefore, integrated approaches including Si supplementations will help to improve plant resilience under biotic and abiotic stresses. (researchsquare.com)
Horticultural crop production is frequently subjected to the naturally occurring different biotic and abiotic stresses that can substantially reduce the absorption and translation of essential elements and ultimately decrease the crop yield. (researchsquare.com)
Here we described the role of Si and its transporters in mitigating abiotic stress condition in horticultural plants. (researchsquare.com)
Previous soil and plant researchers suggests that use of beneficial soil microorganisms and silicon (Si) in agriculture is a sustainable strategy for alleviation of various biotic and abiotic stresses in plants (Rizwan et al. (researchsquare.com)
The CONSTANS-like 4 transcription factor, AtCOL4, positively regulates abiotic stress tolerance through an abscisic acid-dependent manner in Arabidopsis [J]. J Integr Plant Biol. (jipb.net)
The CsGPX2 gene showed strong responses to most abiotic stresses including salinity, heavy metal toxicity, drought, heat, plant hormones, but could not be induced by biotic treatment. (springeropen.com)
The result suggested that CsGPX2 had potential function in protecting tea plant from peroxidative damage induced by some abiotic stresses. (springeropen.com)
Under biotic or abiotic stress, ROS may dramatically accumulate in plants and generate oxidative damage (Faltin et al. (springeropen.com)

an oxidative burst triggered by the treatment of Arabidopsis plants with a cell wall elicitor prepared from the fungus Fusarium oxysporum could be abolished by knocking down the transcript levels of PRX33 and PRX34 through the transgenic expression of a French bean class III peroxidase cDNA (FBP1) in an antisense orientation (Daudi et al. (rehabsociety.org.hk)
Collectively, our results suggest that the type-A ARRs play an important role in heat stress response by affecting the redox homeostasis in Arabidopsis. (frontiersin.org)
Here, we analyze the expression profiles and activities of three catalases under different treatments including drought, cold, oxidative stresses, abscisic acid and salicylic acid in Arabidopsis. (jipb.net)

Khan TA, Mazid M, Mohammad F (2012) Potential of Ascorbic acid against oxidative burst in plants under biotic stress: a review. (rehabsociety.org.hk)

Severe water stress stops photosynthesis, disrupts metabolism, and kills plants. (stationzilla.com)
Thus, NADKc represents the missing link between Ca2+ signaling, metabolism, and the oxidative burst. (rehabsociety.org.hk)

Imbalance between oxidants and antioxidants in favor of oxidants leads to oxidative stress. (hindawi.com)

The water-deficit stress, also known as the drought stress, is the more typical type of water stress. (stationzilla.com)
Drought or root impairment causes water stress, which affects many invisible processes. (stationzilla.com)
Societal Impact Statement: Given the rapidly increasing drought and temperature stresses associated with climate change, innovative approaches for food security are imperative. (weizmann.ac.il)
In addition, CAT2 is activated by cold and drought stresses and CAT3 is mainly enhanced by abscisic acid and oxidative treatments as well as at the senescence stage. (jipb.net)

EPR spectroscopy measurements demonstrate that salinity (NaCl) triggers the accumulation of root apoplastic ascorbyl radicals in an A9C-dependent manner, confirming that l-ascorbate leaks through anion channels under depolarization. (deepdyve.com)

This mechanism may underlie ascorbate release, signalling phenomena, apoplastic redox reactions, iron acquisition, and control the ionic and electrical equilibrium (together with K+ efflux via GORK channels). (deepdyve.com)

Mn deficiency induced the oxidative stress for increase the H 2 O 2 and MDA content in leaves of plants and reduce the activity of antioxidant enzymes and total phenols causing damage to quantum efficiency of photosystem II and pigment content. (biomedcentral.com)

The complex nature of growth regulation under stress has been highlighted in studies of plant responses to soil water deficit at developmental, physiological, and molecular levels. (stationzilla.com)
A better understanding of the morphoanatomical and physiological basis of water stress resistance in plants could be used to select or create new crop varieties with better underwater productivity. (stationzilla.com)
2016) also suggested that H2O2 molecules play dual roles in plant physiological and developmental processes. (researchgate.net)
The mutants of multiple type-A ARR genes exhibit improved basal and acquired thermotolerance and, altered response to oxidative stress in our physiological analyses. (frontiersin.org)

Under oxidative-stressed conditions, cysteine residues of Keap1 are oxidized, forming a disulfide bridge. (hindawi.com)

Antioxidants are molecules that reduce ROS and keep the oxidative damage at a minimum. (hindawi.com)

Fe3+ + H2O + oxidized substrate In this mechanism, the enzyme reacts with one equivalent of H2O2 to give [Fe4+=O]R' (compound I). This is a two-electron oxidation/reduction reaction in which H2O2 is reduced to water, and the enzyme is oxidized. (wikipedia.org)

Various environmental stresses lead to excessive production of ROS causing progressive oxidative damage and ultimately cell death. (rehabsociety.org.hk)
It puts in place a sequence of events that ultimately protect the cell from oxidative injury. (hindawi.com)

Exogenous ascorbate also induces a moderate increase in programmed cell death symptoms in intact roots, but it does not activate Ca2+ influx currents in patch-clamped root protoplasts. (deepdyve.com)

Water stress reduces leaf water potential and stomatal opening, reducing photosynthesis-related genes and CO2 availability. (stationzilla.com)
Moreover, this study has elucidated that SA‐induced stomatal closure involves extracellular oxidative burst (Figs 2 & 3) and that the extracellular oxidative burst is mediated with SHAM‐sensitive peroxidases but not NAD(P)H oxidases (Figs 1d & 2). (rehabsociety.org.hk)

One oxidizing equivalent resides on iron, giving the oxyferryl intermediate, and in many peroxidases the porphyrin (R) is oxidized to the porphyrin pi-cation radical (R'). Compound I then oxidizes an organic substrate to give a substrate radical and Compound II, which can then oxidize a second substrate molecule. (wikipedia.org)

Unfavorably high temperature causes heat stress in all organisms and leads to disintegration of membrane lipids, protein misfolding and denaturation, oxidative burst, and increased membrane fluidity. (frontiersin.org)
As shown in Figure 1 , in the absence of oxidative stress, Kelch-like ECH-associated protein 1 (Keap1) keeps Nrf2 sequestered in the cytosol, where it mediates proteasomal degradation of Nrf2 [ 25 - 27 ]. (hindawi.com)

[7] [8] The possible mechanisms of action of antioxidants were first explored when it was recognized that a substance with anti-oxidative activity is likely to be one that is itself readily oxidized. (wikipedia.org)
The metabolomics analyses further reveal that the mutants accumulate higher amounts of α-and γ-tocopherols, which are important antioxidants for protection against oxidative damage. (frontiersin.org)

Water stress has many similar features with salinity stress, but it is considered as more destructive to agricultural as compared to salt stress (Bodner et al. (researchsquare.com)

Besides the long-standing role of cytokinins (CKs) as growth regulators, their current positioning at the interface of development and stress responses is coming into recognition. (frontiersin.org)
Abscisic acid (ABA) is a representative signaling hormone involved in regulating plant stress responses. (mdpi.com)

It has been proved that ROS has two entirely different roles in plants, signal function and oxidative damage. (springeropen.com)

18 The oxidative burst mounted during early plant infection disrupts the cellular redox homeostasis 19 of fungal phytopathogens. (rehabsociety.org.hk)

The enhanced effects on germination with H2O2 have a) been reported for seed with pathogenic infestations (Szopniska, 2014) i.e. a biocidal effect, and b) mediated through the oxidation of germination inhibitors present in the seed coat or/and in the pericarp, i.e. a seed treatment effect. (researchgate.net)
Inflammation often exacerbates the oxidative stress, creating a self-perpetuating, vicious cycle of oxidation and inflammation [ 20 , 21 ]. (hindawi.com)

Proposed molecular mechanisms of oxidative stress-induced Nrf2 activation. (hindawi.com)

Nitric oxide alleviates aluminum-induced oxidative damage through regulating the ascorbate-glutathione cycle in roots of wheat [J]. J Integr Plant Biol. (jipb.net)

Various stresses instigated by complex environmental conditions have affected the production and cultivation of crops (Meena et al. (researchsquare.com)
An early study by Narimanov (2000) reported enhanced germination, emergence and development of seedlings using a short seed soaking treatment with H2O2 in a wide variety of crops including corn (Zea mays L.), beans (Phaseolus sp. (researchgate.net)

Thus, the objective of this study was to evaluate whether Si reduces the oxidative stress of the energy cane grown in low Mn in nutrient solution, to mitigate the effects of Mn deficiency, improving enzymatic and non-enzymatic defense, uptake of Mn the plant growth. (biomedcentral.com)

Silicon (Si) is a multiple stress attenuator element in plants, however more research is needed to elucidate the actions in the plants defense system with low nutrition of manganese (Mn) for a prolonged period, and the attenuation mechanisms involved in the effects of Mn deficiency on energy cane with high fiber content. (biomedcentral.com)

A substantial number of proteins that are involved in the heat-acclimatization process such as the proteins related to cellular redox status and heat shock, are already altered in the type-A arr mutants without a prior exposure to stress conditions. (frontiersin.org)

In addition, an excess of oxidative free radicals also increases the expression of proinflammatory genes and activates the inflammation process [ 18 , 19 ]. (hindawi.com)

When water levels are low due to water stress, photosynthesis can slow or stop, causing internal food supplies to diminish or disappear. (stationzilla.com)

CAT2 and CAT3 are major H2O2 scavengers that contribute to ROS homeostasis in light or darkness, respectively. (jipb.net)

In future, environmental stresses may increase with climate change. (researchsquare.com)

H2O2 increases germination rates by breaking down the seed coat, thus allowing the seed to take in oxygen more quickly. (researchgate.net)

Water stress causes wilting because plant cells lose their turgor pressure, which keeps them erect. (stationzilla.com)
Determinants of timing and amplitude in the plant general stress response [J]. J Integr Plant Biol. (jipb.net)

Haem peroxidases include two superfamilies: one found in bacteria, fungi, and plants, and the second found in animals. (wikipedia.org)
Water Stress - How Does Plants Respond To Water Stress? (stationzilla.com)
What Are The Impact Of Water Stress On Plants? (stationzilla.com)

Oxidative stress can denature lipids and proteins [ 10 , 12 - 14 ], as well as induce DNA and RNA fragmentation [ 15 - 17 ], leading to cell dysfunction, injury, and death. (hindawi.com)

Our results reveal that CAT1 is an important player in the removal of H2O2 generated under various environmental stresses. (jipb.net)

This review focuses on the effects of oxidative stress and the role of a particular antioxidant system-the Keap1-Nrf2-ARE pathway-on ocular diseases, specifically age-related macular degeneration, cataracts, diabetic retinopathy, and glaucoma. (hindawi.com)

Hence now feeding the worlds growing population with shrinking cultivable land area along with environmental stresses has given vital importance in research (Etesami and Bettie 2017). (researchsquare.com)

Water stress can result from two situations: either an excessive amount of water is present or there is a water shortage. (stationzilla.com)

The perception and signaling of heat stress is initiated by high temperature-induced changes in the plasma membrane. (frontiersin.org)

A general trend is that the CK levels rise transiently in response to stress stimuli and decline over time if the stress condition is mild or moderate. (frontiersin.org)

Nuclear factor erythroid-2-related factor 2 (Nrf2) is a transcription factor that is upregulated in times of oxidative stress. (hindawi.com)

Cell division is less inhibited by water stress than cell growth. (stationzilla.com)

Si attenuated the effects of Mn deficiency even for a longer period of stress by reducing H 2 O 2 (18%) and MDA (32%) content, and increased the Mn uptake efficiency (53%), SOD activity (23%), GPOX (76%), phenol contents, thus improving growth. (biomedcentral.com)

showed that the effect of H2O2 on corn seed germination was significantly greater than for seed treated with aerated water but no H2O2. (researchgate.net)

In case of increased stress, the CK level remains high or does not return to the baseline level ( Zwack and Rashotte, 2015 ). (frontiersin.org)

Anatomy8

Organisms12

Diseases2

Chemicals and Drugs38

Phenomena and Processes13

Technology, Industry, Agriculture4

Information Science3

Superoxide6

Glutathione peroxidase4

Catalase3

Hydrogen peroxide3

Reactive oxygen4

Abiotic10

Arabidopsis3

Biotic1

Metabolism2

Imbalance1

Drought4

Accumulation1

Reactions1

Enzymes1

Physiological4

Cysteine1

Molecules1

Enzyme1

Ultimately2

Induces1

Stomatal2

Molecule1

Protein2

Antioxidants2

Salinity1

Responses2

Roles1

Burst1

Oxidation2

Molecular1

Damage1

Crops2

Enzymatic1

Mechanisms1

Cellular1

Genes1

Photosynthesis1

Homeostasis1

Climate change1

Increases1

Plant2

Plants3

Proteins1

Reveal1

Antioxidant1

Environmental1

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Temperature1

Moderate1

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Cell1

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Water1

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