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Antioxidant defense

Tìm thấy 11+ kết quả cho từ khóa "Antioxidant defense"

Plant response to salinity: An analysis of ROS formation, signaling, and antioxidant defense

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The antioxidant defense system in plants comprises enzymatic and nonenzymatic components that are responsible for the scavenging of reactive oxygen species (ROS) (Mittler et al., 2004). In particular, comparative studies conducted with salt stress-tolerant relatives of crop plants demonstrated that there is a correlation between antioxidant capacity and salt stress tolerance (Bor et al., 2003. Seckin et al., 2010).

Isolation, selection of lactobacillus strains with probiotic and antioxidant activities

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From traditional fermented foods, we isolated, screened and selected Lactobacillus has probiotic and antioxidant, we obtained two strains which high probiotic and antioxidant capacity, identified as Lactobacillus plantarum and Lactobacillus brevis. These strains could provide microbial agents for further studies on the antioxidant capacity of probiotic bacteria and functional food applications.. "Oxidative stress and antioxidant defense,".

Synthesis and evaluation of antioxidant activities of novel 1,3,4-oxadiazole and imine containing 1H-benzimidazoles

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These findings indicate that some of the synthesized compounds possess beneficial effects on the human antioxidant defense system and have been suggested to act as antioxidants. Among all of the final compounds, compound 12 displayed the highest inhibition (76%) in the DPPH scavenging assay.

Presowing seed treatment with glycine betaine confers NaCl tolerance in quinoa by modulating some physiological processes and antioxidant machinery

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It was also observed the GB reduced the salinity induced lipid peroxidation through stabilizing antioxidant defense system (Hoque et al., 2007).. As the action of these enzymes plays a protective role against ROS, which is produced under various abiotic stresses (Ashraf et al., 2018)..

The first synthesis and antioxidant and anticholinergic activities of 1-(4,5-dihydroxybenzyl)pyrrolidin-2-one derivative bromophenols including natural products

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The presented novel bromophenols showed Ki values in the range of nM against AChE and nM against BChE.. 25 The imbalance between the antioxidant defense systems and ROS leads to oxidative correction in the intracellular molecules or cellular membrane.

Effect of maltose and trehalose on growth, yield and some biochemical components of wheat plant under water stress

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Exogenous salicylic acid ameliorates short-term drought stress in mustard (Brassica juncea L.) seedlings by up-regulating the antioxidant defense and glyoxalase system. Trehalose-induced drought stress tolerance: a comparative study among different Brassica species. Exogenous salicylic acid and trehalose ameliorate short term drought stress in wheat cultivars by up- regulating membrane characteristics and antioxidant defense system.

All aspects of the toxic effects of lipopolysaccharide on rat liver and the protective effect of vitamin E and sodium selenite

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VE and SS regulate toxicity by the antioxidant mechanism, which constitutes a significant portion of the nonenzymatic antioxidant defense system (Karabulut- Bulan et al., 2008). Our work detected that LPS induced oxidative stress in the liver. cells of rats via the formation of free radicals and changes in the cellular antioxidant defense system. These changes were determined through the FRAP and TEAC of the liver cells.

Acute and chronic effects of thifluzamide on Daphnia magna

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Organisms have evolved an antioxidant defense system to prevent oxidative damage caused by toxic substances and maintain body homeostasis (Wang et al., 2016). Antioxidant enzymes such as CAT, GPX, and GST and nonenzymatic scavengers are important components of the antioxidant defense system (Wang et al., 2016). Li et al. Therefore, in the present study, four selected genes associated with the detoxification/. antioxidant system were used to evaluate the acute toxicity of thifluzamide on D.

Enzymatic disturbances of the Egyptian beetle, Blaps polychresta (Forskål, 1775), as environmental indicators of heavy metal pollution of agricultural soils

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The antioxidant defense and oxidative stress were more evident in the insect tissues that. The excess ROS can produce oxidative stress damage and stimulate harmful effects on insect tissues (Ferreira et al., 2019), which are diminished in the different or- ganisms by non-enzymatic and enzymatic antioxidants (Aljahdali and Alhassan, 2020)..

Comparative transcriptome analysis indicates conversion of stamens into pistillike structures in male sterile wheat (Triticum aestivum L.) with Aegilops crassa cytoplasm

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The downregulation of antioxidant enzymes and key com- plexes represses electron transfer in the electron transport chain and the electrons then transfer directly to molecular oxygen to produce excessive amounts of reactive oxygen species (ROS). Upregulation of the activities of antioxidant enzymes disrupts the balance of the antioxidant defense system. The discrepancies in the gene expression levels were reasonable because of the different methods employed.

Transcriptome profiling of Malus sieversii under freezing stress after being coldacclimated

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According to the heat map of the antioxidant-related gene ex- pression levels of DEGs (Fig. Responses of the plant hormone signaling network to cold stress. (B) Venn diagram of the DETs at the different time points compared with the CK. The size and color of the dots represent the transcript numbers and the q-values, respectively. 4 Heat map of the relative expression levels of DEGs involved in sugar metabolism and the antioxidant defense system.

Seasonal variations effect on antioxidant compounds and their role in the adaptation of some halophytes at Wadi Gharandal, Southwest Sinai

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(Kumar et al., 2017). machrostachyum indicates that the two species are true halophytes as- sociated with lower lipid peroxidation and are not obligate to synthe- size more antioxidant (carotenoids) as defense mechanism.. Ascorbic acid can be considered as a cofactor for some hydroxylase enzymes and violaxanthin de-epoxidase beside its role as an antioxidant (Smirno ff , 1996).

The growth responses and antioxidant capabilities of melinjo (Gnetum gnemon L.) in different durations of drought stress

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The growth responses and antioxidant capabilities of melinjo (Gnetum gnemon L.) in different durations of drought stress. Antioxidant Drought stress Melinjo Radical scavenging. The antioxidant compounds benefit human health and plant to develop defense mechanisms under environmental stresses, such as drought stress. This study aims to evaluate the defense mechanism of melinjo under drought stress.

Host Perimeter Defense

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Host Perimeter Defense - SANS ©2001 22. Host Perimeter Defense - SANS ©2001 23. Out-of-the-box security. Host Perimeter Defense - SANS ©2001 24. Host Perimeter Defense - SANS ©2001 25. Host Perimeter Defense - SANS ©2001 26. Host Perimeter Defense - SANS ©2001 27. Host Perimeter Defense - SANS ©2001 28. By clicking on “No” the remote sensor is blocked from receiving the data from your system.. Host Perimeter Defense - SANS ©2001 29.

Antioxidant properties of water-soluble phthalocyanines containing quinoline 5-sulfonic acid groups

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Overall, all tested compounds showed good antioxidant properties and it may be suggested that they could be used as new positive controls for reducing power assays in the future works.. Thus, they play a very important role in the defense mechanisms of all living organisms [1]. Also, photodynamic therapy (PDT) is one of the applications of antioxidants.. The use of Pc compounds in these areas depends on their solubility in common organic solvents and water.

Effect of short-term heat stress on total sugars, proline and some antioxidant enzymes in moth bean (Vigna aconitifolia)

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Increased antioxidant activity under elevated temperature: a mechanism of heat stress tolerance in wheat genotypes

Thiamin-induced variations in oxidative defense processes in white clover (Trifolium repens L.) under water deficit stress

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Does exogenously applied trehalose alter oxidative defense system in the edible part of radish (Raphnus sativus L.) under water deficit conditions? Sci Hort

Comparison of antioxidant capacities and antioxidant components of commercial bitter melon (Momordica charantia L.) products

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The CUPRAC method [21], which is widely used in antioxidant capacity determinations, was used for the first time in this study for the antioxidant capacity measurements of the mentioned samples. This reagent is much more stable and easily accessible than the chromogenic radical reagents (e.g., ABTS, DPPH, etc.) The TAC values of antioxidants found with CUPRAC are perfectly additive, i.e. This method gives a reliable estimate of the actual antioxidant capacity of sample extracts.

Phenolic content and antioxidant activity of einkorn and emmer sprouts and wheatgrass obtained under different radiation wavelengths

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Antioxidant activity. Antioxidant activity was measured by DPPH and ferric reducing antioxidant power (FRAP) tests following the same procedure used by Falcinelli et al. All data were analyzed by two-way ANOVA and the effect of genotype (G), light (L), and their interaction (G × L) were tested.. Differences between any couple of treatments were tested by the least signi fi cant difference (LSD) of the interaction..

Schiff base of isoniazid and ketoprofen: synthesis, X-ray crystallographic, spectroscopic, antioxidant, and computational studies

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The DPPH radical scavenging (antioxidant) studies revealed that the Schiff base has a lower IC 50 value, signifying its high antioxidant activity. H-O hydrogen bonds between the monomers of the Schiff base. The enthalpy change ( ∆H ) data suggest that the dimer is energetically favorable in comparison to monomers, probably due to the hydrogen bonds.