Oxidative Stress and Antioxidant Defenses in Biology

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1. Introduction

The antioxidants and proline seemed to play role in mitigating the effect of heat stress. Understanding oxidative stress and antioxidant functions to enhance photosynthesis. Plant Physiol. American Society of Plant Biologists. Understanding the degradation of ascorbic acid and glutathione in relation to the levels of oxidative stress biomarkers in broccoli Brassica oleracea L. Bellstar during storage and mechanical processing. Food Chem.

Elsevier Ltd. The purpose of this research was to understand the degrdn. Bellstar during prolonged storage and subsequent mech. The initial content of total ascorbic acid and glutathione in broccoli florets averaged at 5. On each day of storage, broccoli florets were mech. When the mech. To obtain an in-depth understanding on the degrdn.

Oxidative Stress and Antioxidant Defense

The content of total ascorbic acid and glutathione in broccoli florets before and after mech. Meanwhile, the effect of oxidative stress on the content of ascorbic acid and glutathione was apparent during the 6 h of incubation after mech. This phenomenon was demonstrated by the level of oxidative stress biomarkers examd. Natural antioxidants and antioxidant capacity of Brassica vegetables: A review.

LWT--Food Sci. Dietary antioxidants, such as water-sol. As a result, they protect cells against oxidative damage, and may therefore prevent chronic diseases, such as cancer, cardiovascular disease, and diabetes. Brassica vegetables, which include different genus of cabbage, broccoli, cauliflower, Brussels sprouts, and kale, are consumed all over the world.

This review focuses on the content, compn. The effects of post-harvest storage, industrial processing, and different cooking methods on stability of bioactive components and antioxidant activity also are discussed. Phenolic compounds in Brassica vegetables. Molecules , 16 , — , DOI: Phenolic compds. Depending on their structure they can be classified into simple phenols, phenolic acids, hydroxycinnamic acid derivs. The Brassicaceae family includes a wide range of horticultural crops, some of them with economic significance and extensively used in the diet throughout the world.

The phenolic compn. Here, we review the significance of phenolic compds. The effect of seedling chilling on glutathione content, catalase and peroxidase activity in Brassica oleracea L. Acta Soc. Polish Botanical Society. The study was designed to det.

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A parallel objective of the expt. After 14 days of chilling a significant increase in the glutathione content was obsd. During vegetation in field conditions this effect was maintained in leaves up to the stage of formation of flower buds. At harvest the highest content of glutathione was demonstrated in broccoli heads, obtained from plants, which were previously chilled in the seedling phase for two weeks. Peroxidase activity in broccoli seedlings increased each year of the three-year study due to the duration of the cooling time, whereas in the case of catalase the changes were not so distinct.

At harvest time the activity of both enzymes in the leaves and flower buds fluctuated according to the particular year of study. Responses of canola Brassica napus L. Acta Physiol. Research progress on functions of glutathione reductase in chloroplasts of plants.

Zhiwu Shengli Xuebao , 52 , — Google Scholar There is no corresponding record for this reference. Evaluation of total soluble protein and antioxidant activities in two spring cultivars of canola Brassica napus L. Crop Sci. International Journal of Agriculture and Crop Sciences , 5 4 , , 9 pp. Science Explorer Publications. Canola Brassica napus L. The expansion of spring annual prodn. In Iran where high temp. However, spring cultivars are perceived to be low resistant to low-temps. In efficient physiol. The present work aims at assessing the physiol. They responded to cold treatment at a four-leaf stage in terms of the amt.

Variance analyses showed significant differences between sampling times, cultivars and temp. As a result of LT on protein content, there were significant differences between all sources of variation except between-temp. In both cultivars, antioxidant activity was changed differently, increasing significantly under low-temp. In cold-resistant the highest increase in protein content and SOD activity under low-temp.

It shows the importance of cellular antioxidant machinery for protection against low-temp.

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Cold-induced changes of antioxidant enzymes activity and lipid peroxidation in two canola Brassica napus L. Identification of antioxidant capacity -related QTLs in Brassica oleracea.

Public Library of Science. Brassica vegetables possess high levels of antioxidant metabolites assocd. Until now, no reports have been documented on the genetic basis of the antioxidant activity AA in Brassicas and the content of metabolites with AA like phenolics, anthocyanins and carotenoids. For this reason, this study aimed to: 1 study the relationship among different electron transfer ET methods for measuring AA, 2 study the relationship between these methods and phenolic, carotenoid and anthocyanin content and 3 find QTLs of AA measured with ET assays and for phenolic, carotenoid and anthocyanin contents in leaves and flower buds in a DH population of B.

Low correlation coeffs. A total of 19 QTLs were detected for all traits. AA of the mapping population is related to phenolic compds. Three genomic regions detd. After the syntenic anal. Phenylpropanoid and anthocyanin changes in low-temperature treated winter oilseed rape leaves. Editions Scientifiques et Medicales Elsevier. In mesophyll cells of winter oilseed rape leaves Brassica napus L.

In water-sol. In plants subjected to cold and then to freezing treatments, the levels of sol.

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Acclimation of plants in cold and the frost-thaw treatment resulted in the promotion of phenolic esterification. High rates of accumulation of ferulic and sinapic acids in cold were assocd.

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In leaves grown in cold for 3 wk, a two-fold accumulation of anthocyanins was obsd. The freezing treatment added nothing to the cold-dependent accumulation of anthocyanins. A possible role of sol. New insights into antioxidant activity of Brassica crops. Antioxidant activity of six Brassica crops broccoli, cabbage, cauliflower, kale, nabicol and tronchuda cabbage was measured at four plant stages with DPPH and FRAP assays.

Samples taken three months after sowing showed the highest antioxidant activity. Kale crop possessed the highest antioxidant activity at this plant stage and also at the adult plant stage, while cauliflower showed the highest antioxidant activity in sprouts and in leaves taken two months after sowing. Brassica byproducts could be used as sources of products with high content of antioxidants. Phenolic content and compn.

Differences in antioxidant activity of Brassica crops were related to differences in total phenolic content but also to differences in phenolic compn. Single and interactive effects of temperature and light quality on four canola cultivars. High temperature effects on photosynthesis, PSII functionality and antioxidant activity of two Festuca arundinacea cultivars with different heat susceptibility. High temp. In this study, we evaluated the photosynthesis, PSII functionality, and antioxidant activity of two tall fescue cultivars, Jaguar 3 brand heat-tolerant and TF 66 heat-sensitive in response to high temp.

Heat stress led to redns. Moreover, high temp. All the above effects induced by high temp. Our results contain some insights which may prove useful in the selection and breeding of heat-tolerant tall fescue turfgrass cultivars. Production and scavenging of reactive oxygen species in chloroplasts and their functions.

Prompt scavenging of the ROS produced in thylakoids prior to its diffusion from the generation site is indispensable to protect the target mols. The prodn. The photoprodn. These physiol. Heat-induced impairments and recovery of photosynthetic machinery in wheat seedlings. Role of light and prooxidant-antioxidant balance. Plants , 15 , — , DOI: Kreslavski, Vladimir D. Springer India Private Ltd. Drought stress is one of the most important environmental factors that affect plant growth and limit biomass production.

Most studies focus on drought stress development but the reversibility of the effects receives less attention. Therefore, the present work aims to explore the biological nitrogen fixation BNF of the symbiotic association between peanut Arachis hypogaea L. Peanuts exposed to drought stress had impaired BNF, as indicated by lower nitrogenase activity, and decreased leghaemoglobin content; the latter was reversed to control values upon rehydration. In addition, marker transcripts responsive to drought, abscisic acid and H 2 O 2 were upregulated.

Vinod K. Shailendra P. Rajeshwar P. Tools Request permission Export citation Add to favorites Track citation.

Share Give access Share full text access. Share full text access. Please review our Terms and Conditions of Use and check box below to share full-text version of article. Summary Reactive oxygen species ROS are generated during normal oxidative processes in all aerobic organisms. Related Information. Close Figure Viewer. Browse All Figures Return to Figure.

Oxidative Stress and Antioxidant Defenses in Biology Oxidative Stress and Antioxidant Defenses in Biology
Oxidative Stress and Antioxidant Defenses in Biology Oxidative Stress and Antioxidant Defenses in Biology
Oxidative Stress and Antioxidant Defenses in Biology Oxidative Stress and Antioxidant Defenses in Biology
Oxidative Stress and Antioxidant Defenses in Biology Oxidative Stress and Antioxidant Defenses in Biology
Oxidative Stress and Antioxidant Defenses in Biology Oxidative Stress and Antioxidant Defenses in Biology

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