scholarly journals Calcium Mitigates Arsenic Toxicity in Rice Seedlings by Reducing Arsenic Uptake and Modulating the Antioxidant Defense and Glyoxalase Systems and Stress Markers

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Anisur Rahman ◽  
Mohammad Golam Mostofa ◽  
Md. Mahabub Alam ◽  
Kamrun Nahar ◽  
Mirza Hasanuzzaman ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Defense ◽  
Calcium Supplementation ◽  
Monodehydroascorbate Reductase ◽  
Rice Seedlings ◽  
Arsenic Uptake ◽  
Glyoxalase Ii ◽  
Stress Markers ◽  
As Stress ◽  
Hydroponically Grown

The effect of exogenous calcium (Ca) on hydroponically grown rice seedlings was studied under arsenic (As) stress by investigating the antioxidant and glyoxalase systems. Fourteen-day-old rice (Oryza sativaL. cv. BRRI dhan29) seedlings were exposed to 0.5 and 1 mM Na2HAsO4alone and in combination with 10 mM CaCl2(Ca) for 5 days. Both levels of As caused growth inhibition, chlorosis, reduced leaf RWC, and increased As accumulation in the rice seedlings. Both doses of As in growth medium induced oxidative stress through overproduction of reactive oxygen species (ROS) by disrupting the antioxidant defense and glyoxalase systems. Exogenous application of Ca along with both levels of As significantly decreased As accumulation and restored plant growth and water loss. Calcium supplementation in the As-exposed rice seedlings reduced ROS production, increased ascorbate (AsA) content, and increased the activities of monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), catalase (CAT), glutathione peroxidase (GPX), superoxide dismutase (SOD), and the glyoxalase I (Gly I) and glyoxalase II (Gly II) enzymes compared with seedlings exposed to As only. These results suggest that Ca supplementation improves rice seedlings tolerance to As-induced oxidative stress by reducing As uptake, enhancing their antioxidant defense and glyoxalase systems, and also improving growth and physiological condition.

scholarly journals Supplemental Selenium and Boron Mitigate Salt-Induced Oxidative Damages in Glycine max L.

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2224
Author(s):  
Mira Rahman ◽  
Khussboo Rahman ◽  
Khadeja Sultana Sathi ◽  
Md. Mahabub Alam ◽  
Kamrun Nahar ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Salt Stress ◽  
Antioxidant Defense ◽  
Foliar Application ◽  
Growth Parameters ◽  
Monodehydroascorbate Reductase ◽  
Ros Scavenging ◽  
H2o2 Content ◽  
Mda Content ◽  
Different Levels

The present investigation was executed with an aim to evaluate the role of exogenous selenium (Se) and boron (B) in mitigating different levels of salt stress by enhancing the reactive oxygen species (ROS) scavenging, antioxidant defense and glyoxalase systems in soybean. Plants were treated with 0, 150, 300 and 450 mM NaCl at 20 days after sowing (DAS). Foliar application of Se (50 µM Na2SeO4) and B (1 mM H3BO3) was accomplished individually and in combined (Se+B) at three-day intervals, at 16, 20, 24 and 28 DAS under non-saline and saline conditions. Salt stress adversely affected the growth parameters. In salt-treated plants, proline content and oxidative stress indicators such as malondialdehyde (MDA) content and hydrogen peroxide (H2O2) content were increased with the increment of salt concentration but the relative water content decreased. Due to salt stress catalase (CAT), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), glyoxalase I (Gly I) and glyoxalase II (Gly II) activity decreased. However, the activity of ascorbate peroxidase (APX), glutathione reductase (GR), glutathione peroxidase (GPX), glutathione S-transferase (GST) and peroxidase (POD) increased under salt stress. On the contrary, supplementation of Se, B and Se+B enhanced the activities of APX, MDHAR, DHAR, GR, CAT, GPX, GST, POD, Gly I and Gly II which consequently diminished the H2O2 content and MDA content under salt stress, and also improved the growth parameters. The results reflected that exogenous Se, B and Se+B enhanced the enzymatic activity of the antioxidant defense system as well as the glyoxalase systems under different levels of salt stress, ultimately alleviated the salt-induced oxidative stress, among them Se+B was more effective than a single treatment.

scholarly journals Effect of Daily Chewing Soft Buds and Leaves of Catha edulis (Khat) on the Antioxidant Defense System and Oxidative Stress Markers in Blood

2014 ◽  
Vol 40 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Khalid Mohammed Naji ◽  
Maher Ali Al-Maqtari ◽  
Adnan Ali Al-Asbahi ◽  
Qais Yusuf M. Abdullah ◽  
R. Nagesh Babu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Defense ◽  
Antioxidant Defense System ◽  
Oxidative Stress Markers ◽  
Defense System ◽  
Catha Edulis ◽  
Stress Markers ◽  
And Oxidative Stress

scholarly journals Oxidative Damage and Antioxidant Defense in Sesamum indicum after Different Waterlogging Durations

Plants ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 196 ◽  
Author(s):  
Anee ◽  
Nahar ◽  
Rahman ◽  
Mahmud ◽  
Bhuiyan ◽  
...  
Keyword(s):  
Antioxidant Defense ◽  
Redox Balance ◽  
Sesamum Indicum ◽  
Monodehydroascorbate Reductase ◽  
Chl A ◽  
Glyoxalase Ii ◽  
Increasing Trend ◽  
Relative Water ◽  
Leaf Relative Water Content ◽  
Waterlogging Treatment

The present study was designed to investigate the duration-dependent changes in the biochemical attributes of sesame in response to waterlogging stress. Sesame plants (Sesamum indicum L. cv. BARI Til-4) were subjected to waterlogging for 2, 4, 6, and 8 days during the vegetative stage and data were measured following waterlogging treatment. The present study proves that waterlogging causes severe damage to different attributes of the sesame plant. The plants showed an increasing trend in lipid peroxidation as well as hydrogen peroxide (H2O2) and methylglyoxal contents that corresponded to increased stress duration. A prolonged period of waterlogging decreased leaf relative water content and proline content. Photosynthetic pigments, like chlorophyll (chl) a, b, and chl (a+b) and carotenoid contents, also decreased over time in stressed plants. Glutathione (GSH) and oxidized glutathione (GSSG) contents increased under waterlogging, while the GSH/GSSG ratio and ascorbate content decreased, indicating the disruption of redox balance in the cell. Ascorbate peroxidase, monodehydroascorbate reductase, and glutathione peroxidase activity increased under waterlogging, while dehydroascorbate reductase, glutathione reductase, and catalase activity mostly decreased. Waterlogging modulated the glyoxalase system mostly by enhancing glyoxalase II activity, with a slight increase in glyoxalase I activity. The present study also demonstrates the induction of oxidative stress via waterlogging in sesame plants and that stress levels increase with increased waterlogging duration.

Impairment of antioxidant defense mechanisms in elderly women without increase in oxidative stress markers: “A weak equilibrium”

Lipids ◽  
1999 ◽  
Vol 34 (S1) ◽  
pp. S289-S289 ◽  
Author(s):  
J. P. Cristol ◽  
M. Abderrazick ◽  
F. Favier ◽  
F. Michel ◽  
J. Castel ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Defense Mechanisms ◽  
Antioxidant Defense ◽  
Elderly Women ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
Weak Equilibrium

scholarly journals The Relevance of Oxidative Stress Status in One Week and One Month Alcohol Abstinent Patients

2014 ◽  
Vol 33 (3) ◽  
pp. 284-290 ◽  
Author(s):  
Ovidiu Alexinschi ◽  
Roxana Chirita ◽  
Alin Ciobica ◽  
Padurariu Manuela ◽  
Romeo Dobrin ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Alcohol Withdrawal ◽  
Antioxidant Defense ◽  
Defense Mechanism ◽  
Specific Activity ◽  
Oxidative Stress Marker ◽  
Control Group ◽  
Stress Markers ◽  
Oxidative Stress Status ◽  
Markers Of Oxidative Stress

Abstract Background: Although it is generally accepted that there is an increased oxidative stress status in alcoholics, the separate relevance of oxidative stress following alcohol withdrawal is still not understood to this date. There are reports stating that the increased oxidative stress status in alcoholics may persist independently of the constant presence of alcohol intake, while on the other side, it was demonstrated that the antioxidant defense mechanism could significantly increase after alcohol withdrawal. Methods: In the present work, we were interested in studying the relevance of oxidative stress status in the alcohol withdrawal processes, by determining some oxidative stress markers (two antioxidant enzymes: superoxide dismutase - SOD and glutathione peroxidase - GPX and a lipid peroxidation maker - MDA) after one week and one month of abstinence, as compared to the baseline and a control group of subjects. Results: Our data confirmed the increased oxidative stress status in alcoholic patients and, more importantly, we de m - onstrated here a significant decrease of the oxidative stress status one week and one month following the withdrawal, as showed by a significant increase in the specific activity of SOD (p<0.003), as well as by a decrease in MDA levels (p<0.019). Still, in the case of all three markers of oxidative stress status which we determined, the levels after one week or one month of abstinence were significantly altered when compared to controls. Conclusions: This suggests that severe and prolonged deficiency in the oxidative stress marker levels needs longer than one month of abstinence to normalize.

scholarly journals Effect of Different Running Exercise Modalities on Post-Exercise Oxidative Stress Markers in Trained Athletes

2020 ◽  
Vol 17 (10) ◽  
pp. 3729
Author(s):  
Wajdi Souissi ◽  
Mohamed Amine Bouzid ◽  
Mohamed Amine Farjallah ◽  
Lobna Ben Mahmoud ◽  
Mariem Boudaya ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Defense ◽  
Intermittent Exercise ◽  
Post Exercise ◽  
Continuous Exercise ◽  
Running Exercise ◽  
Passive Recovery ◽  
Stress Markers ◽  
Lipid Damages ◽  
Continuous Running

The aim of this study was to examine the effect of running exercise modality on oxidative stress. Thirteen endurance athletes (age: 21.46 ± 0.66 years) performed three different running exercise modalities (Continuous running exercise (CR): continuous running exercise at 75% of VO2max for 25 min; intermittent running exercise #1 (15/15): intermittent running protocol, 15 s running at 75% of VO2max, 15 s passive recovery, performed for 50 min; intermittent running exercise #2 (30/30): intermittent running protocol, 30 s running at 75% of VO2max, 30 s passive recovery, performed for 50 min) in a randomized order. Blood samples were drawn at rest and immediately after each running exercise and assessed for malondialdehyde (MDA), advanced oxidation protein products (AOPP), superoxide dismutase(SOD), and glutathione peroxidase (GPX) activities. MDA increased by 55% following 30/30 exercise (p < 0.01), while it remained unchanged with CR and15/15 exercise. SOD increased after CR (+13.9%, p < 0.05), and also remained unchanged after 15/15 (p > 0.05) and decreased after 30/30 (−19.7% p < 0.05). GPX and AOPP did not change after exercise in all experimental sessions (p > 0.05). In conclusion, 30/30 intermittent running induced higher lipid damages than the 15/15 and CR exercise. 15/15 intermittent exercise promoted a better balance between free radicals production and antioxidant defense compared to continuous exercise and intermittent 30/30 exercise.

scholarly journals Influence of Chelating Ligands on Arsenic Uptake by Hydroponically Grown Rice Seedlings (Oryza sativaL.): A Preliminary Study

2008 ◽  
Vol 36 (5-6) ◽  
pp. 521-527 ◽  
Author(s):  
Mohammad Azizur Rahman ◽  
Hiroshi Hasegawa ◽  
Kazumasa Ueda ◽  
Teruya Maki ◽  
M. Mahfuzur Rahman
Keyword(s):  
Chelating Ligands ◽  
Rice Seedlings ◽  
Arsenic Uptake ◽  
Preliminary Study ◽  
Hydroponically Grown
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