The effect of heavy metals on processes of lipid peroxidation in microsomal membranes from the hepatopancreas of the bivalve mollusc mizuhopecten yessoensis

1992 ◽  
Vol 103 (2) ◽  
pp. 419-422 ◽  
Author(s):  
V.P. Chelomin ◽  
N.N. Belcheva
Keyword(s):  
Heavy Metals ◽  
Lipid Peroxidation ◽  
Bivalve Mollusc ◽  
Mizuhopecten Yessoensis ◽  
Microsomal Membranes

Rat lung microsomal lipid peroxidation: effects of vitamin E and reduced glutathione

1986 ◽  
Vol 61 (2) ◽  
pp. 785-790 ◽  
Author(s):  
D. P. Franco ◽  
S. G. Jenkinson
Keyword(s):  
Lipid Peroxidation ◽  
Vitamin E ◽  
Liver Microsomes ◽  
Sulfhydryl Group ◽  
Rat Lung ◽  
Active Components ◽  
Microsomal Lipid Peroxidation ◽  
Microsomal Membranes ◽  
High Concentrations

Lung microsomal membranes that contain the redox active components associated with the mixed-function oxidase system can be peroxidized in vitro. To investigate the characteristics of rat lung microsomal lipid peroxidation, we performed experiments using a variety of peroxidation initiators and microsomes obtained from normal and vitamin E-deficient rats. We found that lung microsomes obtained from normal rats are peroxidized much less than liver microsomes obtained from the same animals. Only initiation systems using very high concentrations of ferrous iron produced any significant peroxidation of normal rat lung microsomes. Lung microsomes obtained from vitamin E-deficient rats were found to be much more susceptible to peroxidation. Glutathione (GSH) was effective in inhibiting peroxidation when lung microsomes from normal rats were peroxidized. GSH was not effective in decreasing peroxidation when microsomes from vitamin E-deficient rats were peroxidized in the same system. We conclude that both GSH and vitamin E protect lung microsomal membranes from peroxidation. Glutathione protection appears to be related to the presence of a sulfhydryl group.

The impacts of heavy metals on oxidative stress and growth of spring barley

2012 ◽  
Vol 7 (2) ◽  
pp. 299-306 ◽  
Author(s):  
Romualdas Juknys ◽  
Giedrė Vitkauskaitė ◽  
Milda Račaitė ◽  
Jonė Venclovienė
Keyword(s):  
Oxidative Stress ◽  
Heavy Metals ◽  
Lipid Peroxidation ◽  
Growth Inhibition ◽  
Spring Barley ◽  
Hordeum Vulgare L ◽  
Exponential Relationship ◽  
Pronounced Increase ◽  
Lead And Cadmium ◽  
Wide Range

AbstractOxidative stress is accepted to play a significant role in stress symptoms, caused by different stressors in a variety of organisms. In this study seedlings of spring barley (Hordeum vulgare L.) were exposed to a wide range of copper, zinc, chromium, nickel, lead and cadmium concentrations in order to determine the relationships between heavy metals-induced oxidative stress and plant growth inhibition. All investigated heavy metals induced an essential increase in lipid peroxidation and a reduction of dry biomass along with an increase in metal concentration in the nutrient solution. A very close and statistically significant exponential relationship between lipid peroxidation and growth inhibition was detected in this study. According to the results of analysis of variance (ANOVA), the intensity of nonspecific oxidative stress is identified as the main factor of barley growth inhibition, explaining 75% of total variance. Almost 10% of growth inhibition is attributed to the specific impact of heavy metals. The most pronounced increase of malondialdehyde content and growth inhibition was observed in Cu and Cd treatments, whereas the lowest changes in observed indicators were detected after exposure to Zn and Pb.

scholarly journals Attenuation of Mercury Phytotoxicity with a High Nutritional Level of Nitrate in Alfalfa Plants Grown Hydroponically

2021 ◽  
Author(s):  
Sandra Carrasco-Gil ◽  
Cristina Ortega-Villasante ◽  
Juan Sobrino-Plata ◽  
Ángel Barón-Sola ◽  
Rocío Millán ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Heavy Metals ◽  
Lipid Peroxidation ◽  
Nitrate Reductase ◽  
Culture System ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Hydroponic Culture ◽  
Physiological Alterations ◽  
Different Levels

Abstract Background and aims Mercury (Hg) is one of the most dangerous pollutant heavy metals to the environment, which causes several toxic effects in plants upon accumulation, such as induction of oxidative stress. Nitrogen (N) is one of the most limiting macronutrient for plants, being mostly assimilated as NO3─ which is reduced to NO2─ by the enzyme nitrate reductase (NR), prior its reduction to NH4+.Methods We studied the physiological alterations caused by Hg (0, 6 and 30 µM) in alfalfa plants grown at two different levels of NO3─: low, (2 mM; LN), and high (12 mM; HN) for one week using a semi-hydroponic culture system.Results Several parameters of oxidative stress such as lipid peroxidation, chlorophyll content, biothiol concentration and, ascorbate peroxidase (APX) and glutathione reductase (GR) activity showed that HN plants were less affected by Hg. Nitrate reductase activity and NO3─ concentration was altered under Hg stress, with lower impact in plants nourished with high NO3─. Conclusions Our results highlight the importance of the nitrogen nutritional status to improve tolerance to toxic metals like Hg.

scholarly journals Intensity of free radical processes in the leaves of arboreal plants under act of industrial dust borne extracts

2010 ◽  
pp. 83-87
Author(s):  
Olga Piskova ◽  
Vitalii Gryshko
Keyword(s):  
Heavy Metals ◽  
Lipid Peroxidation ◽  
Contamination Level ◽  
Base Line ◽  
Picea Pungens ◽  
Industrial Dust ◽  
Species Specific ◽  
Line Level ◽  
Radical Processes

The influence of industrial pollutants on the intensity of lipid peroxidation in the assimilatory organs of arboreal plant was investigated. The differential changes of the probed indexes are set depending on the species. Information is got can testify to participation of lipid peroxidation products in forming of reactions-answers of arboreal plants on influence of industrial dust borne extract with content of heavy metals. Determination of level and rates of accumulation of Zn, Ni, Pb and Cd, in the leaves of arboreal plants in the conditions of different contamination level allowed to take species to two groups. To the first (phytoextraction potential exceeds a base-line level in 10 times) belong Populus bolleana Lauche, P. italica (Du Roi) Moench, Picea pungens Engelm and Sorbus aucuparia L. To the second (exceeds a base-line level from 5 to 10 times) belong Acer negundo L., Aesculus hippocastanum L., Betula pendula Roth and Tilia cordata Mill. The most substantial increase of peroxidation secondary product content (more than in 2.5 times) is peculiar for B. pendula, A. hippocastanum and P. pungens Engelm., that well conforms to the rates of heavy metals translocation, it has however species-specific character.

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