Heavy metals in main drains at great Cairo and correlation with polyamines, glutathione, and lipid peroxidation in hyperaccumulating plants

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.

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Heavy metals, lipid peroxidation, and ciguatera toxicity in the liver of the caribbean barracuda (Sphyraena barracuda)

Biological Trace Element Research ◽

10.1007/bf02783850 ◽

1999 ◽

Vol 70 (1) ◽

pp. 69-79 ◽

Cited By ~ 38

Author(s):

J. Matta ◽

M. Milad ◽

R. Manger ◽

T. Tosteson

Keyword(s):

Heavy Metals ◽

Lipid Peroxidation ◽

Sphyraena Barracuda ◽

The Caribbean

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

10.21203/rs.3.rs-771412/v1 ◽

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.

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

Acta Agraria Debreceniensis ◽

10.34101/actaagrar/38/2764 ◽

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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