Heavy Metal Induced Oxidative Damage in Terrestrial Plants

2004 ◽  
pp. 84-126 ◽  
Author(s):  
B. P. Shaw ◽  
S. K. Sahu ◽  
R. K. Mishra
Keyword(s):  
Heavy Metal ◽  
Oxidative Damage ◽  
Terrestrial Plants

scholarly journals Effect of Cadmium Toxicity on Growth, Oxidative Damage, Antioxidant Defense System and Cadmium Accumulation in Two Sorghum Cultivars

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1575
Author(s):  
Muhammad Jawad Hassan ◽  
Muhammad Ali Raza ◽  
Sana Ur Rehman ◽  
Muhammad Ansar ◽  
Harun Gitari ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Oxidative Damage ◽  
Antioxidant Defense ◽  
Cadmium Toxicity ◽  
Antioxidant Defense System ◽  
Agricultural Crop ◽  
Cd Stress ◽  
Defense System ◽  
Cd Uptake ◽  
Semi Arid

Heavy metal stress is a leading environmental issue reducing crop growth and productivity, particularly in arid and semi-arid agro-ecological zones. Cadmium (Cd), a non-redox heavy metal, can indirectly increase the production of reactive oxygen species (ROS), inducing cell death. A pot experiment was conducted to investigate the effects of different concentrations of Cd (0, 5, 25, 50, 100 µM) on physiological and biochemical parameters in two sorghum (Sorghum bicolor L.) cultivars: JS-2002 and Chakwal Sorghum. The results showed that various concentrations of Cd significantly increased the Cd uptake in both cultivars; however, the uptake was higher in JS-2002 compared to Chakwal Sorghum in leaf, stem and root. Regardless of the cultivars, there was a higher accumulation of the Cd in roots than in shoots. The Cd stress significantly reduced the growth and increased the electrolyte leakage (EL), hydrogen peroxide (H2O2) concentration and malondialdehyde (MDA) content in both cultivars, but the Chakwal Sorghum showed more pronounced oxidative damage than the JS-2002, as reflected by higher H2O2, MDA and EL. Moreover, Cd stress, particularly 50 µM and 100 µM, decreased the activity of different antioxidant enzymes, including superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT). However, the JS-2002 exhibited higher SOD, POD and CAT activities than the Chakwal Sorghum under different Cd-levels. These findings revealed that JS-2002 had a stronger Cd enrichment capacity and also exhibited a better tolerance to Cd stress due to its efficient antioxidant defense system than Chakwal Sorghum. The present study provides the available information about Cd enrichment and tolerance in S. bicolor, which is used as an important agricultural crop for livestock feed in arid and semi-arid regions.

scholarly journals NaCl protects against Cd and Cu-induced toxicity in the halophyte Atriplex halimus

2016 ◽  
Vol 14 (4) ◽  
pp. e0810 ◽  
Author(s):  
Insaf Bankaji ◽  
Noomene Sleimi ◽  
Aurelio Gómez-Cadenas ◽  
Rosa M. Pérez-Clemente
Keyword(s):  
Heavy Metal ◽  
Plant Growth ◽  
Oxidative Damage ◽  
Heavy Metal Stress ◽  
Antioxidant Response ◽  
Root Weight ◽  
Atriplex Halimus ◽  
Metallic Trace Elements ◽  
Irrigation Solution ◽  
Ion Contents

The objective of the present work was to evaluate the extent of Cd- and Cu-induced oxidative stress and the antioxidant response triggered in the halophyte species Atriplex halimus after metallic trace elements exposure. Plants were treated for one month with Cd2+ or Cu2+ (400 µM) in the absence or presence of 200 mM NaCl in the irrigation solution. The interaction between salinity and heavy metal stress was analyzed in relation to plant growth, tissue ion contents (Na+, K+ and Mg2+), oxidative damage and antioxidative metabolism. Data indicate that shoot and root weight significantly decreased as a consequence of Cd2+- or Cu2+-induced stress. Metallic stress leads to unbalanced nutrient uptake by reducing the translocation of K+ and Mg2+ from the root to the shoot. The levels of malondialdehyde increased in root tissue when Cd, and especially Cu, were added to the irrigation solution, indicating that oxidative damage occurred. Results showed that NaCl gave a partial protection against Cd and Cu induced toxicity, although these contaminants had distinct influence on plant physiology. It can be concluded that salinity drastically modified heavy metal absorption and improved plant growth. Salinity also decreased oxidative damage, but differently in plants exposed to Cd or Cu stress.

scholarly journals PROTECTIVE EFFECT OF CURCUMA LONGA ADMINISTRATION ON LUNG OF MICE EXPOSED TO CADMIUM

2018 ◽  
Vol 11 (10) ◽  
pp. 536
Author(s):  
Suman Sharma ◽  
Amrita Kumari
Keyword(s):  
Heavy Metal ◽  
Body Weight ◽  
Oral Dose ◽  
Oxidative Damage ◽  
Protective Effect ◽  
Curcuma Longa ◽  
Protective Action ◽  
Control Group ◽  
Toxic Heavy Metal ◽  
Group 2

Objective: Cadmium (Cd) is a toxic heavy metal which is introduced into the environment by various anthropogenic and natural activities. It can cause various health problems even at low concentration by inducing oxidative damage in tissues of organisms. Nowadays, the focus has been raised toward the use of herbal treatment against the heavy metal toxicity. Hence, the present study was aimed to investigate the protective effect of curcumin (Cur) against Cd-induced toxicity in the lung of albino mice.Materials and Methods: Albino mice were divided into 4 groups and 5 mice were kept in each group. The experiment was carried out for 15 and 45 days. Group 1 mice were kept as control. Group 2 mice were given an oral dose of 1mg/kg body weight of Cd on alternate days. Group 3 mice were administered an oral dose of 1mg/kg body weight of Cd on alternate days and 100 mg/kg body weight of Cur daily. Group 4 mice were received an oral dose of 100 mg/kg body weight of Cur daily. Autopsies were done on 15 and 45 days post-treatment.Result: Biochemical observations showed an increased level of lipid peroxidation and decreased the activity of antioxidant enzymes, i.e., superoxide dismutase, catalase, and glutathione peroxidase. However, Cur administration improved the level of malondialdehyde and oxidative stress in lung tissue by its antioxidant activity. Furthermore, cotreatment of Cd and Cur ameliorated the antioxidant level.Conclusion: The results of the present experiment showed the protective action of Cur on the Cd-induced oxidative damage in the lung of mice.

scholarly journals Deep transcriptomic analysis of Chromera velia under Mercury-stress condition

2019 ◽  
Author(s):  
Abdoallah Sharaf ◽  
Roberto De Michele ◽  
Ayush Sharma ◽  
Miroslav Oborník
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Stress Responses ◽  
Control Level ◽  
Transcriptomic Analysis ◽  
Differentially Expressed ◽  
Biotic And Abiotic Stress ◽  
Terrestrial Plants ◽  
Mercury Stress ◽  
Chromera Velia

The heavy metal pollution in ecosystems is of increasing global concern. The main sources of the metal toxicity are the industrial waste, mining and the use of pesticides containing heavy metals. Out of all heavy metals, mercury (Hg) is considered to be the one, easily accumulated in terrestrial plants as well as aquatic organism. Hg can induce more severe oxidative stress by triggering the production of reactive oxygen species (ROS) and damage macro-molecules. ROS serve not only as dangerous molecules that damage proteins, lipids and DNA but also as signalling molecules in the regulation of biological processes such as biotic and abiotic stress responses, growth and development. This study shows the change in the Chromera velia transcriptome due to Hg stress. C. velia is the recently discovered closest known relative of apicomplexans. Our study shows the first deep transcriptomic analysis of C. velia, specifically focusing on the expression level of the genes involved in detoxification defence systems under heavy metal stress. The results show that in total 1239 genes are differentially expressed. DEGs (Differentially expressed genes) showed overall up-regulation (1,070 genes) and only 169 up-regulated genes in cultures under Mercury stress (Cvel_mer) when compared to the control level (Cvel_cont). The qPCR expression analysis exhibited a positive correlation with the findings of RNA-seq data.

Heavy-Metal Content and Oxidative Damage in Hypsiboas faber: The Impact of Coal-Mining Pollutants on Amphibians

2013 ◽  
Vol 66 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Jairo José Zocche ◽  
Luciano Acordi da Silva ◽  
Adriani Paganini Damiani ◽  
Rodrigo Ávila Mendonça ◽  
Poliana Bernardo Peres ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Oxidative Damage ◽  
Coal Mining ◽  
Metal Content ◽  
Heavy Metal Content ◽  
The Impact

scholarly journals Ethanol leaf extract of Ruspolia hypocrateriformis abrogated hepatic redox imbalance and oxidative damage induced by heavy metal toxicity in rats

2020 ◽  
Vol 13 (11) ◽  
pp. 8133-8145
Author(s):  
J.N. Awoke ◽  
O.U. Orji ◽  
P.M. Aja ◽  
N.N. Ezeani ◽  
C. Aloke ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Oxidative Damage ◽  
Metal Toxicity ◽  
Leaf Extract ◽  
Heavy Metal Toxicity ◽  
Redox Imbalance

scholarly journals The Dual Nature of Metallothioneins in the Metabolism of Heavy Metals and Reactive Oxygen Species in Aquatic Organisms: Implications of Use as a Biomarker of Heavy-Metal Effects in Field Investigations

2008 ◽  
Vol 1 ◽  
pp. BCI.S1007 ◽  
Author(s):  
F. Gagné ◽  
C. André ◽  
C. Blaise
Keyword(s):  
Heavy Metals ◽  
Reactive Oxygen Species ◽  
Heavy Metal ◽  
Superoxide Dismutase ◽  
Oxidative Damage ◽  
Reactive Oxygen ◽  
Aquatic Organisms ◽  
Oxygen Species ◽  
Lawrence Estuary ◽  
Generating System

The purpose of this study was to examine the function of metallothioneins (MT) in respect to the mobilization of heavy metals and superoxide anion (O2–) scavenging in aquatic organisms. Using an O2– generating system, liberation of free zinc from native and zinc MT (Zn-MT) was measured in vitro. Addition of the O2– generating system and H2O2 readily increased the di- and trimeric forms of MT as determined by gel electrophoresis analysis. To determine whether the proportion of oxidized MT could change in contaminated environments, metal-contaminated Mya arenaria clams were collected from a harbour in the St. Lawrence Estuary. The levels of labile zinc, superoxide dismutase (O2– scavenging enzyme), lipid peroxidation (LPO) and the oxidized/metallic form of MT were determined in the digestive gland. The results revealed that the induction of total MT levels was the result of increased oxidized MT at the expense of the reduced or metallic form of MT. Both superoxide dismutase (SOD) and labile zinc (Zn) levels were induced and they were significantly correlated with the oxidized form of MT, but not the metallic form, in feral clam populations. We concluded that the level of total MT was related to Zn mobility and the activation of antioxidant mechanisms such as SOD, and corresponded to the levels of oxidized MT. The metallic form of MT was negatively associated with Zn mobility but positively associated with oxidative damage such as LPO. Overall, the oxidized fraction of MT appeared to be more closely related to detoxification, while the metallic form of MT was associated with metal mobility and toxicity via oxidative damage. The protective effect of MT during heavy-metal contamination depends on the availability of metals and on its capacity to sequester reactive oxygen species.

Heavy metal-induced oxidative damage is reduced by β-estradiol application in lentil seedlings

2014 ◽  
Vol 74 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Abdelilah Chaoui ◽  
Ezzedine El Ferjani
Keyword(s):  
Heavy Metal ◽  
Oxidative Damage
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