Antioxidant response of Phragmites australis to Cu and Cd contamination

Rocha, A. Cristina S.; Almeida, C. Marisa R.; Basto, M. Clara P.; Vasconcelos, M. Teresa S. D.

doi:10.1016/j.ecoenv.2014.06.027

Cited by 36 publications

(9 citation statements)

References 49 publications

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“…Guo et al (2007) proposed that the GSH/GSSG ratios could be used as indicators to assess the cellular redox status. Similar suggestions were also reported by Anjum et al (2012) and Rocha et al (2014). Based on our results, the GSH and GSH/GSSG changes could also be used as suitable biomarkers for the redox status resulting from soil Cu stress in the roots.…”

Section: Discussionsupporting

confidence: 89%

“…GSH is the primary component of thiol pools in cells, and it is the precursor for the enzymatic synthesis of metal-chelating peptides such as phytochelatins and metallothioneins, playing roles in heavy metal detoxification and tolerance in plants (Hall 2002). The consumption of GSH and its conversion into oxidized glutathione (GSSG), especially the ratio of GSH/GSSG, can be used as a bioindicator to assess the cellular redox status (Guo et al 2007;Anjum et al 2012;Rocha et al 2014). …”

Section: Introductionmentioning

confidence: 97%

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Toxicological effects, mechanisms, and implied toxicity thresholds in the roots of Vicia faba L. seedlings grown in copper-contaminated soil

Huang

Wang

et al. 2015

Environ Sci Pollut Res

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Copper (Cu) contamination has become a global concern because of industrial, agricultural, and other anthropogenic activities. In the present experiments, the toxicological effects, mechanisms, and potential toxicity thresholds were investigated in the roots of Vicia faba L. seedlings that were cultivated in Cu-amended soils (0, 6.25, 12.5, 25, 50, 100, 200, 400, and 600 mg kg(-1)) for 20 days, based on an analysis of the soil physicochemical properties, native Cu, available Cu, and root-enriched Cu contents. The superoxide dismutase (SOD), ascorbate peroxidase (APX), and guaiacol peroxidase (POD) isozymes and activities, as well as glutathione (GSH) and heat shock protein 70 (HSP70), changed like biphasic dose-response curves, cooperating to control the redox homeostasis. The APX and POD enzymes exhibited enhanced activities and became H2O2 scavengers primarily when the catalase (CAT) activities tended to decrease. Endoprotease (EP) isozymes and activities might be enhanced to degrade carbonylated proteins and alleviate metabolic disturbance in the roots. Additionally, HSP70 may not be suitable as a biomarker for relatively higher soil Cu concentrations and relatively longer exposure times for the roots. As a result, the isozymes and activities of SOD, CAT, and EP, as well as GSH, can be adopted as the most sensitive biomarkers. The toxicity threshold is estimated as 0.76-1.21 mg kg(-1) of available Cu in the soils or 25.04-36.65 μg Cu g(-1) dry weights (DW) in the roots.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 97%

Toxicological effects, mechanisms, and implied toxicity thresholds in the roots of Vicia faba L. seedlings grown in copper-contaminated soil

Huang

Wang

et al. 2015

Environ Sci Pollut Res

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“…A previous investigation suggests that the OAT activity, rather than the PDH activity, is associated with the proline accumulation in Ni- (Lin and Kao 2007), Cu- (Ku et al 2011), and Zn-treated (Li et al 2013) plants. Exposure to HMs has been shown to induce the displacement of nutritional elements (Rocha et al 2014) our studies, was either due to the protective measure adopted by Salicornia plants against oxidative damage and/or could be an increased production of ROS (Yan et al 2008). The change in the activity of antioxidative enzymes is depended on the plant species, age, and duration of the stress (Demirevska-kepova et al 2004).…”

Section: Discussionmentioning

confidence: 72%

Long-Term Effect of Heavy Metal–Polluted Wastewater Irrigation on Physiological and Ecological Parameters of Salicornia europaea L.

Khalilzadeh

Пирзад

Sepehr

et al. 2020

J Soil Sci Plant Nutr

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Irrigation of Salicornia europaea with heavy metal-polluted wastewater is a promising alternative method for risk mitigation of the Urmia Lake ecosystem from uncontrolled sewage. The objective of the study was to evaluate morphological and physicochemical responses of Salicornia europaea under wastewater irrigation at different growth stages. A field experiment was conducted in a split-plot experiment based on randomized complete block design with four replications. Treatments included control and wastewater irrigation (containing zinc (Zn), iron (Fe), copper (Cu), cadmium (Cd), lead (Pb), and nickel (Ni)) at three stages (vegetative, flowering, and reproductive) of plant growth and two times (two and 4 days in each stage). The result showed that the wastewater application at reproductive stage resulted in higher biomass production than that of the control plants. Wastewater irrigation at the flowering stage caused a significant increase in the amount of total chlorophyll and chlorophyll-a, while chlorophyll-b content was decreased at both flowering and reproductive stages. The amount of the total soluble protein was also affected, with wastewater irrigation showing the most significant increase at the reproductive stage. There was significant enhancement of osmolytes in leaves of plant under heavy metal stress, and the increased rate of proline was higher than soluble sugar at the flowering stage. Relative water content in Salicornia was not duration-and time-dependent. A 154% increase in catalase activity, 32% increase in peroxidase activity, and 57% increase in polyphenol oxidase activity were observed in the plant exposed to long-term wastewater duration. Based on the observed positive effect of wastewater on shoot length and weight, total soluble protein, proline, soluble sugar, enzyme activities, and plant biomass of Salicornia europaea, long-term effect of heavy metal-polluted wastewater irrigation can be approved for Salicornia crops in coastal areas.

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“…Antioxidant thiol compounds were probably involved in the mechanisms used by P. australis to alleviate metal toxicity. As P. australis is considered suitable for phytostabilizing metal-contaminated sediments, understanding its tolerance mechanisms to toxic metals is important to optimize the conditions for applying this plant in phytoremediation (Rocha et al, 2014).…”

Section: Bioaccumulation Coefficients Of Aquatic Plantsmentioning

confidence: 99%

Effect of polluted water on soil and plant contamination by heavy metals in El-Mahla El-Kobra, Egypt

Mahmoud¹,

Ghoneim²

2016

Solid Earth

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Abstract. The discharge of untreated waste water in Zefta drain and drain no. 5 is becoming a problem for many farmers in the El-Mahla El-Kobra area, Egypt. The discharged water contains high levels of contaminants considered hazardous to the ecosystem. Some plants, soil, water, and sediment samples were collected from the El-Mahla El-Kobra area to evaluate the contamination by heavy metals. The results showed that the heavy metals, pH, sodium adsorption ratio (SAR), biochemical oxygen demand (BOD), and chemical oxygen demand (COD) in the water of Zefta drain and drain no. 5 exceeded permissible limits for irrigation. In rice and maize shoots grown in soils irrigated by contaminated water from Zefta drain and drain no. 5, the bioaccumulation factors for Cd, Pb, Zn, Cu, and Mn were higher than 1.0. The heavy metals content of irrigated soils from Zefta drain and drain no. 5 exceeded the upper limit of background heavy metals. In this study, the mean contaminant factor values of the drain no. 5 sediments revealed that Zn, Mn, Cu, Cd, Pb, and Ni > 6, indicating very high contamination. The bioaccumulation coefficient values of Cynodon dactylon, Phragmites australis, and Typha domingensis aquatic plants growing in Zefta drain are high. These species can be considered as hyperaccumulators for the decontamination of contaminated water.

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Antioxidant response of Phragmites australis to Cu and Cd contamination

Cited by 36 publications

References 49 publications

Toxicological effects, mechanisms, and implied toxicity thresholds in the roots of Vicia faba L. seedlings grown in copper-contaminated soil

Toxicological effects, mechanisms, and implied toxicity thresholds in the roots of Vicia faba L. seedlings grown in copper-contaminated soil

Long-Term Effect of Heavy Metal–Polluted Wastewater Irrigation on Physiological and Ecological Parameters of Salicornia europaea L.

Effect of polluted water on soil and plant contamination by heavy metals in El-Mahla El-Kobra, Egypt

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