Bioaccumulation du Cd et du Zn chez les plants de tomates (Lycopersicon esculentum L.)

Sbartai, Hana; Djebar, M. R.; Sbartai, Ibtissem; Berrabbah, Houria

doi:10.1016/j.crvi.2012.08.001

Cited by 21 publications

(10 citation statements)

References 45 publications

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“…However, our findings are in contrast to those reported by Sbartai et al, (2012) who showed that exposure of tomato plants to Cd induced a decrease in the content of Chlorophyll a and b, while the low concentration Zn stimulated their biosynthesis. Otherwise, Lei et al, (2012) noted a decline in chlorophyll content after exposure of Seagrass Thalassia hemprichii species to higher Zn and Cd concentrations which could be due to the disruption and damage of chloroplasts and the reduced number of thylakoids as well as the inhibition of nutrient absorption.…”

Section: Discussioncontrasting

confidence: 99%

Photosynthetic Performance of Paulownia tomentosa (Thunb) Steud. Exposed to Heavy Metals Zinc and Cadmium

Nada¹,

Yousr²,

Laribi³

et al. 2014

GJAS

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The present study was carried out to assess the alteration in photosynthetic performance of Paulownia tomentosa seedlings produced in vitro and cultivated under glass house when exposed to trace metals: zinc (Zn) and cadmium (Cd). In this respect, Zn and Cd were added to the substrates of culture at various concentrations: Zn (250, 500, 750 and 1000 µM) and Cd (25, 50 and 75 µM). A nonsupplemented substrate with metal salts was served as a control. The photosynthetic activity was evaluated through measurements of chlorophyll fluorescence and the photosynthetic pigments, namely chlorophyll a, chlorophyll b and total chlorophyll as well as the carotenoids. Main results showed that the initial fluorescence (F0) values were higher in plants grown on Zn added substrate compared to those grown in the presence of Cd. However, the Fv/Fm ratio which indicates the efficiency of photosystem II, ranged from 0.78 to 0.82 for all treatments. Additionally, the presence of 75µM Cd in the substrate stimulates the biosynthesis of chlorophyll pigments by increasing their proportions about approximately 196.77%, in comparison to the control. On the contrary, Zn significantly reduced the contents of these pigments by 9.45% compared to the control. Besides, when the Cd concentrations were 25, 50 and 75µM and Zn concentration was 250µM, the carotenoid contents increased up to 115.51%, 253.07%, 239.19% and 87.56% respectively, in comparison to the control, was noted. Overall, results of this study proved the ability of Paulownia tomentosa to maintain its photosystem activity even on Zn and Cd contaminated sites, despite the restrictive effect of Zn on the biosynthesis of photosynthetic pigments when its concentration exceeds 500 µM.

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Section: Discussioncontrasting

confidence: 99%

Photosynthetic Performance of Paulownia tomentosa (Thunb) Steud. Exposed to Heavy Metals Zinc and Cadmium

Nada¹,

Yousr²,

Laribi³

et al. 2014

GJAS

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“…These mechanisms include the chelation and sequestration of ions by specific ligands to maintain them at low levels in the cytosol (Sbartai et al, 2012). Chelation of trace elements is a ubiquitous detoxification strategy described in a wide range of plants (Yadav, 2010).…”

Section: Introductionmentioning

confidence: 99%

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

Bankaji¹,

Sleimi²,

Gómez-Cádenas

2017

Span. j. agric. res.

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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 Cd 2+ or Cu 2+ (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 Mg 2+ ), oxidative damage and antioxidative metabolism. Data indicate that shoot and root weight significantly decreased as a consequence of Cd 2+ -or Cu 2+ -induced stress. Metallic stress leads to unbalanced nutrient uptake by reducing the translocation of K + and Mg 2+ 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.Additional key words: Atriplex halimus; oxidative damage; trace element toxicity; salinity Abbreviations used: APX (ascorbate peroxidase); CAT (catalase); DTNB (dinitrobenzoic acid); FW (fresh weight); GPX (guaiacol peroxidase); GSH (reduced glutathione); GSSG (oxidised glutathione); MDA (malondialdehyde); PC (phytochelatin); ROS (reactive oxygen species); SOD (superoxide dismutase); tGSH (total GSH) Authors' contributions: Cation determination assays: IB. Coordinated the obtention and culture of the plants and was responsible for conducting different experiments and the evaluation of plants: NS. Responsible of the study of the antioxidative system, evaluating the antioxidant enzymatic activities as well as MDA; he also was in charge of glutathione and phytochelatin content determination: AGC. Coordination of the works and preparing the manuscript: RMPC.Citation: Bankaji, I.; Sleimi, N.; Gómez-Cadenas, A.; Pérez-Clemente, R. M. (2016). NaCl protects against Cd and Cu-induced toxicity in the halophyte Atriplex halimus.

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“…Farmers used wastewater in irrigation, because they were rich in nutrients elements [5]. The pollutants located in wastewater can be accumulated in the soil, can be absorbed by plants [6,7], and can be also percolated from groundwater [8]. The toxicity of heavy metals is mainly due to their tendency to accumulate in living organisms and to concentrate along trophic chains [9].…”

Section: Introductionmentioning

confidence: 99%

Chemical Modification of Polystyrene Merrifield: Extraction of Zinc and Magnesium Located in Wastewater

Dardouri¹,

Elamari²,

Ammari³

et al. 2019

AJPST

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In order to remove metals (Zn & Mg) located in wastewater, a new series of clickable polystyrene Merrifield grafted with azide and alkynes were synthesized and implicated in this domain. In a first step, we transformed the polystyrene Merrifield into the known Azidomethyl polystyrene, in a second step, a coupling reaction between the Azidomethyl polystyrene and dipropargylamine was realized for the synthesis of a new terminated polystyrene alkyne containing one unit of (1,4)-triazole. To increase the length of the chain grafted on the polystyrene Merrifield, several coupling reactions are applied, the main idea of this work was to increase the number of (1,2,3)-triazole units of this grafted chain. The click chemistry based on the Huygens's reaction catalyzed by copper (I) was used in this synthesis, the new polymers containing (1,4)-disubstituted triazole are tested for the extraction of Mg and Zn located in wastewater. The structure of new obtained polymers was confirmed by infrared spectroscopy (ATR-FTIR), UV-visible spectroscopy and elemental analysis for nitrogen. Differential Thermal Analysis (DTA) and Thermo Gravimetric Analysis (TGA) were used to study crosslinking behavior of these polymers. This study shows a low selectivity of studied polymers for the retention of magnesium, while for the Zinc, the percentage removal was average, it's in the order of 30%.

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Bioaccumulation du Cd et du Zn chez les plants de tomates (Lycopersicon esculentum L.)

Abstract: Biologie et pathologie ve ´ge ´tales/Plant biology and pathology Bioaccumulation du Cd et du Zn chez les plants de tomates (Lycopersicon esculentum L.) Bioaccumulation of cadmium and zinc in tomato (Lycopersicon esculentum L.

Cited by 21 publications

References 45 publications

Photosynthetic Performance of Paulownia tomentosa (Thunb) Steud. Exposed to Heavy Metals Zinc and Cadmium

Photosynthetic Performance of Paulownia tomentosa (Thunb) Steud. Exposed to Heavy Metals Zinc and Cadmium

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

Chemical Modification of Polystyrene Merrifield: Extraction of Zinc and Magnesium Located in Wastewater

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