Chloride salinity reduces cadmium accumulation by the Mediterranean halophyte species Atriplex halimus L.

Lefèvre, Isabelle S.; Marchal, Geoffrey; Meerts, Pierre Jacques; Corréal, Enrique; Lutts, Stanley

doi:10.1016/j.envexpbot.2008.07.005

Cited by 170 publications

(95 citation statements)

References 48 publications

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“…Supplementation of the irrigation solution with NaCl would increase the area and thickness of the leaves and the number of lateral roots, causing increases in the efficiency of photosynthesis and the uptake of water and nutrition in the root system, thereby increasing the biomass of the plants under Cd 2+ or Cu 2+ stress conditions. Indeed, our results are in agreement with those reported by Lefévre et al (2009) and Han et al (2012) in the halophyte species A. halimus and Kosteletzkya virginica. According to these authors, a beneficial impact of exogenous NaCl on plant response to Cd 2+ may be, at least partly, linked to NaCl-induced growth stimulation classically reported for halophyte at moderate salinities, which therefore leads to a dilution effect.…”

Section: Glutathione and Phytochelatin Contentssupporting

confidence: 93%

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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Section: Glutathione and Phytochelatin Contentssupporting

confidence: 93%

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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“…This is important, since contaminated soils at former mine sites are often saline (Clemente et al, 2012). Lefèvre et al (2009) found no effect of Cd on soluble sugars accumulation, but did find accumulation of GB, proline, spermine and spermidine, as with salt exposure (Ben Hassine et al, 2009). Nedjimi (2009 found that high external concentrations of calcium inhibit Cd uptake by A. halimus, suggesting that tolerance might be greater on calcareous soils.…”

Section: Trace Elementsmentioning

confidence: 93%

“…Experiments performed with A. halimus in pots of contaminated soil (Manousaki and Kalogerakis, 2009;Martí nezFernández and Walker, 2012;Pérez-Esteban et al, 2013), in hydroponic culture (Lefèvre et al, 2009;Lutts et al, 2004) or in Petri dishes (Márquez-Garcí a et al, 2013) show that its growth is tolerant of high concentrations of Cd, Cu, Mn, Ni, Pb or Zn in the medium. Lutts et al (2004) found that a 3-week exposure to elevated external Cd, whch produced leaf DM Cd concentrations as high as 618 μg g -1 , did not reduce shoot growth significantly, for plants of A. halimus grown from seeds of a population from a contaminated site in southern Spain.…”

Section: Trace Elementsmentioning

confidence: 99%

“…This indicates a very-high degree of tolerance, since values in excess of 5 μg g -1 are generally phytotoxic (Kabata-Pendias, 2001). The Cd tolerance mechanisms may include precipitation with oxalate in the stems and excretion into vesiculated hairs (Lefèvre et al, 2009). In saline nutrient solutions (containing high levels of KCl or NaCl), Cd tolerance is greater and coincides with decreased Cd uptake -possibly resulting from the formation of Cd-Cl complexes which are taken up to a lesser extent than Cd 2+ (Lefèvre et al, 2009).…”

Section: Trace Elementsmentioning

confidence: 99%

“…The Cd tolerance mechanisms may include precipitation with oxalate in the stems and excretion into vesiculated hairs (Lefèvre et al, 2009). In saline nutrient solutions (containing high levels of KCl or NaCl), Cd tolerance is greater and coincides with decreased Cd uptake -possibly resulting from the formation of Cd-Cl complexes which are taken up to a lesser extent than Cd 2+ (Lefèvre et al, 2009). This is important, since contaminated soils at former mine sites are often saline (Clemente et al, 2012).…”

Section: Trace Elementsmentioning

confidence: 99%

See 2 more Smart Citations

The tolerance of Atriplex halimus L. to environmental stresses

Walker¹,

Lutts²

2014

Emir. J. Food Agric

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Atriplex halimus L. (Amaranthaceae) (Mediterranean Saltbush) is a perennial, halophytic shrub that possesses the C4 photosynthetic anatomy and physiology. It grows under semi-arid and arid conditions (annual rainfall < 600 mm) from Macaronesia, through the Mediterranean basin countries and into western Asia, being particularly common on saline and degraded soils. Many studies have shed light on the physiological and biochemical mechanisms that, together with the morphological and anatomical features of this species, contribute to its notable tolerance of important abiotic stresses: salinity, drought, extreme temperatures and soil contamination by trace elements. These will be discussed here, highlighting their shared and distinct features. Certain processes are common to two or more stress responses: for example, vacuolar accumulation of sodium and the cytoplasmic accumulation of compatible osmolytes -part of the process of osmotic adjustment -are vital components of the adaptation to drought, salinity and cold. Others, such as oxalate accumulation upon trace elements exposure, seem to be stress-specific, while leaf surface vesiculated hairs (trichomes) and abscisic acid have distinct functions according to the stress. The relevance of these mechanisms to the use of A. halimus in soil remediation and as livestock forage is discussed.

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Sodium chloride enhances cadmium tolerance through reducing cadmium accumulation and increasing anti‐oxidative enzyme activity in tobacco

Zhang

Shang

Zhang

et al. 2013

Enviro Toxic and Chemistry

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The effect of sodium chloride (NaCl) on cadmium (Cd) uptake, translocation, and oxidative stress was investigated using 2 tobacco cultivars differing in Cd tolerance. The growth inhibition of the tobacco plants exposed to Cd toxicity was in part alleviated by moderate addition of NaCl in the culture solution. Cadmium concentration of shoots and roots in the 2 cultivars increased with increasing Cd levels in the solution and decreased with the addition of NaCl. The addition of NaCl could alleviate the oxidative stress caused by Cd toxicity, as reflected by reduced production of malondialdehyde and recovered or enhanced activities of antioxidative enzymes catalase and glutathione peroxidase. The results also showed that the enhancement of antioxidative enzyme activity by NaCl for the tobacco plants exposed to Cd stress is related to induced Ca signaling.

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Chloride salinity reduces cadmium accumulation by the Mediterranean halophyte species Atriplex halimus L.

Cited by 170 publications

References 48 publications

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

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

The tolerance of Atriplex halimus L. to environmental stresses

Sodium chloride enhances cadmium tolerance through reducing cadmium accumulation and increasing anti‐oxidative enzyme activity in tobacco

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