Cadmium effects on growth and mineral nutrition of two halophytes: Sesuvium portulacastrum and Mesembryanthemum crystallinum

Ghnaya, Tahar; Nouairi, Issam; Slama, Inès; Messedi, Dorsaf; Grignon, Claude; Abdelly, Chédly; Ghorbel, Mohamed Habib

doi:10.1016/j.jplph.2004.11.011

Cited by 168 publications

(107 citation statements)

References 40 publications

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“…According to Mengel & Kirkby (1987), K is preferentially transported to the shoots and has close relationships with protein synthe- sis, cytokinin supplies and plant growth, and also serves as a dominant cation for counterbalancing anions in plants (Marschner 1995). Disturbances of K nutrition with Cd exposure have been reported in several studies (Ghnaya et al 2005;Zornoza et al 2002). Changes in shoot translocation of K and other nutrients have also been attributed to vascular system alterations and reductions in the numbers and diameters of xylem elements (Ouzounidou et al 1994).…”

Section: Macronutrient Contentsmentioning

confidence: 99%

“…Heavy metals cannot be biodegraded and thus can only be extracted from contaminated sites (Ghnaya et al 2005). Common physic-chemical techniques used to remediate soils or sediments polluted by metals are usually expensive and unsuitable for situations affecting extensive areas (Dary et al 2010), but biotechnological approaches have received a great deal of attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

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Cadmium effects on mineral nutrition of the Cd-hyperaccumulator Pfaffia glomerata

2013

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A plant's ability to survive in a stressful environment is correlated with its nutritional status, which can be affected by cadmium (Cd) uptake. The present study evaluated the influence of Cd on the concentrations and distributions of nutrients in the roots and shoots of the Cd-hyperaccumulator Pfaffia glomerata (Sprengel) Pedersen. Plantlets were cultivated in nutrient solutions containing increasing Cd concentrations during 20 days under greenhouse conditions, and the concentrations of Cd and essential macro-(N, P, K, Ca, Mg and S) and micro-(Zn, Fe, Mn, Cu) elements in the roots and shoots were subsequently determined. Cd did not affect the plant biomass production. Cd accumulation was found to be higher in roots than in shoots, and influenced the distribution of macro and micro elements in those plants. Despite the high phytotoxicity of this element, our results indicated the existence of Cd-tolerance mechanisms in both nutrient uptake and distribution processes that enabled these plants to survive in Cd-contaminated sites.

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Section: Macronutrient Contentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cadmium effects on mineral nutrition of the Cd-hyperaccumulator Pfaffia glomerata

2013

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“…27,28 The effect of Cd on nitrate and S assimilation has been studied in several plants showing an inhibition of the nitrate uptake rate and the activity of the enzymes involved in the N assimilation pathway. 11,[29][30][31][32][33][34][35] Alternatively, Cd-caused induction of enzymes of S assimilation pathway has been reported in many plants. 19,36,37 Therefore, the regulation of S assimilation may be necessary to ensure an adequate supply of S compounds required for heavy metal tolerance.…”

Section: Cadmium Stress Tolerance In Crop Plantsmentioning

confidence: 99%

“…39 The effect of Cd on N and S assimilation pathway has been studied in several plants showing an inhibition of the nitrate uptake rate and the activity of the enzymes involved in the nitrate assimilation pathway. [31][32][33][34][35] It has been reported that metal exposure to plants also leads to a significant alteration in S metabolism. 80 It caused induction of enzymes of S assimilation pathway in plants.…”

Section: Cadmium Stress and Sulfur Metabolismmentioning

confidence: 99%

Cadmium stress tolerance in crop plants

Gill

Tuteja

2011

Plant Signaling & Behavior

339

137

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“…Le cadmium (cd) est parmi les métaux lourds les plus toxiques; il constitue un problème majeur pour l'environnement et la santé humaine (Sanita di toppi & Gabbrielli, 1999 ;Benavides et al, 2005). Plusieurs études ont montré que la présence du cadmium dans le milieu de culture peut se traduire, au delà d'une certaine limite, par l'apparition de symptômes d'intoxication et de chlorose, accompagnés d'une inhibition de la croissance pondérale des plantes (Baryla et al, 2001 ;Shevyakova et al, 2003 ;Ghnaya et al, 2005). En outre, le cadmium est susceptible de perturber la nutrition minérale des plantes en interférant avec l'assimilation de certains éléments essentiels (fer, magnésium, calcium…), soit par substitution, soit par compétition au niveau des sites d'absorption membranaire (Sanita di toppi & Gabbrielli, 1999).…”

Section: Introductionunclassified

Le calcium peut-il protégerAtriplex halimussubsp.schweinfurthiicontre la toxicité du cadmium ?

Nedjimi¹

2009

Acta Botanica Gallica

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To cite this article: Bouzid Nedjimi (2009) Le calcium peut-il protéger Atriplexhalimus subsp. schweinfurthii contre la toxicité du cadmium ?, Acta Botanica Gallica, 156:3, 391-397, DOI: 10.1080/12538078.2009 des steppes salées algériennes) ont été cultivés en condition hydroponique pour étudier l'effet de l'addition du calcium (Ca) dans la solution nutritive sur des plantes stressées par 400 µM CdCl 2 . Les traitements utilisés sont: 1) la solution nutritive de base (T) ; 2) la solution nutritive contenant 400 µM CdCl 2 ; 3) 400 µM CdCl 2 supplémenté par 20 mM CaCl 2 (CdCl 2 + Ca*) ; 4) 400 µM CdCl 2 supplémenté par 40 mM CaCl 2 (CdCl 2 + Ca**). Les résultats obtenus ont montré que le Cd entraîne une inhibition de la croissance pondérale, une réduc-tion des pigments chlorophylliens ainsi qu'une diminution des teneurs en Ca et du fer tissulaires, avec une accumulation du Cd surtout dans la partie racinaire. L'addition simultanée du Cd et de Ca dans le milieu de culture améliore la production de biomasse végétale en concomitance avec une amélioration de la composition minérale de la plante (Ca et Fe), une diminution des teneurs en Cd tissulaire, avec une augmentation des contenus en pigments photosynthétiques. L'ensemble de ces résultats suggère que l'effet négatif du Cd sur certains processus de croissance peut être atténué par un apport adéquat en Ca dans le milieu de culture.Mots clés : Atriplex halimus -cadmium -calcium -chlorophylle -fer.Abstract.-Atriplex halimus subsp. schweinfurthii (native halophyte in Algerian salt steppes) was grown in hydroponic conditions to investigate the effectiveness of supplementary calcium (Ca) applied into nutrient solution on plants grown at high (400 µM) CdCl 2 concentration. Treatments were: 1) control: nutrient solution alone (T); 2) nutrient solution plus 400 µM CdCl 2 ; 3) nutrient solution and 400 µM CdCl 2 plus supplementary 20 µM Ca (CdCl 2 + Ca*); 4) 400 µM CdCl 2 plus additional mixture of 40 mM CaCl 2 in nutrient solution (CdCl 2 + Ca**). Plants subjected to high CdCl 2 level exhibited a severe chlorosis, accompanied by a significant biomass reduction. Calcium, iron and chlorophyll content of plants grown at high CdCl 2 were less than those at normal nutrient solution. Supplementary Ca ameliorated the negative effects of Cd on plant growth, chlorophyll, Ca and Fe contents. Cadmium concentration in plant tissues increased in both shoots and roots at high CdCl 2 level, but it was reduced partially by supplementary Ca. These results indicate that calcium can protect A. halimus from Cd toxicity.

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Cadmium effects on growth and mineral nutrition of two halophytes: Sesuvium portulacastrum and Mesembryanthemum crystallinum

Cited by 168 publications

References 40 publications

Cadmium effects on mineral nutrition of the Cd-hyperaccumulator Pfaffia glomerata

Cadmium effects on mineral nutrition of the Cd-hyperaccumulator Pfaffia glomerata

Cadmium stress tolerance in crop plants

Le calcium peut-il protégerAtriplex halimussubsp.schweinfurthiicontre la toxicité du cadmium ?

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