Interactions between the toxicity of the heavy metals cadmium, copper, zinc in combinations and the detoxifying role of calcium in the brown algaCystoseira barbata

Pellegrini, M.; Laugier, Annick; Sergent, Michèle; Phan‐Tan‐Luu, R.; Valls, Robert; Pellegrini, L.

doi:10.1007/bf02186238

Cited by 30 publications

(11 citation statements)

References 17 publications

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“…In a previous work, we have demonstrated that a brown algae collected from a heavy metal contaminated area accumulated Zn as electron-dense granules in the cell walls in median regions of thallus (Amado Filho et al, 1999). The polyanionic polysaccharides have been proposed as the molecules responsible for the binding of heavy metals when the algae are exposed to high concentrations of these elements (Amado Filho et al, 1996Filho et al, , 1999Andrade et al, 2002;Ballan-Dufranc ßais et al, 1991;Haug et al, 1974;Lignell et al, 1982;Pellegrini et al, 1991Pellegrini et al, , 1993Tretyn et al, 1996;Stengel and Dring, 2000).…”

Section: Acidic Polysaccharides Form the Algal Cell Wall Retain Heavymentioning

confidence: 97%

“…Acidic polysaccharides found in the cell wall of brown algae have also been associated with the capacity of these organisms to accumulate heavy metals when exposed to an environment containing high concentrations of these elements (Amado Filho et al, 1999;Andrade et al, 2002;Lignell et al, 1982;Pellegrini et al, 1993). The negatively charged polysaccharides from the mucilaginous matrix can adsorb and partially exclude mobile anions, and consequently act as cation-exchanger and ionic barrier, selecting the elements that will be absorbed by the algal cells (Kloareg et al, 1986;Mariani et al, 1990;Percival, 1979).…”

Section: Introductionmentioning

confidence: 97%

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Ultrastructure of acidic polysaccharides from the cell walls of brown algae

Andrade

Salgado

Farina

et al. 2004

Journal of Structural Biology

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Section: Acidic Polysaccharides Form the Algal Cell Wall Retain Heavymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Ultrastructure of acidic polysaccharides from the cell walls of brown algae

Andrade

Salgado

Farina

et al. 2004

Journal of Structural Biology

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“…However, there appear to be no data on relative metal selectivity between plants and endomycorrhizal fungi; the obligate nature of the endomycorrhizal association makes it difficult to separate binding to plant root from binding to the fungus. Adsorption on or precipitation of heavy metals in plant cell walls has been reasonably well described (Lignell et al, 1982;Pellegrini et al, 1993;Amado Filho et al, 1999;Andrade et al, 2002), but there is limited information on metal binding by mycorrhizal cell walls. Joner and Leyval (1997) reported that the arbuscular mycorrhizal fungus Glomus mosseae had a high capacity for Cd uptake but they did not distinguish between immobilization on cell walls or in vacuoles.…”

Section: Introductionmentioning

confidence: 98%

Arbuscular mycorrhizal colonisation increases copper binding capacity of root cell walls of Oryza sativa L. and reduces copper uptake

Zhang

Lin

Gao

et al. 2009

Soil Biology and Biochemistry

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a b s t r a c tThere is evidence that colonisation by mycorrhizal fungi can protect host plants from toxic concentrations of heavy metals. The mechanism by which protection is provided by the fungus for any particular metal is poorly understood. Rice (Oryza sativa L.) plants were inoculated with Glomus mosseae and grown for 4 weeks to ensure strong colonisation. The plants were then exposed to low to toxic concentrations of copper (Cu) and the uptake and distribution were examined. The effect of mycorrhizal colonisation on the cell wall composition and Cu binding capacity of roots was also investigated. Mycorrhizal plants showed moderate reductions in Cu concentrations in roots but large reductions in shoots. In roots, mycorrhizal plants accumulated more Cu in cell walls but much less in the symplasm compared to nonmycorrhizal plants. The differences in cell wall binding of Cu could be partly explained by changes in the composition of the cell wall. The mechanistic basis for the reduced Cu accumulation and the potential beneficial consequences of mycorrhizal associations on plant growth in Cu toxic soil are discussed.

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“…Some studies suggested that calcium affects heavy metal toxicity to microbiota and it is playing an important role in ameliorating metal toxicity to algae (Zaki, 1999;Zaki and Fathi, 2004). This protective role is confirmed by cytological investigations (Pellegrini et al, 1993). It has been suggested that an antagonistic interaction between copper and calcium which could be explained by a competition phenomenon due to their very similar ionic (Fernandez-Pinas et al, 1995).…”

Section: Discussionmentioning

confidence: 93%

ABOLISHING TOXICITY OF COPPER BY SOME ENVIRONMENTAL FACTORS USING GREEN ALGA <i>CHLORELLA VULGARIS</i>

Fathi¹,

Azooz²,

Al-Fredan³

2012

American Journal of Environmental Sciences

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A variety of environmental factors are known to modify the toxicity of heavy metals on algae. This study was undertaken to examine the impact of some inorganic and organic complexes on the toxicity of copper using the isolated algal species (Chlorella vulgaris). The data illustrate that the amount of available forms of copper (copper free ions) gradually decreased with increasing the concentrations of all tested inorganic and organic complexes (carbonates, EDTA, Glycine and calcium). The toxicity of a metal is controlled by the concentrations of the available form (s) and not by the total concentration of the metal. In other words, the availability and the toxicity depend on the concentrations of the different physico-chemical forms (speciation) of the metals in their natural environments.

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Interactions between the toxicity of the heavy metals cadmium, copper, zinc in combinations and the detoxifying role of calcium in the brown algaCystoseira barbata

Cited by 30 publications

References 17 publications

Ultrastructure of acidic polysaccharides from the cell walls of brown algae

Ultrastructure of acidic polysaccharides from the cell walls of brown algae

Arbuscular mycorrhizal colonisation increases copper binding capacity of root cell walls of Oryza sativa L. and reduces copper uptake

ABOLISHING TOXICITY OF COPPER BY SOME ENVIRONMENTAL FACTORS USING GREEN ALGA <i>CHLORELLA VULGARIS</i>

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