Cadmium availability to the cyanobacterium Synechocystis aquatilis in solutions containing chloride

Skowroñski, Tadeusz; Szubińska, Stanisława; Jakubowski, M.; Pawlik, B.

doi:10.1016/0269-7491(92)90104-i

Cited by 10 publications

(6 citation statements)

References 17 publications

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“…The assumed preferential complexation of hard metals by hard ligands and of soft metals by soft ligands, upon which this argument is based, was confirmed in this investigation by uptake inhibition studies using exogenously supplied anions. As in other investigations of anion effects on metal uptake by microorganisms (22,24), increasing anion concentrations resulted in overall increased inhibitory effects on metal uptake by S. cerevisiae, presumably through the formation of less cationic, neutral or anionic metal complexes. The small increase in Mn2", Zn2+, and Cd2+ uptake that resulted at the highest S2032concentration examined (0.25 M) suggested that, in contrast to the effect of coordination with Clon cyanobacterial Cd2+ uptake (22), the formation of anionic metal complexes with S2032may cause some facilitated adsorption to, or permeation through, the cell surface of S. cerevisiae.…”

Section: Discussionsupporting

confidence: 68%

Mechanism of adsorption of hard and soft metal ions to Saccharomyces cerevisiae and influence of hard and soft anions

Avery

Tobin

1993

Appl Environ Microbiol

133

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The applicability of the hard-and-soft principle of acids and bases in predicting metal adsorption characteristics in a biological context was investigated for metabolism-independent uptake of the metal ions Sr2+, Mn2+, Zn2+, Cu2+, Cd2+, and Tl+ by Saccharomyces cerevisiae. Metal adsorption increased with external metal concentration (5 to 50 ,uM), although some saturation of uptake of the harder ions examined, Sr2', Mn2 , and Zn2+, was evident at the higher metal concentrations. Cation displacement experiments indicated that, with the exception of Tl+, relative covalent bonding (H+ displacement) of the metals was greater at low metal concentrations, while weaker electrostatic interactions (Mg2+ plus Ca2+ displacement) became increasingly important at higher concentrations. These results were correlated with curved Scatchard and reciprocal Langmuir plots of metal uptake data. Saturation of covalent binding sites was most marked for the hard metals, and consequently, although no relationship between metal hardness and ionic/covalent bonding ratios was evident at 10 ,uM metal, at 50 ,uM the ratio was generally higher for harder metals. Increasing inhibition of metal uptake at increasing external anion concentrations was partially attributed to the formation of metal-anion complexes. Inhibitory effects of the hard anion S042 were most marked for uptake of the hard metals Sr2+ and Mn2+, whereas greater relative effects on adsorption of the softer cations Cu2' and Cd2+ were correlated with complexation by the soft anion S2032. Inhibition of uptake of the borderline metal Zn2+ by S042-and that by S2032were approximately equal. The results showed good agreement with the hard-and-soft principle with respect to both the nature of bonding and preferred ligand binding of the metals examined, and the implications for biological systems are discussed.

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Section: Discussionsupporting

confidence: 68%

Mechanism of adsorption of hard and soft metal ions to Saccharomyces cerevisiae and influence of hard and soft anions

Avery

Tobin

1993

Appl Environ Microbiol

133

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“…On the other hand, Cd inhibited NRT1.1-mediated NO 3 − uptake in Arabidopsis and Brassica [ 43 , 44 , 45 ]. Studies with Synechocystis aquatilis algae have shown reduced Cd uptake in nitrates and chlorides, with less Cd accumulated by algae in chlorides [ 11 ]. Unlike in soils, the formation of CdCl n 2− n complexes decreases Cd 2+ availability in the nutrient solution [ 26 ].…”

Section: Discussionmentioning

confidence: 99%

“…The above-mentioned differences in the contents of microelements can also be a result of the fact that the microelements participate in different (unequal) shares on the germination capacity of seeds [ 54 ]. The reaction of germinating seeds to cadmium ions is a complex, phytohormone-regulated interplay of various membrane transporters that is likely to be determined by the genotype as well as by the concentration of the applied metal and its speciation [ 11 , 58 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Cadmium Chloride and Cadmium Nitrate on Growth and Mineral Nutrient Content in the Root of Fava Bean (Vicia faba L.)

Piršelová

Ondrušková

2021

Plants

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The present study aimed to analyze the differences in the tolerance of fava bean (Vicia faba cv. Aštar) roots to cadmium in nitrate—Cd(NO3)2—and chloride—CdCl2—solutions. The physiological and biochemical parameters were assessed. The tested doses of Cd (50, 100, 150 and 300 mg/L) did not influence the germination of seeds. However, considerable growth inhibition and dehydration were observed after 96 h incubation. The thickness of roots and rupture of cell membranes increased along with the increasing concentration of the metal in the solution. At a Cd dose of 300 mg/L, irrespective of the solution used, increased nitrogen concentration and no change in sodium content were observed. The content of magnesium increased due to the dose of 100 mg/L (cadmium nitrate) and the content of calcium increased due to the dose of 300 mg/L (in either nitrate or chloride). The correlation analyses pointed to a possible effect of nitrates in the applied solutions on the accumulation of Cd and some minerals in the roots of the given variety of fava bean. This may be important for both research and agricultural practice. The identification of crops with high tolerance to cadmium, as well as knowledge about the mechanisms of ion interactions at the soil solution–plant level, is important in terms of such crops’ use in the process of the remediation of cadmium-contaminated soils coupled with food production.

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“…The results suggested that not only is biomass important in metal absorption but also illustrates the importance of pH dependence with alkaline or acidic conditions promoting complexing of metallic ions rather than biomass absorption. For example, it was observed in the case of Cd(II) that complex forms were less likely to be adsorbed onto EPS of Synechocystis aquatilis particularly in the presence of chloride [55]. In mixed metal streams there may be competition between various metal cations for binding onto EPS.…”

Section: Binding Of Other Important Metals By Synechocystismentioning

confidence: 99%

The Potential of the Photoautotroph Synechocystis for Metal Bioremediation

Pembroke¹,

Naveena²,

Armshaw³

2015

Advances in Bioremediation of Wastewater and Polluted Soil

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Cadmium availability to the cyanobacterium Synechocystis aquatilis in solutions containing chloride

Cited by 10 publications

References 17 publications

Mechanism of adsorption of hard and soft metal ions to Saccharomyces cerevisiae and influence of hard and soft anions

Mechanism of adsorption of hard and soft metal ions to Saccharomyces cerevisiae and influence of hard and soft anions

Effect of Cadmium Chloride and Cadmium Nitrate on Growth and Mineral Nutrient Content in the Root of Fava Bean (Vicia faba L.)

The Potential of the Photoautotroph Synechocystis for Metal Bioremediation

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