Characteristics of heavy metal uptake by plant species with potential for phytoremediation and phytomining

Nedelkoska, Tatjana V.; Doran, Pauline M.

doi:10.1016/s0892-6875(00)00035-2

Cited by 153 publications

(68 citation statements)

References 35 publications

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“…One of the major sources of addition of Cd into agricultural soils is the application of phosphate fertilizers (Grant and Sheppard, 2008). The other sources for increasing Cd pollution in the soil are industrial effluents such as manufacture of plastics, paint pigments, batteries, alloy making, electroplating and manures (Devkota and Schmidt, 2000;Nedelkoska and Doran, 2000;Yang et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Alleviating Effect of Exogenous Application of Ascorbic Acid on Growth and Mineral Nutrients in Cadmium Stressed Barley (Hordeum vulgare) Seedlings

Ullah¹,

Javed²,

Wahid³

et al. 2015

IJAB

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An experiment was carried out in sand-filled pots under normal temperature (28±2ºC) to assess the role of exogenously applied ascorbic acid in alleviating the effect of cadmium (Cd) stress on four barley (Hordeum vulgare L.) genotypes (Jau-83, Jau-87, Paidar 91 and Haider 93). After germination, seedlings were exposed to different Cd concentrations (0, 100, 300, 500 and 700 µM CdCl2) along with AsA (200 mg L -1 ) and grown for 15 days. The results suggested that exposure to increased Cd levels caused a significant reduction in growth and mineral nutrients contents of barley seedlings. However, there was a noticeable difference in the effect of Cd on mineral concentrations among genotypes and the difference mainly coincided with differential accumulation of Cd in the shoot and root tissues. When AsA was applied to Cd-stressed plants, it decreased Cd accumulation in shoots and roots and also showed partial reversal of Cd stress effects. It was also observed that at the same Cd concentrations Cd tolerance index of Jau-83 was the highest among the four barley genotypes, indicating that Jau-83 had lower Cd contents in roots may be more tolerant to Cd stress. The application of AsA was effective in reducing the toxicity of increased Cd by reducing the root or shoots Cd contents, as well as by improving the seedling growth attributes and the mineral nutrients in barley.

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Section: Introductionmentioning

confidence: 99%

Alleviating Effect of Exogenous Application of Ascorbic Acid on Growth and Mineral Nutrients in Cadmium Stressed Barley (Hordeum vulgare) Seedlings

Ullah¹,

Javed²,

Wahid³

et al. 2015

IJAB

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“…Unless control experiments with inactivated cells are carried out, passive removal of metals from solution by precipitation and the association of fine precipitates with the biomass could be misinterpreted as active metal uptake by cultured plant cells; precipitation of metal phosphates may also reduce the availability of phosphorus to the cells so that metabolism becomes phosphate-limited. Chelating agents such as ethylene diaminetetraacetic acid (EDTA) have been applied to prevent metal precipitation in plant tissue cultures (Nedelkoska and Doran, 2000a): EDTA is already present in most plant cell culture and many hydroponics media to overcome Fe deficiency. Metal-EDTA chelates are taken up into the root, xylem, and leaf tissues of plants (Schaider et al, 2006); however they are considered, in the absence of a specific nutrient transporter, to be too large and hydrophilic to cross cytoplasmic membranes into individual cells (Bell et al, 2003).…”

Section: Uptake Studiesmentioning

confidence: 99%

Application of plant tissue cultures in phytoremediation research: Incentives and limitations

Doran

2009

Biotech & Bioengineering

153

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The aim of this review is to critically assess the benefits and limitations associated with the use of in vitro plant cell and organ cultures as research tools in phytoremediation studies. Plant tissue cultures such as callus, cell suspensions, and hairy roots are applied frequently in phytoremediation research as model plant systems. In vitro cultures offer a range of experimental advantages in studies aimed at examining the intrinsic metabolic capabilities of plant cells and their capacity for toxicity tolerance. The ability to identify the contributions of plant cells to pollutant uptake and detoxification without interference from microorganisms is of particular significance in the search for fundamental knowledge about plants. However, if the ultimate goal of plant tissue culture experiments is the development of practical phytoremediation technology, the limitations inherent in the use of in vitro cultures as a representative of whole plants in the field must be recognized. The bioavailability of contaminants and the processes of pollutant uptake and metabolite distribution are likely to be substantially different in the two systems; this can lead to qualitative as well as quantitative differences in metabolic profiles and tolerance characteristics. Yet, many studies have demonstrated that plant tissue cultures are an extremely valuable tool in phytoremediation research. The results derived from tissue cultures can be used to predict the responses of plants to environmental contaminants, and to improve the design and thus reduce the cost of subsequent conventional whole plant experiments.

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“…[32]. At high concentrations, all heavy metals have strong toxic effects and are regarded as environmental pollutants [33,34]. They may alter the reaction rates and influence the kinetics properties of enzymes which cause changes in metabolism of plant, or any excessive amount of heavy metals may drive the oxidative stress [35].…”

Section: Introductionmentioning

confidence: 99%

Characterization of β-galactosidase in the Crude Plant Extract of <i>Artemisia judaica</i> L. in Presence and Absence of Some Heavy Metals

Atrooz¹,

Abukhalil²,

Al-Rawashdeh³

2016

AJLS

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β-galactosidase (EC 3.2.1.23) is important in the formation of a medicinal plant Artemisia judaica (al-ba'atharan) aroma. The crude plant extracts of Artemisia judaica were used to characterize the enzyme in the term of pH, temperature, enzyme kinetic and effects of some heavy metals on its activity. The enzyme activity was measured by its ability to hydrolyze the substrate 2-nitrophenyl β-D-galactopyranoside (ONPG). The enzyme activity was reached maximum at 50°C and at pH 6.0. The K m and V max values of the enzyme were 3.6 mM and 1.67 µmol/min, respectively. Uncompetitive inhibition was observed in presence of Hg +2 , Fe +3 and Zn +2 for the enzyme β-galactosidase in the crude extract through the decrease in the K m and V max values. Pb +2 and Cu +2 were found to act as a noncompetitive inhibitors on the enzyme β-galactosidase in the crude extract due to increase in the K m values and decrease in V max values. The study showed that Hg +2 was the most potent inhibitor while Cu +2 exhibited the least inhibition degree on β-galactosidase activity in the Artemisia judaica. These finding indicated that the enzyme β-galactosidase in the crude leaves extract of Artemisia judaica can be used in industrial and medical applications.

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Characteristics of heavy metal uptake by plant species with potential for phytoremediation and phytomining

Cited by 153 publications

References 35 publications

Alleviating Effect of Exogenous Application of Ascorbic Acid on Growth and Mineral Nutrients in Cadmium Stressed Barley (Hordeum vulgare) Seedlings

Alleviating Effect of Exogenous Application of Ascorbic Acid on Growth and Mineral Nutrients in Cadmium Stressed Barley (Hordeum vulgare) Seedlings

Application of plant tissue cultures in phytoremediation research: Incentives and limitations

Characterization of β-galactosidase in the Crude Plant Extract of <i>Artemisia judaica</i> L. in Presence and Absence of Some Heavy Metals

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Characteristics of heavy metal uptake by plant species with potential for phytoremediation and phytomining

Cited by 153 publications

References 35 publications

Alleviating Effect of Exogenous Application of Ascorbic Acid on Growth and Mineral Nutrients in Cadmium Stressed Barley (Hordeum vulgare) Seedlings

Alleviating Effect of Exogenous Application of Ascorbic Acid on Growth and Mineral Nutrients in Cadmium Stressed Barley (Hordeum vulgare) Seedlings

Application of plant tissue cultures in phytoremediation research: Incentives and limitations

Characterization of β-galactosidase in the Crude Plant Extract of &lt;i&gt;Artemisia judaica&lt;/i&gt; L. in Presence and Absence of Some Heavy Metals

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Characterization of β-galactosidase in the Crude Plant Extract of <i>Artemisia judaica</i> L. in Presence and Absence of Some Heavy Metals