plants selenium transgenic

  • Biotech Plants for Bioremediation | ISAAA

    Transgenic Arabidopsis plants expressing a selenocysteine methyltransferase (SMTA) gene from the selenium hyperaccumulator Astralagus bisulcatus contain eight times more selenium in their biomass when grown on selenite compared to non-transgenic

  • Transgenic Plants Remove More Selenium From …

     · In the field trial, the APS plant line absorbed 4.3 times more selenium than the wild-type plants. The other two transgenic lines were engineered …

  • Transgenic plants shown to clean up contaminated soil …

    Gary Bañuelos, soil scientist with the USDA Agricultural Research Service, inspects the leaves of a transgenic Indian mustard plant used to remove selenium from contaminated soil. by Sarah Yang BERKELEY — In the first field trial of plants genetically tweaked to absorb more contaminants, researchers found that the transgenic plants handily beat out their wild-type counterparts. The ...

  • Overexpression of Selenocysteine Methyltransferase in Arabidopsis and Indian Mustard Increases Selenium …

    creating transgenic plants with superior phytoreme-diation potential by transforming fast-growing plants with genes from hyperaccumulator plants (Terry et al., 2000). The key step in this strategy is to identify which hyperaccumulator genes to transfer to fast

  • [PDF]

    The element selenium (Se) is chemically similar to sulfur (S). For this reason plants and other organisms mistakenly take up and metabolize Se via S transporters and biochemical pathways. This can cause toxicity due to a combination of (1) oxidative stress caused directly by selenocompounds and (2) replacement of S by Se in proteins and other S compounds, which disrupts their function. On the ...

  • Enhanced Selenium Tolerance and Accumulation in …

     · The transgenic SL plants contained a protein that reacted with antiserum raised against the mouse SL enzyme (Fig. 2A), which was of the expected size (43 kD) and not present in wild-type plants. Therefore, it was concluded that the mouse SL protein is expressed in the transgenic plants, and that the transit sequence is cleaved off in the chloroplastic lines.

  • Biofortification of UK food crops with selenium | …

     · Bañuelos, G Terry, N LeDuc, DL Pilon-Smits, EAH Mackey, B (2005) Field trial of transgenic Indian mustard plants shows enhanced phytoremediation of selenium-contaminated sediment Environmental Science and Technology 39 1771 – 1777.

  • Accumulation of an organic anticancer selenium …

    Tolerance to high selenium (Se) soils in Se-hyperaccumulating plant species is correlated with the ability to biosynthesise methylselenocysteine (MeSeCys), due to the activity of selenocysteine methyltransferase (SMT). In mammals, inclusion of MeSeCys in the ...

  • Phytoremediation of selenium using transgenic plants

    Biotech Plants for Bioremediation | ISAAA

  • Phytoremediation of selenium using transgenic plants

     · Several transgenic approaches have been used successfully to further enhance plant selenium accumulation, tolerance, and volatilization: upregulation of genes involved in sulfur/selenium assimilation and volatilization, methylation of selenocysteine, and

  • Selenium Biofortification and Interaction With Other Elements in Plants…

    Other Elements in Plants: A Review. Front. Plant Sci. 11:586421. doi: 10.3389/fpls.2020.586421 Selenium Biofortification and ... (2017) showed, in transgenic tobacco lines, that the absorption of phosphate and Se accumulation in shoots is improved by over ...

  • Analysis of sulfur and selenium assimilation in Astragalus …

    Transgenic plants overexpressing the gene encoding the A. thaliana ATPS (ATPS1) were produced in this study, whereas transgenic A. thaliana expressing P. aeruginosa APR (PaAPR) and T. goesingense SAT (SAT‐m) were as reported previously (Freeman ; ).

  • Examples of Transgenic Plants | Biotechnology

    Plants can be engineered to increase the efficiency of selenium (Se) accumulation, which is then view to increasing rate of Se volatilization. The selenium is a major environmental pollutant. The oxidised form of Se namely selenate or selenite are highly soluble and are easily removed by plants whereas inorganic forms such as selenide or elemental Se are less bioavailable.

  • Transgenic mustard sucks up selenium | Nature

     · The transgenic plants showed up to 80% of the growth expected in uncontaminated soil, whereas the wild-type plants had their growth halved by the selenium.

  • Selenium in the Soil-Plant Environment: A Review :: …

     · Selenium deficiency has been associated with cancer and other health problems. Selenium requirements are commonly met through soils and plants such as wheat, rice, vegetables and maize in many countries. Selenium concentration in the soil generally ranges from 0.01-2.0 mg kg -1 but seleniferous soils usually contain more than 5 mg kg -1.

  • Selenium in higher plants: understanding mechanisms …

    Selenium (Se) is an essential micronutrient for many organisms, including plants, animals and humans. As plants are the main source of dietary Se, plant Se metabolism is therefore important for Se nutrition of humans and other animals. However, the concentration of Se in plant foods varies between areas, and too much Se can lead to toxicity. As we discuss here, plant Se uptake and metabolism ...

  • Field trial of transgenic Indian mustard plants shows …

    Three transgenic Indian mustard [Brassica juncea (L.) Czern.] lines were tested under field conditions for their ability to remove selenium (Se) from Se- and boron-contaminated saline sediment. The transgenic lines overexpressed genes encoding the enzymes

  • [PDF] Phytoremediation of selenium using transgenic …

    Selenium (Se) is a micronutrient for many organisms but also toxic at higher concentrations. Both selenium deficiency and toxicity are serious problems worldwide. Owing to the similarity of selenium to sulfur, plants readily take up and assimilate selenate via sulfur transporters and enzymes and can even volatilize selenium. Selenium accumulating or volatilizing plants may be used for ...

  • SELENIUM IN HIGHER PLANTS | Annual Review of Plant …

    Abstract Plants vary considerably in their physiological response to selenium (Se). Some plant species growing on seleniferous soils are Se tolerant and accumulate very high concentrations of Se (Se accumulators), but most plants are Se nonaccumulators and are Se-sensitive. This review summarizes knowledge of the physiology and biochemistry of both types of plants, particularly with regard to ...

  • Genetically modified crops

    Transgenic plants are used to express proteins, like the cry toxins from B. thuringiensis, herbicide-resistant genes, antibodies, and antigens for vaccinations. A study led by the European Food Safety Authority (EFSA) also found viral genes in transgenic plants.

  • Effects of Selenium on Plant Metabolism and Implications …

     · Selenium interactions with multiple metabolic pathways in plants have relevant implications for plants and consumers that feed on them. Managing such interactions are useful to biofortify crops with organic forms of Se endowed with beneficial properties (selenomethionine and methylselenocysteine) and in other nutraceuticals like glucosinolates and antioxidants.

  • Transgenic mustard sucks up selenium : Nature News

    Genetically modified Indian mustard plants have successfully cleaned up excessive selenium in a California field. This is the first field trial for a pollution-busting transgenic plant, and it ...

  • Selenium speciation in wild-type and genetically modified …

    Some plants have the ability not only to grow in the presence of potential environmental contaminants, such as Se, but also to accumulate them (Se accumulators). As such, some of these plant species are excellent candidates for Se phytoremediation. One of the accumulation mechanisms for selenium …

  • Selenium in Plants | SpringerLink

     · Selenium (Se) and sulfur (S) are chemically similar. Most plants cannot discriminate between the two, with the exception of Se hyperaccumulator species, which preferentially accumulate Se over S. Genetic engineering of various genes from the S/Se assimilation pathway has successfully enhanced plant Se tolerance, accumulation, and volatilization, in ...

  • Selenium in Plants | SpringerLink

     · Selenium (Se) and sulfur (S) are chemically similar. Most plants cannot discriminate between the two, with the exception of Se hyperaccumulator species, which preferentially accumulate Se over S. Genetic engineering of various genes from the S/Se assimilation pathway has successfully enhanced plant Se tolerance, accumulation, and volatilization ...

  • Transgenic Mustard Cleans Up Soils | Transgenic Mustard …

    The transgenic plants showed up to 80% of the growth expected in uncontaminated soil, whereas the wild-type plants had their growth halved by the selenium. They were harvested after 45 days in the field, but the researchers expect that longer growth periods could remove more selenium, and estimate that the most effective plants removed about 4.4% of the element in the top 25 centimetres of soil.

  • Scope for Applying Transgenic Plant Technology for …

     · A propitious approach for establishing an effective phytoremediation technology is the introduction of novel attributes into high biomass plants using transgenic accession. Transgenic plants involving expression of specific bacterial genes overcome the phytotoxic effects of Se.

  • Longdom Publishing SL | Open Access Journals

    Keywords: Plants; Selenium; Se enrichment genes; Cloning; Transgenic Introduction Selenium (Se) was firstly found by Swedish scientist Jakob Berzelius in 1917. In the 1930s, it is generally accepted that Se is toxic or carcinogenic to human, while in 1957

  • Transgenic mustard sucks up selenium | BioEd Online

    Plants in Space PowerPlay: Fitness and Physical Activity Resources and the Environment Rockets Scientific Decision-making Scientific Decision-making: Supplementary Activities on the Cardiovascular System Sensory System Sleep and Daily Rhythms

  • 5.2.5. Selenium

    Mikkelsen RL, Wan HF. 1990. The effect of selenium on sulfur uptake by barley and rice. Plant and Soil 121: 151–153. DOI: 10.1007/BF00013109. Pilon-Smits EA, LeDuc DL. 2009. Phytoremediation of selenium using transgenic plants. Current Opinion in

  • Enhanced Selenium Tolerance and Accumulation in …

     · The transgenic SL plants contained a protein that reacted with antiserum raised against the mouse SL enzyme (Fig. 2A), which was of the expected size (43 kD) and not present in wild-type plants. Therefore, it was concluded that the mouse SL protein is expressed in the transgenic plants…

  • 02.01.2005

     · Transgenic plants remove more selenium from contaminated soil than wild-type plants, new field tests show By Sarah Yang, Media Relations | 01 February 2005 BERKELEY – In the first field trial of plants genetically tweaked to absorb more contaminants, researchers found that the transgenic plants handily beat out their wild-type counterparts.

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