plants selenium transgenic.
Selenium (Se) is a trace element indispensable for humans, animals and some microorganisms. For plants its essentiality has not yet been established, despite its responsibility for a number of ...
The paper collected relevant literatures on selenium and explored the function to plant, selenium content, influential factors and selenium specification and transformation. We believed that there should be more deep research on function of selenium to plant. Approaches of molecular, genetic engineering and isotope could be employed to breed selenium rich crops and possibilities in practice.
The transgenic SL plants contained a protein that reacted with antiserum raised against the mouse SL enzyme (Fig. (Fig.2A), 2 A), 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 ...
Box 2. Transgenic approach. Selenium metabolism inside the plants can be manipulated using transgenic approach for effective Se-phytoremediation or biofortification. Prime focus should be to: • Increase plant tolerance of high soil Se concentration. • Increase Se uptake and transport to shoot. • Increase Se accumulation in shoot tissues.
Plant samples of Cardamine hupingshanesis (Brassicaceae), Ligulariafischeri (Ledeb.) turcz (Steraceae) and their underlying top sediments were collected from selenium (Se) mine drainage areas in Enshi, China. Concentrations of total Se were measured using Hydride Generation-Atomic Fluorescence Spectrometry (HG-AFS) and Se speciation were determined using liquid chromatography/UV …
Feb 09, 2005· University Of California, Berkeley. (2005, February 9). Transgenic Plants Remove More Selenium From Contaminated Soil Than Wild-type Plants, New Field Tests Show. ScienceDaily. Retrieved March 30 ...
First field results prove plant can remove soil contaminants. First field results prove plant can remove soil contaminants. ... Transgenic mustard sucks up selenium. Mark Peplow ...
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 conversion of selenocysteine to elemental Se.
their ability to accumulate selenium (Se) from Se- and boron-contaminated saline sediment. The transgenic lines overexpress genes encoding the enzymes selenocysteine lyase (cpSL) and selenocysteine methyltransferase (SMT), respectively. In the first Spring planting, cpSL, SMT, and wildtype plants (WT) were compared, while SMT and WT were ...
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 diet reduces the incidence of certain cancers, so increasing the range of crop plants that can produce this compound is an attractive ...
UC Berkeley Press Release. 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.
Several transgenic approaches have been used successfully to further enhance plant selenium accumulation, tolerance, and volatilization: upregulation of genes involved in sulfur/selenium ...
The transgenic plants remained healthy; the wild‐type plants grown in the selenium‐contaminated soil had 50% less mass than in clean soil, while the GS transgenics had only a 20% reduction. Unfortunately, the US Department of Agriculture Animal and Plant Health Inspection Service (USDA‐APHIS) allowed this field trial to be conducted for ...
University Of California, Berkeley. (2005, February 9). Transgenic Plants Remove More Selenium From Contaminated Soil Than Wild-type Plants, New Field Tests Show. ScienceDaily…
Transgenic plants remove more selenium from polluted soil than wild plants, new tests show ... inspects the leaves of a transgenic Indian mustard plant used to remove selenium …
9 Selenium Metabolism in Plants: Molecular Approaches Özgür Çak õr1, Neslihan Turgut-Kara 1* and û ule Ar õ1,2 1Department of Molecular Biology and Genetics, Faculty of Science Istanbul University, Istanbul 2Research and Application Center for Biotechnology and Genetic Engineering, Istanbul Turkey 1.
ADVERTISEMENTS: In this article we will discuss about the examples of transgenic plants for phytoremediation. 1. Phytoremediation of Mercury: There have been reports on the ability of certain plant species which have ability to accumulate mercury both from atmospheric and soil sources. However, plant species never ventured hyper accumulation of mercury, researcher use engineered plants […]
Selenium (Se) is a metalloid naturally occurring predominantly in deposits of sedimentary rocks in drier zones of the biosphere. Se forms complexes with metals and nonmetals thus producing both inorganic and organic compounds (Frankenberger and Engberg, 1998).In a natural environment, Se possesses four valence states, namely, selenate (6+), selenite (4+), elemental Se (0), and selenide (2−) ().
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 adenosine triphosphate sulfurylase (APS), γ-glutamyl-cysteine synthetase (ECS), and glutathione synthetase (GS), respectively.
This study investigated selenium uptake and transport from the soil to 12 plant species in the mining area of Gumuskoy (Kutahya), Turkey. Plant samples and their associated soils were collected and analyzed for Se content by ICP-MS. Mean Se values in the soils, roots, and shoots of all plants were 0.9, 0.6, and 0.8 mg kg−1, respectively.
Aug 29, 2012· Transgenic maize plants expressing phytase may well be the first second-generation GE crop to reach the market (Chen et al. 2008). Cassava is an important staple crop in sub-Saharan Africa but the high content of the cyanogenic glycosides linamarin and lotaustralin means it must be processed before consumption (Jørgensen et al. 2005 ).
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 controls.
Transgenic Plants: Benefits, Applications, and Potential Risks in Phytoremediation Chapter (PDF Available) · January 2019 with 978 Reads How we measure 'reads'
Mar 01, 2003· Selenium (Se) toxicity is thought to be due to nonspecific incorporation of selenocysteine (Se-Cys) into proteins, replacing Cys. In an attempt to direct Se flow away from incorporation into proteins, a mouse ( Mus musculus ) Se-Cys lyase (SL) was expressed in the cytosol or chloroplasts of Arabidopsis. This enzyme specifically catalyzes the decomposition of Se-Cys into elemental Se and …
Available online at Phytoremediation of selenium using transgenic plants Elizabeth AH Pilon-Smits1 and Danika L LeDuc2 Selenium (Se) is …
Indian mustard (Brassica juncea) plants overexpressing ATP sulfurylase (APS transgenics) were previously shown to have higher shoot selenium (Se) levels and enhanced Se tolerance compared to wild type when supplied with selenate in a hydroponic system.Other transgenic Indian mustard overexpressing cystathionine-γ-synthase (CGS) showed a higher Se volatilization rate, lower shoot Se …
Zeba Usmani, ... Majeti Narasimha Vara Prasad, in Transgenic Plant Technology for Remediation of Toxic Metals and Metalloids, 2019. Abstract. Selenium (Se) is an essential micronutrient for several organisms but at elevated levels, it becomes toxic. Se toxicity is of vital concern worldwide due to its substantial similarity to sulfur (S), which readily leads to uptake and assimilation of Se by ...
Feb 11, 2005· 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 ...
Conclusion. These results demonstrate the feasibility of developing transgenic plant-based production of Se-methylselenocysteine, as well as bioengineering selenite resistance in plants.Selenite resistance is the first step in engineering plants that are resistant to selenate, the predominant form of …
Transgenic plants have also been used for bioremediation of contaminated soils. Mercury, selenium and organic pollutants, like as polychlorinated biphenyls (PCBs), have been removed from soils by transgenic plants, containing genes for bacterial enzymes. 6. 3. Types. Transgenic plants have genes inserted into them, deriving from other species.
Specifically, we developed transgenic plants with a superior capacity for the phytoremediation of selenium and/or heavy metals by over expressing the enzymes ATP sulfurylase (APS), g-glutamyl cysteine synthetase (ECS), or glutathione synthetase (GS).
The new research findings, published today (Tuesday, Feb. 1) in the journal Environmental Science and Technology, show that three transgenic lines of the Indian mustard plant, Brassica juncea, absorbed two to four times more selenium from contaminated soil than the genetically unaltered, wild-type plants.
The effects of selenocysteine se-methyltransferase on selenium metabolism in transgenic broccoli [abstract]. American Society of Plant Biologists Annual Meeting. p. 226. OR ENCODES A CYSTEINE-RICH ZINC FINGER DOMAIN CONTAINING PROTEIN IN REGULATING HIGH-LEVEL OF BETA-CAROTENE ACCUMULATION IN CAULIFLOWER -(Abstract Only)
Jan 28, 2004· These results demonstrate the feasibility of developing transgenic plant-based production of Se-methylselenocysteine, as well as bioengineering selenite resistance in plants. Selenite resistance is the first step in engineering plants that are resistant to selenate, the predominant form of Se in the environment.
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