A5074121194- Selenium in Biological Systems
- Heavy metals in environment
- Plant Micronutrient Interactions and Effects
- Heavy Metal Exposure and Toxicity
- Coal and Its By-products
- Mercury impact and mitigation studies
- Heavy Metals in Plants
- Constructed Wetlands for Wastewater Treatment
- Plant Stress Responses and Tolerance
- Trace Elements in Health
- Aluminum toxicity and tolerance in plants and animals
- Moringa oleifera research and applications
- Kidney Stones and Urolithiasis Treatments
- Bioenergy crop production and management
- Coastal wetland ecosystem dynamics
- Plant Physiology and Cultivation Studies
- Growth and nutrition in plants
- Seedling growth and survival studies
- Astronomical and nuclear sciences
- Analytical chemistry methods development
- Phosphorus and nutrient management
- Arsenic contamination and mitigation
- Pharmaceutical and Antibiotic Environmental Impacts
- Irrigation Practices and Water Management
- Cassava research and cyanide
United States Department of Agriculture
2013-2024
Agricultural Research Service
2015-2024
San Joaquin Valley Agricultural Sciences Center
2015-2024
California State University, Fresno
1995-2018
University of Saskatchewan
2010
University of California, Davis
1997-2010
Colorado State University
2005-2010
Lawrence Berkeley National Laboratory
2010
Beltsville Human Nutrition Research Center
2008
Grand Forks Human Nutrition Research Center
2008
Trace elements (TEs) occur at low concentrations (<1000 mg kg −1) in organisms, yet they have a large biological effect, both as essential nutrients and environmental contaminants. Phytomanagement describes the manipulation of soil-plant systems to affect fluxes TEs environment with goal remediating contaminated soils, recovering valuable metals, or increasing micronutrient crops. includes all biological, chemical, physical technologies employed on vegetated site. Successful phytomanagement...
Selenium (Se) is an essential trace element for humans and animals but at high concentrations, Se becomes toxic to organisms due replacing sulfur in proteins. biofortification agricultural process that increases the accumulation of crops, through plant breeding, genetic engineering, or use fertilizers. While phytoremediation a green biotechnology clean up Se-contaminated environments, primarily phytoextraction phytovolatilization. By integrating technologies, Se-enriched materials harvested...
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 overexpressed genes encoding the enzymes adenosine triphosphate sulfurylase (APS), γ-glutamyl-cysteine synthetase (ECS), glutathione (GS), respectively. APS, ECS, GS plants accumulated 4.3, 2.8, 2.3-fold more Se in leaves than wild type, respectively (P < 0.05). significantly tolerated...
Concentrations of selenium (Se) in agricultural irrigation effluent increased stored soil Se to toxic levels the wetland sediment at Kesterson Reservoir. Vegetation management (phytoremediation) may be a strategy reduce these concentrations nontoxic levels. Selenium plant shoots and depletion removal by selected species were evaluated over 1-yr period under greenhouse conditions. Two soils used: seleniferous Turlock (collected from Reservoir) that contained high total (∼40 mg kg−1 soil),...
Abstract High concentrations of Se found in the environment may be detrimental to sustainable agriculture parts western USA. Greenhouse pot experiments were conducted study different plant species grown soil with added Se. Astragalus incanus L. (no common name), creeping saltbush ( Atriplex semibaccata R. Br. L.), Old Man nummularia Lindl wild brown mustard Brassica juncea Czern and tall fescue grass Festuca arundinacea Schreb L.) potting which 3.5 mg 6+ or 4+ kg −1 was either as Na 2 SeO 4...
Broccoli is a food often consumed for its potential health-promoting properties. The health benefits of broccoli are partly associated with secondary plant compounds that have bioactivity; glucosinolates and phenolic acids two the most abundant important in broccoli. In an effort to determine how variety, stress, production conditions affect these bioactive components was grown greenhouse without selenium (Se) fertilization, field under conventional or organic farming procedures water...
Understanding the bioavailability of selenium (Se) in soil–plant system plays a vital role phytoremediation and agronomic biofortification strategies. This review aimed to (a) discuss effect various soil parameters on Se, its uptake translocation relation plant species, genotypes, growth stages, management regimes; (b) examine indices associated with Se bioavailability. In addition, we particularly discussed potential methods for regulating Se. Such include application agricultural residue,...
• Selenium (Se) hyperaccumulation has a profound effect on plant–arthropod interactions. Here, we investigated floral Se distribution and speciation in flowers the effects of pollen quality plant–pollinator Floral were compared Stanleya pinnata, an hyperaccumulator, Brassica juncea, comparable nonhyperaccumulator. Pollen germination was measured from plants grown with varying concentrations visitation between high low Se. pinnata preferentially allocated to flowers, as nontoxic...
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 total Se measured using Hydride Generation-Atomic Fluorescence Spectrometry (HG-AFS) speciation determined liquid chromatography/UV irradiation-hydride generation-atomic fluorescence spectrometry (LC-UV-HG-AFS). The results showed that C. could accumulate to 239±201 mg/kg...
The present study investigated the beneficial role of selenium (Se) in protecting oilseed rape (Brassica napus L.) plants from cadmium (Cd+2) and lead (Pb+2) toxicity. Exogenous Se markedly reduced Cd Pb concentration both roots shoots. Supplementation medium with (5, 10 15 mg kg-1) alleviated negative effect on growth led to a decrease oxidative damages caused by Pb. Furthermore, enhanced superoxide free radicals (O2-), hydrogen peroxide (H2O2) lipid peroxidation, as indicated...
The inhibition of salt stress on plant and microbial functions has led to the reduction nitrogen removal capacity constructed wetlands (CWs) under saline conditions. mechanisms effectiveness bioaugmented CW (Bio-CW) microcosms with a salt-tolerant inoculum were evaluated for at different salinity levels. results showed that denitrification CWs was improved conditions by adding inoculum. At an EC 15 mS/cm, percentages ammonia (NH4+-N) total (TN) in Bio-CW (95.7% 99.4%) Day 5 significantly (p...
Two new transgenic Indian mustard [Brassica juncea (L.) Czern.] lines were tested under field conditions for their ability to accumulate selenium (Se) from Se- and boron-contaminated saline sediment. The overexpress genes encoding the enzymes selenocysteine lyase (cpSL) methyltransferase (SMT), respectively. In first Spring planting, cpSL, SMT, wildtype plants (WT) compared, while SMT WT compared in a second, Fall planting. shoots of cpSL accumulated 2-fold more Se (p < 0.01), had 1.8 times...
Enshi is a high selenium (Se) region in Hubei, China, where human selenosis was observed between 1958 and 1963. This study investigated the daily dietary Se intake of residents Shadi, town located 72 km northeast City, to assess risk area. Foods consumed typically by local their hair samples were analyzed for total concentration. Concentrations different diet categories as follows: cereals: 0.96 ± 0.90 mg kg(-1) DW rice 0.43 0.55 corn; tuber: 0.28 0.56 potato 0.36 0.12 sweet potato;...