Accumulation, mobilization, and transformation of selenium in rice grain provided with foliar sodium selenite

2019 ◽  
Vol 99 (6) ◽  
pp. 2892-2900 ◽  
Author(s):  
Muhammad Umer Farooq ◽  
Zhichen Tang ◽  
Rui Zeng ◽  
Yuanke Liang ◽  
Yujie Zhang ◽  
...  
Keyword(s):  
Sodium Selenite ◽  
Rice Grain

scholarly journals Effect of Rice Grain (Oryza sativa L.) Enrichment with Selenium on Foliar Leaf Gas Exchanges and Accumulation of Nutrients

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 288
Author(s):  
Ana Coelho Marques ◽  
Fernando C. Lidon ◽  
Ana Rita F. Coelho ◽  
Cláudia Campos Pessoa ◽  
Inês Carmo Luís ◽  
...  
Keyword(s):  
Sodium Selenite ◽  
Oryza Sativa L ◽  
Fold Increase ◽  
Physiological Data ◽  
Sodium Selenate ◽  
Rice Grain ◽  
Rice Cultivars ◽  
Gas Exchanges ◽  
Toxicity Threshold ◽  
Leaf Gas Exchanges

An agronomic itinerary for Se biofortification of two rice cultivars (Ariete and Ceres) through foliar fertilization with sodium selenate and sodium selenite with different concentrations (25, 50, 75 and 100 g Se.ha−1), was implemented in experimental fields. The selenium toxicity threshold was not exceeded, as shown by the eco-physiological data obtained through leaf gas exchanges. The highest Se enrichment in paddy grains was obtained with selenite for both cultivars, especially at the highest doses, i.e., 75 and 100 g Se.ha−1, with approximately a 5.0-fold increase compared with control values. In paddy grains, Zn was the most affected element by the treatments with Se with decreases up to 54%. When comparing the losses between rough and polished grains regardless of the cultivars, Se species and concentrations, it was observed that only Cu, Mg and Zn exhibited losses <50%. The remaining elements generally had losses >70%. The loss of Se is more pronounced in Ceres cultivar than in Ariete but rarely exceeds 50%. The analysis by µ-EDXRF showed that, in Ariete cultivar, Se is mostly homogeneously distributed in the grain regardless of any treatments, while in Ceres cultivar, the Se distribution seems to favor accumulation in the periphery, perhaps in the bran.

scholarly journals ACCUMULATION, MOBILIZATION, AND TRANSFORMATION OF SELENIUM IN RICE GRAIN PROVIDED WITH FOLIAR SODIUM SELENITE

RICE GROWING ◽  
2020 ◽  
Vol 48 (3) ◽  
pp. 51-61
Author(s):  
M.U. Farooq ◽  
◽  
Zhichen Tang ◽  
RuI Zeng ◽  
Yuanke Liang ◽  
...  
Keyword(s):  
Sodium Selenite ◽  
Rice Grain

scholarly journals Selenium biofortification of rice and radish: effect of soil texture and efficiency of two extractants

2014 ◽  
Vol 60 (No. 3) ◽  
pp. 105-110 ◽  
Author(s):  
Fernandes KFM ◽  
Berton RS ◽  
Coscione AR
Keyword(s):  
Human Health ◽  
Sandy Soil ◽  
Soil Texture ◽  
Sodium Selenite ◽  
Clay Soil ◽  
Essential Elements ◽  
Rice Grain ◽  
Mineral Fertilization ◽  
Promising Strategy ◽  
Edible Parts

The addition of essential elements to human health by mineral fertilization is considered a promising strategy for biofortification. A greenhouse experiment was carried out where amounts equivalent to 0.0; 0.5; 1.0 and 2.0 kg/ha&nbsp;of selenium (Se), as sodium selenite, were added to two soils with contrasting textures to evaluate the increase in Se concentration on the edible parts of rice (grain) and radish (roots) plants. Two extractors (KCl and KH<sub>2</sub>PO<sub>4</sub>) were also evaluated in their efficiency in predicting available Se to the two species. Total Se concentration in plants increased significantly with the amounts of Se added to both soils showing that selenite can be used for biofortification of these crops. Selenium availability was higher on sandy soil than on sandy clay soil. Se extraction with KCl presented better performance than KH<sub>2</sub>PO<sub>4</sub> in predicting Se phytoavailability for rice and radish.

Synthesis of ZnO/ZnFe2O4 nanocomposites in organic-free media and their photocatalytic activity under natural sunlight

2020 ◽  
Vol 14 (2) ◽  
pp. 6801-6810
Author(s):  
Rahmayeni Rahmayeni ◽  
Zulhadjri Zulhadjri ◽  
Yeni Stiadi ◽  
Agusnar Harry ◽  
Syukri Arief
Keyword(s):  
Electron Microscopy ◽  
Hexagonal Wurtzite Structure ◽  
Rice Grain ◽  
X Ray Diffraction ◽  
Homogeneous Sphere ◽  
Natural Sunlight ◽  
Transmission Electron ◽  
Photocatalytic Activities ◽  
Free Media ◽  
Photocatalytic Applications

Nanocomposite ZnO/ZnFe2O4 photocatalysts with different proportions of ZnFe2O4 were synthesized in organic-free media using metal nitric as precursors. The ZnO phase with hexagonal wurtzite structure and low crystallinity of ZnFe2O4 was confirmed using XRD (X-Ray diffraction). Different morphologies of the nanocomposites were obtained ranging from rice grain-like with a porous surface to homogeneous sphere-like nanoparticles as shown in Scanning Electron Microscopy (SEM) and TEM Transmission Electron Microscopy (TEM) studies. Magnetic properties measured by Visible Sampler Magnetometer (VSM) showed diamagnetic and paramagnetic behavior for the nanocomposites. Analysis with Diffuse Reflectance Spectrophotometer (DRS) UV-vis showed an increase the composition of ferrite in composites increasing its ability to absorb visible light. Photocatalytic activities of ZnO/ZnFe2O4 nanocomposites on the degradation of Rhodamine B dye reached 95.6% after 3 h under natural sunlight suggesting their suitability for sunlight driven photocatalytic applications. 

Impact of Sodium Selenite on Antioxidative Metabolism in Kidney Tissue of Albino Rat Under Ammonia Stress

2012 ◽  
Vol 3 (1) ◽  
pp. 489-490
Author(s):  
M. SIVA SANKAR M. SIVA SANKAR ◽  
◽  
K. SUJATHA K. SUJATHA ◽  
P. NEERAJA P. NEERAJA
Keyword(s):  
Sodium Selenite ◽  
Kidney Tissue ◽  
Albino Rat ◽  
Antioxidative Metabolism ◽  
Ammonia Stress

Photosynthetic activity of spring wheat depending on the conditions of water supply

2020 ◽  
Author(s):  
I.I. Seregina ◽  
◽  
I.G. Makarskaya
Keyword(s):  
Water Supply ◽  
Spring Wheat ◽  
Sodium Selenite ◽  
Photosynthetic Activity ◽  
Wheat Variety ◽  
Sharp Decrease ◽  
Soil Culture ◽  
Growing Conditions ◽  
Spring Wheat Variety ◽  
Excessive Water

Abstract:In model experiments in soil culture, the effect of different methods of treatment with sodium selenite on the photosynthetic activity of spring wheat variety Zlata was studied under extreme growing conditions. Under drought conditions, the inhibition of the growth of the photosynthetic surface of spring wheat plants was revealed. Under conditions of excessive water supply, a sharp decrease in the area of the assimilating surface of wheat plants was observed. The positive effect of sodium selenite solution on the photosynthetic activity of spring wheat plants was established with insufficient and excessive water supply to wheat plants.

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