Comparative evaluation of selenium accumulation by allium species after foliar application of selenium nanoparticles, sodium selenite and sodium selenate

2012 ◽  
Vol 444 (1) ◽  
pp. 176-179 ◽  
Author(s):  
N. A. Golubkina ◽  
G. E. Folmanis ◽  
I. G. Tananaev
Keyword(s):  
Comparative Evaluation ◽  
Sodium Selenite ◽  
Foliar Application ◽  
Selenium Nanoparticles ◽  
Sodium Selenate ◽  
Allium Species ◽  
Selenium Accumulation

scholarly journals Comparative efficacy of selenate and selenium nanoparticles for improving growth, productivity, fruit quality, and postharvest longevity through modifying nutrition, metabolism, and gene expression in tomato; potential benefits and risk assessment

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0244207
Author(s):  
Maryam Neysanian ◽  
Alireza Iranbakhsh ◽  
Rahim Ahmadvand ◽  
Zahra Oraghi Ardebili ◽  
Mostafa Ebadi
Keyword(s):  
Fruit Quality ◽  
Foliar Application ◽  
Membrane Integrity ◽  
Pollen Grains ◽  
Fruit Production ◽  
Selenium Nanoparticles ◽  
Sodium Selenate ◽  
Enzymatic Antioxidants ◽  
Protein Thiols ◽  
Postharvest Longevity

This study attempted to address molecular, developmental, and physiological responses of tomato plants to foliar applications of selenium nanoparticles (nSe) at 0, 3, and 10 mgl-1 or corresponding doses of sodium selenate (BSe). The BSe/nSe treatment at 3 mgl-1 increased shoot and root biomass, while at 10 mgl-1 moderately reduced biomass accumulation. Foliar application of BSe/nSe, especially the latter, at the lower dose enhanced fruit production, and postharvest longevity, while at the higher dose induced moderate toxicity and restricted fruit production. In leaves, the BSe/nSe treatments transcriptionally upregulated miR172 (mean = 3.5-folds). The Se treatments stimulated the expression of the bZIP transcription factor (mean = 9.7-folds). Carotene isomerase (CRTISO) gene was transcriptionally induced in both leaves and fruits of the nSe-treated seedlings by an average of 5.5 folds. Both BSe or nSe at the higher concentration increased proline concentrations, H2O2 accumulation, and lipid peroxidation levels, suggesting oxidative stress and impaired membrane integrity. Both BSe or nSe treatments also led to the induction of enzymatic antioxidants (catalase and peroxidase), an increase in concentrations of ascorbate, non-protein thiols, and soluble phenols, as well as a rise in the activity of phenylalanine ammonia-lyase enzyme. Supplementation at 3 mgl-1 improved the concentration of mineral nutrients (Mg, Fe, and Zn) in fruits. The bioaccumulated Se contents in the nSe-treated plants were much higher than the corresponding concentration of selenate, implying a higher efficacy of the nanoform towards biofortification programs. Se at 10 mgl-1, especially in selenate form, reduced both size and density of pollen grains, indicating its potential toxicity at the higher doses. This study provides novel molecular and physiological insights into the nSe efficacy for improving plant productivity, fruit quality, and fruit post-harvest longevity.

scholarly journals Selenium Biofortification of Wheat as a Strategy to Improve Human Nutrition

Agriculture ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 144
Author(s):  
Aleksandra Radawiec ◽  
Wiesław Szulc ◽  
Beata Rutkowska
Keyword(s):  
Spring Wheat ◽  
Foliar Application ◽  
Stem Elongation ◽  
Sodium Selenate ◽  
Control Group ◽  
Selenium Content ◽  
Wheat Grain ◽  
Elongation Phase ◽  
Fertilisation Treatment ◽  
Foliar Fertilisation

This paper analyses the effects of soil and foliar fertilization with sodium selenate (VI) on the selenium content in spring wheat grain. The research was carried out at the Departmental Experimental Station of the Institute of Agriculture WULS in Skierniewice in 2018 and 2019. The dose of selenium used was 5.00 g Se·ha−1 in various development stages of spring wheat. The results showed that selenium fertilisation did not affect the size of the grain yield, but both soil and foliar fertilisation significantly increased the content of selenium in wheat grain compared to the control group. The highest Se content was obtained with the method of soil fertilisation combined with the foliar application with a total dose of 10.00 g·ha-1 Se in the stem elongation phase (S + F2), and in the tillering and stem elongation phase (S + F1 + F2), which resulted in the values of 0.615 and 0.719 mg·kg−1 Se in grain, respectively. On this basis, it was concluded that the best time to carry out foliar fertilisation treatment is in the stem elongation phase (BBCH 30–39). The results show that the greatest increase in selenium content in the grain is achieved with soil and foliar fertilisation combined.

Increase of selenium concentration in wheat grains through foliar application of sodium selenate

2021 ◽  
Vol 99 ◽  
pp. 103886
Author(s):  
Douglas Delaqua ◽  
Ruan Carnier ◽  
Ronaldo Severiano Berton ◽  
Fabiana Cristina Andrade Corbi ◽  
Aline Renée Coscione
Keyword(s):  
Foliar Application ◽  
Selenium Concentration ◽  
Sodium Selenate ◽  
Wheat Grains

scholarly journals Foliar application of sodium selenate induces regulation in yield formation, grain quality characters and 2-acetyl-1-pyrroline biosynthesis in fragrant rice

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Haowen Luo ◽  
Bin Du ◽  
Longxin He ◽  
Axiang Zheng ◽  
Shenggang Pan ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Grain Yield ◽  
Grain Quality ◽  
Foliar Application ◽  
Higher Plants ◽  
Sodium Selenate ◽  
Rice Varieties ◽  
Fragrant Rice ◽  
The Stability ◽  
Heading Stage

Abstract Background Selenium (Se) is a beneficial element for higher plants and essential for mammals. To study the effect of the foliar application of sodium selenate on fragrant rice performance, a pot experiment was conducted in Guangdong, China. At the initial heading stage, one-time foliar application of sodium selenate with concentrations of 0, 10, 20, 30, 40 and 50 μmol·L− 1 (named CK, Se1, Se2, Se3, Se4 and Se5, respectively) were foliar applied on two fragrant rice varieties, ‘Meixiangzhan-2’ and ‘Xiangyaxiangzhan’. Results Selenate application at the initial heading stage not only improved the grain yield of fragrant rice by increasing the seed-setting rate and grain weight, but also promoted the grain quality by increasing crude protein contents and lowering the chalky rice rate. Furthermore, Se applications enhanced the biosynthesis of 2-acetyl-1- pyrroline (2-AP), the main aromatic compound, by increasing the contents of precursors (△1- pyrroline, proline and pyrroline-5-carboxylic acid (P5C)) and the activities of enzymes (proline dehydrogenase (PRODH), △1-pyrroline-5-carboxylic acid synthetase (P5CS), and ornithine aminotransferase (OAT)) in fragrant rice. The results also showed that foliar application of sodium selenate enhanced the antioxidant system of both varieties by promoting the activities of peroxidase (POD), superoxide dismutase (SOD), catalase (CAT) and reducing the contents of malondialdehyde (MDA). Furthermore, the real-time PCR analyses depicted that foliar application of selenate up-regulated the GPX1, GPX4 and CATC transcripts. The higher antioxidative enzymatic activities might strength the stress resistant to ensure the stability of yield in fragrant rice form abiotic stress. Conclusions Foliar applications of sodium selenate at the initial heading stage increased the grain 2-AP content by enhancing the biosynthesis-related enzymes and precursors. The grain yield and quality of fragrant rice also increased due to selenate application. Furthermore, foliar application of selenate promoted the activities of enzymes such as POD, SOD and CAT and up-regulated the expression of gene GPX4, GPX1 and CATC.

scholarly journals The defensive benefit and flower number cost of selenium accumulation in Brassica juncea

AoB Plants ◽  
2019 ◽  
Vol 11 (5) ◽  
Author(s):  
Janet C Steven ◽  
Alexander Culver
Keyword(s):  
Brassica Juncea ◽  
Pieris Rapae ◽  
Leaf Tissue ◽  
Plant Size ◽  
Sodium Selenate ◽  
Negative Effects ◽  
Flower Number ◽  
Specialist Herbivore ◽  
Selenium Accumulation ◽  
The Cost

Abstract Some plant species accumulate selenium in their tissues in quantities far above soil concentrations, and experiments demonstrate that selenium can serve as a defence against herbivores and pathogens. However, selenium may also cause oxidative stress and reduce growth in plants. We measured growth, selenium accumulation and herbivory in four varieties of the selenium accumulator Brassica juncea to investigate the cost of accumulation as well as its benefit in reducing herbivory. We measured selenium levels, plant size and flower number in four varieties of B. juncea watered with sodium selenate or treated as controls. We also conducted no-choice herbivory trials on leaves from both treatments with the specialist herbivore Pieris rapae. The selenate treatment slightly increased leaf number over the control, but tissue concentrations of selenium and flower number were negatively correlated in some varieties. In herbivory trials, leaves from the plants in the selenate treatment lost less leaf tissue, and the majority of larvae given leaves from selenate-treated plants ate very little leaf tissue at all. In the variety with the highest selenium accumulation, leaves from selenate-treated plants that showed reduced flower production also experienced less herbivory in feeding trials. The protective advantage of greater selenium accumulation may be offset by negative effects on reproduction, and the relatively low level of selenium accumulation in this species as compared to more extreme hyperaccumulators could reflect the minimum level necessary to enhance protection from herbivory.

Protective effects of sodium selenite and selenium nanoparticles against experimental colon carcinogenesis in mice

2016 ◽  
Vol 40 (3) ◽  
pp. 101-108 ◽  
Author(s):  
Do-Youn Jang ◽  
◽  
Sung-June Kim ◽  
Jae-Hwang Jeong ◽  
Sang Yoon Nam ◽  
...  
Keyword(s):  
Sodium Selenite ◽  
Colon Carcinogenesis ◽  
Selenium Nanoparticles ◽  
Protective Effects

SELENIUM ACCUMULATION IN THE OOCYTE AFTER EXPOSURE TO SODIUM SELENITE

2009 ◽  
Vol 59 ◽  
pp. 139-141
Author(s):  
O. Thorlacius-Ussing ◽  
J. Rungby ◽  
B. Møller-Madsen ◽  
G. Danscher
Keyword(s):  
Sodium Selenite ◽  
Selenium Accumulation

scholarly journals Freshwater Bacteria Can Methylate Selenium through the Thiopurine Methyltransferase Pathway

2003 ◽  
Vol 69 (7) ◽  
pp. 3784-3790 ◽  
Author(s):  
Lionel Ranjard ◽  
Sylvie Nazaret ◽  
Benoit Cournoyer
Keyword(s):  
Pseudomonas Syringae ◽  
Sodium Selenite ◽  
Blot Hybridization ◽  
Sodium Selenate ◽  
Thiopurine Methyltransferase ◽  
Freshwater Environment ◽  
Reading Frame ◽  
Dna Library ◽  
Freshwater Bacteria ◽  
Genomic Dna Library

ABSTRACT Involvement of the bacterial thiopurine methyltransferase (bTPMT) in natural selenium methylation by freshwater was investigated. A freshwater environment that had no known selenium contamination but exhibited reproducible emission of dimethyl selenide (DMSe) or dimethyl diselenide (DMDSe) when it was supplemented with an organic form of selenium [(methyl)selenocysteine] or an inorganic form of selenium (sodium selenite) was used. The distribution of the bTPMT gene (tpm) in the microflora was studied. Freshwater bacteria growing on 10 μM sodium selenite and 10 μM sodium selenate were isolated, and 4.5 and 10% of the strains, respectively, were shown by colony blot hybridization to hybridize with a Pseudomonas syringae tpm DNA probe. Ribotyping showed that these strains are closely related. The complete rrs sequence of one of the strains, designated Hsa.28, was obtained and analyzed. Its closest phyletic neighbor was found to be the Pseudomonas anguilliseptica rrs sequence. The Hsa.28 strain grown with sodium selenite or (methyl)selenocysteine produced significant amounts of DMSe and DMDSe. The Hsa.28 tpm gene was isolated by genomic DNA library screening and sequencing. BLASTP comparisons of the deduced Hsa.28 bTPMT sequence with P. syringae, Pseudomonas aeruginosa, Vibrio cholerae, rat, and human thiopurine methyltransferase sequences revealed that the levels of similarity were 52 to 71%. PCR-generated Escherichia coli subclones containing the Hsa.28 tpm open reading frame were constructed. E. coli cells harboring the constructs and grown with sodium selenite or (methyl)selenocysteine produced significant levels of DMSe and DMDSe, confirming that the gene plays a role in selenium methylation. The effect of strain Hsa.28 population levels on freshwater DMSe and DMDSe emission was investigated. An increase in the size of the Hsa.28 population was found to enhance significantly the emission of methyl selenides by freshwater samples supplemented with sodium selenite or (methyl)selenocysteine. These data suggest that bTPMT can play a role in natural freshwater selenium methylation processes.

scholarly journals Radiolytic Synthesis and Characterization of Selenium Nanoparticles: Comparative Biosafety Evaluation with Selenite and Ionizing Radiation

2021 ◽  
Author(s):  
Alline Gomes Pereira ◽  
Luanai Graziele Luquini Gerolis ◽  
Letícia Satler Gonçalves ◽  
Luciana Mara Costa Moreira ◽  
Pedro Lana Gastelois ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Ionizing Radiation ◽  
Radiation Exposure ◽  
Sodium Selenite ◽  
Structural Parameters ◽  
Reactive Oxygen Species Generation ◽  
Protein Carbonylation ◽  
Selenium Nanoparticles ◽  
Spherical Particles ◽  
Water Radiolysis

Abstract Selenium nanoparticles (SeNPs) were synthesized by irradiating a solution containing sodium selenite (Se+4) as the precursor in YPG liquid medium with gamma-rays. Spherical particles were formed after reactions of sodium selenite with hydrated electrons (eaq-) and hydrogen radicals (H•) produced following water radiolysis. No hazardous reducing agents were employed. The obtained nanoparticles were morphologically characterized, and their physicochemical and structural parameters were analyzed. SeNPs characterization showed all selenium in the Se0 state. We incubated Saccharomyces cerevisiae cells with the SeNPs for 24 h and then challenged the cells with ionizing radiation. After radiation exposure, cells were assessed for cell viability, lipid peroxidation, protein carbonylation, free radical generation, and total sulfhydryl content. The synthesized SeNPs were considered safe and less toxic at the concentration employed than the same selenite concentration. Except for the protein carbonylation results, there were no other significant modifications in viability or the oxidative stress parameters in SeNP-treated cells. It was concluded that 1 mM of the synthesized SeNPs does not trigger oxidative stress. Furthermore, we verified that SeNPs attenuate the reactive oxygen species generation after in vitro ionizing radiation exposure. These observations open up tremendous possibilities for radiosensitizer development.

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