Selenium accumulation and metabolism in algae

Schiavon, Michela; Ertani, Andrea; Parrasia, Sofia; Vecchia, Francesca Dalla

doi:10.1016/j.aquatox.2017.05.011

Cited by 110 publications

(53 citation statements)

References 100 publications

(178 reference statements)

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“…The presence of selenium in aqueous solutions modulated changes in yeast cell metabolism. After it is accumulated by yeast, selenium can undergo reducing sulfur assimilation and transform into selenide, which is then used as a substrate for the synthesis of selenium amino acids, including SeMet [ 2 , 45 , 46 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Selenium on Lipid and Amino Acid Metabolism in Yeast Cells

Kieliszek

Błażejak

Bzducha-Wróbel

et al. 2018

Biol Trace Elem Res

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This article discusses the effect of selenium in aqueous solutions on aspects of lipid and amino acid metabolism in the cell biomass of Saccharomyces cerevisiae MYA-2200 and Candida utilis ATCC 9950 yeasts. The yeast biomass was obtained by using waste products (potato wastewater and glycerol). Selenium, at a dose of 20 mg/L of aqueous solution, affected the differentiation of cellular morphology. Yeast enriched with selenium was characterized by a large functional diversity in terms of protein and amino acid content. The protein content in the biomass of S. cerevisiae enriched with selenium (42.6%) decreased slightly as compared to that in the control sample without additional selenium supplementation (48.4%). Moreover, yeasts of both strains enriched with selenium contained a large amount of glutamic acid, aspartic acid, lysine, and leucine. Analysis of fatty acid profiles in S. cerevisiae yeast supplemented with selenium showed an increase in the unsaturated fatty acid content (e.g., C18:1). The presence of margaric acid (C17:0) and hexadecanoic acid (C17:1) was found in the C. utilis biomass enriched with selenium, in contrast to that of S. cerevisiae. These results indicate that selenium may induce lipid peroxidation, which consequently affects the loss of integrity of the cytoplasmic membrane. Yeast enriched with selenium with optimal amino acid and lipid composition can be used to prepare a novel formula of dietary supplements, which can be applied directly to various diets for both humans and animals.

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Section: Resultsmentioning

confidence: 99%

Effect of Selenium on Lipid and Amino Acid Metabolism in Yeast Cells

Kieliszek

Błażejak

Bzducha-Wróbel

et al. 2018

Biol Trace Elem Res

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“…and Chlorella spp. have a large economic value for the production of functional food and dietary supplements (Schiavon et al, 2017); while Dunaliella salina and Haematococcus pluvialis are used to obtain two popular antioxidants, β-carotene and astaxanthin (Bajpai et al, 2013). Microalgae have also gained increasing interest as a source of renewable energy (e.g., biofuel production) and for industrial and domestic wastewater bioremediation (Spolaore et al, 2006; Chiaiese et al, 2011; Renuka et al, 2018).…”

Section: Microalgae As a Renewable Source Of Plant Biostimulantsmentioning

confidence: 99%

Renewable Sources of Plant Biostimulation: Microalgae as a Sustainable Means to Improve Crop Performance

et al. 2018

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Plant biostimulants (PBs) attract interest in modern agriculture as a tool to enhance crop performance, resilience to environmental stress, and nutrient use efficiency. PBs encompass diverse organic and inorganic substances (humic acids and protein hydrolysates) as well as prokaryotes (e.g., plant growth promoting bacteria) and eukaryotes such as mycorrhiza and macroalgae (seaweed). Microalgae, which comprise eukaryotic and prokaryotic cyanobacteria (blue-green algae), are attracting growing interest from scientists, extension specialists, private industry and plant growers because of their versatile nature: simple unicellular structure, high photosynthetic efficiency, ability for heterotrophic growth, adaptability to domestic and industrial wastewater, amenability to metabolic engineering, and possibility to yield valuable co-products. On the other hand, large-scale biomass production and harvesting still represent a bottleneck for some applications. Although it is long known that microalgae produce several complex macromolecules that are active on higher plants, their targeted applications in crop science is still in its infancy. This paper presents an overview of the main extraction methods from microalgae, their bioactive compounds, and application methods in agriculture. Mechanisms of biostimulation that influence plant performance, physiology, resilience to abiotic stress as well as the plant microbiome are also outlined. Considering current state-of-the-art, perspectives for future research on microalgae-based biostimulants are discussed, ranging from the development of crop-tailored, highly effective products to their application for increasing sustainability in agriculture.

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“…Gasoline exposure (Pilatti et al 2016), as well as ultraviolet radiation (Polo et al 2014), heavy metals (Santos et al 2015;Schiavon et al 2017) and diesel oil (Ramlov et al 2014) may promote significant changes in photosynthetic parameters, in low molecular-weight compounds such as carotenoids an accessory pigments, and in cell wall constituents like phenolic compounds. In addition, analysis of morphological changes in response to abiotic stress provides another way to confirm results from biochemical studies as well as those provided by microscopy techniques.…”

Section: Introductionmentioning

confidence: 99%

Hypnea musciformis (Wulfen) J. V. Lamour. (Gigartinales, Rhodophyta) responses to gasoline short-term exposure: biochemical and cellular alterations

et al. 2019

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Presence of toxic compounds in marine coastal waters has increased exponentially since Industrial Revolution. In this way, we aimed to evaluate biochemical and physiological changes occurring within Hypnea musciformis after short-term exposure to gasoline. Hypnea musciformis was cultivated without gasoline and then exposed to various concentrations of it (0.001 %-1.0 %, v/v) for periods of 30 min, 1 h, 12 h and 24 h. A Pricncipal Compound Analysis of UV-vis spectral window (200-700 nm) was able to discriminate gasoline-exposed samples according to both exposure time and gasoline concentration. Changes in carotenoid profile composition were observed. Decreased carotenoid content was associated to gasoline exposure time, being lutein and trans-β-carotene the major compounds found. Higher gasoline concentrations negatively interfered with phenolic compounds accumulation. In addition, increased gasoline concentrations corresponded to decreased intracellular starch grains content as well as increased its deposition on cell wall external surface. Data obtained allow us to conclude that gasoline can damage Hypnea musciformis physiology and cell morphology. This is important, considering Hypnea musciformis carotenoids and phenolics are potential biomarkers of environmental stress investigated, as well as its increased cell wall thickness to avoid gasoline diffusion.

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Selenium accumulation and metabolism in algae

Cited by 110 publications

References 100 publications

Effect of Selenium on Lipid and Amino Acid Metabolism in Yeast Cells

Effect of Selenium on Lipid and Amino Acid Metabolism in Yeast Cells

Renewable Sources of Plant Biostimulation: Microalgae as a Sustainable Means to Improve Crop Performance

Hypnea musciformis (Wulfen) J. V. Lamour. (Gigartinales, Rhodophyta) responses to gasoline short-term exposure: biochemical and cellular alterations

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