Accumulation and volatilization of different chemical species of selenium by plants

Zayed, Adel; Lytle, C. Mel; Terry, Norman

doi:10.1007/s004250050402

Cited by 383 publications

(305 citation statements)

References 32 publications

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“…Animals do not distinguish between Se-Met and its S-analogue Met. Both amino acids are incorporated in proteins via the same enzymatic pathway [3] In plants selenate is much more easily transported than selenite or organic Se [4]. Se distribution over several plant compartments depends on plant species, developmental phase, physiological condition, form, and concentration of the Se available, and the presence of other substances, Manuscript [5].…”

Section: B Selenium Forms In the Biological Systemsmentioning

confidence: 99%

Elemental, Nano-Sized (100-500 nm) Selenium Production by Probiotic Lactic Acid Bacteria

Eszenyi¹,

Sztrik²,

Babka³

et al. 2011

IJBBB

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Abstract-Selenium is well known as an essential trace element since the 20th century, but it can be overdosed easily because of its toxicity. According to the present regulations [1] only the potentially most harmful, inorganic selenium salts can be added to any comestibles. Elemental selenium is considered as the least toxical of all selenium forms and in the same time supplementation with its nano-size particles has the same or better bioavailability compared to its salts. In our experiments we managed to produce nano-size (100-500nm) elemental selenium by using probiotic yogurt bacteria in a fermentation procedure. We developed the laboratory technology of product purification and recovery from bacteria.

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Section: B Selenium Forms In the Biological Systemsmentioning

confidence: 99%

Elemental, Nano-Sized (100-500 nm) Selenium Production by Probiotic Lactic Acid Bacteria

Eszenyi¹,

Sztrik²,

Babka³

et al. 2011

IJBBB

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“…Ge et al (1996) showed that plants grown under standard nutritional conditions with addition of sodium selenate were found to contain methyl-selenocysteine, selenocystine, selenite, selenomethionine, and selenate, in that order of abundance. While plants are known to volatilize selenium, the volatile forms are created by the active reduction of organic and inorganic forms of selenium by the plant (Zayed et al 1998). The reduction of organic and inorganic selenium would not be expected to continue when the plant dies, until microorganisms begin the degradation of the plant tissue.…”

Section: Introductionmentioning

confidence: 99%

“…Selenate and selenite are the dominant forms of dissolved Se in natural and contaminated waters, while the organic species are most likely the product of biotransformation by microphytes and bacteria (Fan et al, 2002). Many studies have used seleno-DL-methionine (Trumble et al, 1998;Vickerman and Trumble, 2003;Zayed et al, 1998), which contains a 50:50 ratio of the two stereoisomers of the compound. However, Heinz et al (1996) and Hoffman et al (1996) found stereospecific effects with significantly higher mortality in Mallard ducklings exposed to the L-form of the selenium compound.…”

Section: Introductionmentioning

confidence: 99%

Developmental Responses of a Terrestrial Insect Detritivore, Megaselia scalaris (Loew) to Four Selenium Species

2005

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Abstract. Megaselia scalaris (Loew) (Diptera: Phoridae) is an important and ubiquitous terrestrial detritivore that consumes both animal and plant material. Because both plants and animals convert selenium pollutants into various forms, the relative toxicities of ecologically relevant concentrations of sodium selenate, sodium selenite, seleno-L-methionine, and Se-(methyl) selenocysteine hydrochloride to larvae were assessed in diet bioassays. In addition, ovipositional preferences of adults and developmental effects on the eggs and larvae were measured. With chronic exposure selenocysteine was the most toxic of the selenium species to the larvae (LC 50 : 83 lg/g wet weight), followed by seleno-L-methionine (LC 50 : 130 lg/g), selenate (LC 50 : 258 lg/g), and selenite (LC 50 : 392 lg/g). Ovipositing females did not discriminate between the highest treatment concentrations of any of the pollutants as compared to the controls, indicating a lack of avoidance behavior. Larval development time was significantly increased with exposure to selenate at 100 lg/g wet weight and above, selenite at 300 lg/g and above, and at 50 lg/g and 25 lg/g and above for seleno-L-methionine and selenocysteine respectively. Pupal development was not affected by any of the selenium treatments. Significant differences between male and female adult eclosion times were observed, with females eclosing later than males as selenium concentrations increased. Significant decreases in larval survival relative to controls occurred at the lowest treatment tested (100 lg/g) for both selenate and selenite and at 100 lg/g for seleno-L-methionine, and 50 lg/g for selenocysteine. The population level implications of lack of avoidance of contaminated food, and the effects of increased development times, reduced survivorship, and non-synchronized male and female emergence are discussed.

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“…More Se accumulates in shoot and leaf than in root tissues in different plants, but there are some exceptions (Zayed et al, 1998). Se concentrations in the up-ground parts, roots, stolons, and tubers of potato will increase with increasing Se supplementation, as reported by Turakainen (2007).…”

Section: Selenium In the Soil-plant-food Systemsmentioning

confidence: 79%

Selenium in soil–plant–food systems

Garousi

2017

Acta Universitatis Sapientiae, Alimentaria

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Abstract.Humans and animals require a multitude of nutrients in order to have a properly functioning body for purposes of growth, development and metabolism. Plant-based foods have represented one of the most important nutrient sources in human diet since the beginning of mankind. But nowadays the amount of arable land is being reduced and much of the natural resources already in use show signs of degradation. Also, staple crops (i.e. plants that constitute the main food in the diets of people in developing countries, e.g. wheat, rice, maize, and cassava) regrettably contain low amounts of micronutrients, making them insufficient to meet the minimum daily requirements. Shortages in mineral micronutrients, including iron (Fe), zinc (Zn), selenium (Se), and iodine (I), are affecting more than half of the world's population. In this case, it is fundamental to improve strategies that let us make plant foods more efficient and with higher micronutrient amounts and bioavailability concerning their edible textures. In this regard, in this review paper, we tried to summarize selenium availability and its application in the soil, plant and food systems to understand the place of selenium in plant-based foods.

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Accumulation and volatilization of different chemical species of selenium by plants

Cited by 383 publications

References 32 publications

Elemental, Nano-Sized (100-500 nm) Selenium Production by Probiotic Lactic Acid Bacteria

Elemental, Nano-Sized (100-500 nm) Selenium Production by Probiotic Lactic Acid Bacteria

Developmental Responses of a Terrestrial Insect Detritivore, Megaselia scalaris (Loew) to Four Selenium Species

Selenium in soil–plant–food systems

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