Involvement of Selenium in Protective Mechanisms of Plants …
plant genotypes and is mainly connected with activation of antioxidative defense in plant cells. K K e e y y w w o o r r d d s s : : Selenium, environmental stresses, protective mechanisms
plant genotypes and is mainly connected with activation of antioxidative defense in plant cells. K K e e y y w w o o r r d d s s : : Selenium, environmental stresses, protective mechanisms
Se has a wide range of applications. It can be doped into optical materials to improve their stability and carrier mobility [13].In photovoltaic cells, Se can serve as a key material to enhance the conversion efficiency of solar energy into electricity [14].In the electronic field, Se is used in the manufacturing of rectifiers, Se batteries, and other …
However, in most cases that have been investi-gated, the enzymes in plant secondary metab-olism are specific for a given substrate and produce a single product. Plant genomes are variously estimated to contain 20 000–60 000 genes, and perhaps 15–25% of these genes encode enzymes for secondary metabolism 15,16. Clearly, the …
As an essential trace element, selenium (Se) plays a tremendous role in the functioning of the human organism being used for the biosynthesis of selenoproteins (proteins containing one or several selenocysteine residues). The functions of human selenoproteins in vivo are extremely diverse. Many selenoproteins have an antioxidant activity and ...
Selenium (Se) is a naturally occurring non-metal element that exists in the (+6), (+4), (0), and (-2) oxidation states. The most oxidized forms - selenate (SeO 4 2−) and selenite (SeO 3 2−)- are water soluble and therefore both have a high degree of bioavailability and bioaccumulation potential in the environment (Saha et al., 2017).As …
Introduction. Selenium (Se) is an essential nutrient for many organisms, but also toxic at higher levels. As a nutrient, Se is an essential component of certain selenoproteins, some of which are important for scavenging free radicals and preventing cancer and infections [1].The toxicity of Se at higher concentrations is thought to be …
Organic forms originate basically from decaying plants that accumulate Se (Martens and Suarez, 1996; Rosenfeld and Beath, 2013). Globally, the mean Se level in …
Selenium is regulated in the body to maintain vital selenoproteins and to avoid toxicity. When selenium is limiting, cells utilize it to synthesize the selenoproteins most important to them, creating a selenoprotein hierarchy in the cell. The liver is the central organ for selenium regulation and pr …
The selenium content of subterranean parts of medicinal plants (μg/kg dry plant). The selenium content of fruits of medicinal plants (μg/kg dry plant). Figures - uploaded by Diana S Antal
Phytic acid actually blocks selenium. So if you want to consume Brazil nuts, be sure to soak them overnight and dry them out first to get rid of the phytic acid. Side Effects of Selenium. Is there any such thing as too much selenium? Absolutely. Selenium is a trace mineral, which means you need a very small amount of it.
Selenium (Se) is an essential micronutrient for both human and animals. Plants serve as the primary source of Se in the food chain. Se concentration and …
Selenium (Se) is a metalloid trace element [62].As an essential dietary element for humans, Se is conducive to improving human antioxidant and immune capabilities [105].Studies have shown that the daily intake of Se from natural foods is a safe way for humans to obtain Se [139].Notably, inadequate Se intake can result in human …
Selenium in higher plants: understanding mechanisms for biofortification and phytoremediation Yong-Guan Zhu1,2, Elizabeth A.H. Pilon-Smits3, ... olism is therefore important for Se nutrition of humans and other animals. However, the concentration of Se in plant foods varies between areas, and too much Se can ...
Major conclusions: Selenium and sulfur share the same primary metabolism. When grown in the same environment, most plant species have similar tissue Se/S quotients. …
It gets worse. A 1996 study with the riveting title, "Selenium content of foods purchased in North Dakota," reported that two brands of the exact same product, masa harina corn meal, bought at the same store, differed in their selenium content by a factor of 1,000%. So what's a person to do? The most common "selenium hack" is to consume …
Selenium-accumulating plants provide unique tools to help us understand selenium metabolism. They are also a source of genetic material that can be used to alter selenium metabolism and tolerance to help develop food crops that have enhanced levels of anticarcinogenic selenium compounds, as well as plants that are ideally suited for the ...
Furthermore, zinc and selenium have a significant role in plant and human life, and zinc affects nitrogen metabolism, photosynthesis, and resistance to abiotic and biotic stresses [63], while ...
2.1. Se Uptake by Plants. The two main forms of bioavailable Se in soils are selenate and selenite. Selenate is mainly found in alkaline and oxidized soils, whereas selenite mainly exists in acidic and reduced soils [].Plants also can take up organic Se, such as seleno-amino acids, but plants cannot absorb elemental or metal-selenide …
4. Primary metabolism of selenium in plants – The biosynthesis of SeCys and SeMet. Current understanding of Se metabolism in angiosperms is largely founded …
Selenium, discovered in 1817 by Jöns Jacob Berzelius, is known as an element with two faces in relation to human health: as a micronutrient essential for life and a potentially toxic trace element.
Selenium (Se) is a naturally occurring element found in coal and phosphate deposits, released into the environment through both natural processes, such as weathering, volcanic activity, and oceanic mechanisms, as well as through anthropogenic activities, including mining, coal combustion, nonferrous metal production, refuse incineration, and …
Introduction. Selenium (Se) is an essential trace element that is involved in major physiological processes like redox homeostasis, thyroid metabolism and boosts immune functions in the human body [].It has a relatively narrow window of beneficial effect and thus, both the deficiency and toxicity are of worldwide concern [].Se deficiency …
This review first classifies plant species on their abilities to accumulate Se in their tissues and to colonise seleniferous soils. It then presents our knowledge of Se uptake by roots and its movement within the plant, the primary and secondary metabolism of Se in plants, effects of Se on sulfur and nitrogen metabolism, and the detoxification of …
Garlic (Allium sativum L.) is susceptible to phosphorus (P) deficiency and because of coarse root system with low branching rate, this species is highly dependent on mycorrhizal symbiosis.As a beneficial element for higher plants, selenium (Se) improves nutritional and pharmaceutical quality of this species. In this research, the effect of Se (at 0, 20 and 80 …
Introduction. The breakthrough in selenium (Se) research came into existence in 1957, when Schwartz and Foltz showed that addition of Se in fodder prevented muscular dystrophy and liver cirrhosis in rats (Rayman, 2000).Another turning point in Se research came through the discovery of Se in enzyme Glutathione peroxidase (Rotruck …
The purpose of this review is to analyze and summarize the available data on the place of selenium in the secondary metabolism of plants and its effect on the accumulation of some plant ...
Selenium is a trace mineral that the human body needs in tiny amounts. It is also an important antioxidant and an essential part of a healthy immune system. An adult needs 55 mcg of the mineral each day. In excessively high amounts, however, selenium is toxic to humans, so your daily intake shouldn't exceed 400 mcg. Fish and meat are great …
Understanding selenium metabolism in plants and its role as a beneficial element
Protective effects of Se dosages on different plant species under UV – ultraviolet radiation, LT – low temper- ature and HT – high temperature conditions. …
The present study is aimed to frame a review on the regulation of plant defense system, chlorophyll retention and plant water relations so as to provide comprehensive understanding into the ...
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