An Overview of Selenium Uptake, Metabolism, and Toxicity in Plants
By Meetu Gupta, Shikha Gupta. Frontiers in Plant Science, 2017
762 citations recorded by the source corpus.
Selenium (Se) is an essential micronutrient for humans and animals, but lead to toxicity when taken in excessive amounts. Plants are the main source of dietary Se, but essentiality of Se for plants is still controversial. However, Se at low doses protects the plants from variety of abiotic stresses such as cold, drought, desiccation, and metal stress. In animals, Se acts as an antioxidant and helps in reproduction, immune responses, thyroid hormone metabolism. Selenium is chemically similar to sulfur, hence taken up inside the plants via sulfur transporters present inside root plasma membrane, metabolized via sulfur assimilatory pathway, and volatilized into atmosphere. Selenium induced oxidative stress, distorted protein structure and function, are the main causes of Se toxicity in plants at high doses. Plants can play vital role in overcoming Se deficiency and Se toxicity in different regions of the world, hence, detailed mechanism of Se metabolism inside the plants is necessary for designing effective Se phytoremediation and biofortification strategies.
Subfields: Nutrition and Dietetics
View Paper: https://www.semanticscholar.org/paper/0f02ce4461c04e913d8ff2e57b1fa46632765d52
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Citations in the corpus
- Bioavailability of selenium in soil-plant system and a regulatory approach (2018, background): “2018 Taylor & Francis Group, LLC only to mitigate the problem of Se deficiency but also to manage environmental Se toxicity (Ba~nuelos, Arroyo, Pickering, Yang, & Freeman, 2015; Hawrylak-Nowak, Matraszek, & Pogorzelec, 2015; Gupta & Gupta, 2016; dos Reis et al., 2017).”
- Selenium in soil-microbe-plant systems: Sources, distribution, toxicity, tolerance, and detoxification (2021, background): “…remain unaddressed: the mechanism behind the beneficial role of Se, the effect of Se on phytocomponents, methods to improve Se content in plants for nutritional value, links between sulfur and Se biochemistry, and the influence on Se uptake (Gupta & Gupta, 2016; Schiavon & Pilon-Smits, 2017).”