Mechanisms of selenium hyperaccumulation in plants: A survey of molecular, biochemical and ecological cues

Lima, Leonardo Warzea; Pilon‐Smits, Elizabeth A. H.; Schiavon, Michela

doi:10.1016/j.bbagen.2018.03.028

Cited by 75 publications

(52 citation statements)

References 134 publications

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“…On the other hand, plants benefit from the accumulated Se. It promotes plant growth, yield, and resistance to abiotic stress and pathogens [53]. Our results indicate that grapevine NIPs of other groups like VvTnNIP1;1 (NIP-I group) and VvTnNIP6;1 (NIP-II group) are putatively permeable to selenite, suggesting that their permeability is not restricted to the NIP-III group.…”

Section: Boron (B)mentioning

confidence: 77%

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Molecular and Functional Characterization of Grapevine NIPs through Heterologous Expression in aqy-Null Saccharomyces cerevisiae

Sabir

Gomes

Loureiro-Dias

et al. 2020

IJMS

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Plant Nodulin 26-like Intrinsic Proteins (NIPs) are multifunctional membrane channels of the Major Intrinsic Protein (MIP) family. Unlike other homologs, they have low intrinsic water permeability. NIPs possess diverse substrate selectivity, ranging from water to glycerol and to other small solutes, depending on the group-specific amino acid composition at aromatic/Arg (ar/R) constriction. We cloned three NIPs (NIP1;1, NIP5;1, and NIP6;1) from grapevine (cv. Touriga Nacional). Their expression in the membrane of aqy-null Saccharomyces cerevisiae enabled their functional characterization for water and glycerol transport through stopped-flow spectroscopy. VvTnNIP1;1 demonstrated high water as well as glycerol permeability, whereas VvTnNIP6;1 was impermeable to water but presented high glycerol permeability. Their transport activities were declined by cytosolic acidification, implying that internal-pH can regulate NIPs gating. Furthermore, an extension of C-terminal in VvTnNIP6;1M homolog, led to improved channel activity, suggesting that NIPs gating is putatively regulated by C-terminal. Yeast growth assays in the presence of diverse substrates suggest that the transmembrane flux of metalloids (As, B, and Se) and the heavy metal (Cd) are facilitated through grapevine NIPs. This is the first molecular and functional characterization of grapevine NIPs, providing crucial insights into understanding their role for uptake and translocation of small solutes, and extrusion of toxic compounds in grapevine.

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Section: Boron (B)mentioning

confidence: 77%

“…On the other hand, plants benefit from the accumulated Se. It promotes plant growth, yield, and resistance to abiotic stress and pathogens [53].…”

Section: Selenium (Se)mentioning

confidence: 99%

Molecular and Functional Characterization of Grapevine NIPs through Heterologous Expression in aqy-Null Saccharomyces cerevisiae

Sabir

Gomes

Loureiro-Dias

et al. 2020

IJMS

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“…Se-amino acids in particular, are likely to enter the plant cells via broad specificity amino acid transporters ( Fig. 1) (Lima et al 2018). Though, selenate is the main form of Se taken up by plants, and its transport across cell membranes is an energy-dependent process mediated by the sulphate transport system (Lima et al 2018; Schiavon and Pilon-Smits 2017a; White 2018).…”

Section: Selenium Uptake and Assimilation Pathways In Plantsmentioning

confidence: 99%

“…1) (Lima et al 2018). Though, selenate is the main form of Se taken up by plants, and its transport across cell membranes is an energy-dependent process mediated by the sulphate transport system (Lima et al 2018; Schiavon and Pilon-Smits 2017a; White 2018). Competition events in soil between sulphate and selenate, as well as plant sulphate transporters (SULTR) differing in affinity for these two anions, influence the rate of selenate uptake by plants (El Mehdawi et al 2018;White et al 2004, White 2016 (Wang et al 2019;Zhao (FJ) et al 2010, b), while HSeO 3 − and part of SeO 3 2− mainly use lowand high-affinity P transporters (OsPT2), respectively (Zhang et al 2014).…”

Section: Selenium Uptake and Assimilation Pathways In Plantsmentioning

confidence: 99%

Selenium biofortification in the 21st century: status and challenges for healthy human nutrition

et al. 2020

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Background Selenium (Se) is an essential element for mammals and its deficiency in the diet is a global problem. Plants accumulate Se and thus represent a major source of Se to consumers. Agronomic biofortification intends to enrich crops with Se in order to secure its adequate supply by people. Scope The goal of this review is to report the present knowledge of the distribution and processes of Se in soil and at the plant-soil interface, and of Se behaviour inside the plant in terms of biofortification. It aims to unravel the Se metabolic pathways that affect the nutritional value of edible plant products, various Se biofortification strategies in challenging environments, as well as the impact of Se-enriched food on human health. Conclusions Agronomic biofortification and breeding are prevalent strategies for battling Se deficiency. Future research addresses nanosized Se biofortification, crop enrichment with multiple micronutrients, microbial-integrated agronomic biofortification, and optimization of Se biofortification in adverse conditions. Biofortified food of superior nutritional quality may be created, enriched with healthy Se-compounds, as well as several other valuable phytochemicals. Whether such a food source might be used as nutritional intervention for recently emerged coronavirus infections is a relevant question that deserves investigation.

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“…Se-amino acids, in particular, are likely to enter plant cells via amino acid transporters (AA Tr.) (Figure 1; Lima et al, 2018;Schiavon et al, 2020). It has therefore been reasoned that SeCys and SeMet can be taken up by this amino acid transporter as well.…”

Section: Organic Se Species Uptakementioning

confidence: 99%

Selenium Biofortification and Interaction With Other Elements in Plants: A Review

et al. 2020

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Selenium (Se) is an essential element for humans and animals and its deficiency in the diet is a global problem. Crop plants are the main source of Se for consumers. Therefore, there is much interest in understanding the factors that govern the accumulation and distribution of Se in the tissues of crop plants and the mechanisms of interaction of Se absorption and accumulation with other elements, especially with a view toward optimizing Se biofortification. An ideal crop for human consumption is rich in essential nutrient elements such as Se, while showing reduced accumulation of toxic elements in its edible parts. This review focuses on (a) summarizing the nutritional functions of Se and the current understanding of Se uptake by plant roots, translocation of Se from roots to shoots, and accumulation of Se in grains; and (b) discussing the influence of nitrogen (N), phosphorus (P), and sulfur (S) on the biofortification of Se. In addition, we discuss interactions of Se with major toxicant metals (Hg, As, and Cd) frequently present in soil. We highlight key challenges in the quest to improve Se biofortification, with a focus on both agronomic practice and human health.

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Mechanisms of selenium hyperaccumulation in plants: A survey of molecular, biochemical and ecological cues

Cited by 75 publications

References 134 publications

Molecular and Functional Characterization of Grapevine NIPs through Heterologous Expression in aqy-Null Saccharomyces cerevisiae

Molecular and Functional Characterization of Grapevine NIPs through Heterologous Expression in aqy-Null Saccharomyces cerevisiae

Selenium biofortification in the 21st century: status and challenges for healthy human nutrition

Selenium Biofortification and Interaction With Other Elements in Plants: A Review

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