Comparing the influence of selenite (Se4+) and selenate (Se6+) on the inhibition of the mercury (Hg) phytotoxicity to pak choi

Tran, Thi Anh Thu; Dinh, Quang Toan; Cui, Zeiwei; Huang, Jie; Wang, Dan; Wei, Tian-Jiao; Liang, Dong; Sun, Xu; Ning, Ping

doi:10.1016/j.ecoenv.2017.09.061

Cited by 36 publications

(8 citation statements)

References 48 publications

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“…Se-Hg antagonism can also occur in dryland ecosystems, the mechanism for which is also that formation of insoluble HgSe complexes that precipitate and reduce Hg bioavailability and absorption by dryland plants. Tran et al (2018a) demonstrated that the reduction in bioavailability of Hg depends on Se species; Se(IV) was more effective than Se(VI) in limiting Hg bioavailability and absorption, for pakchoi planted in dryland soil. It needs to be noted that such an effect only manifests significantly when Se(IV) and Hg are at a level of 2.5 and 3.0 mg kg −1 , respectively.…”

Section: The Role Of Selenium In the Regulation Of Mercury Bioavailabmentioning

confidence: 99%

“…These metals are readily absorbed by most plants and pose a potential health risk to livestock animals and humans as they enter the food chain ( Zhao F. et al, 2010 ). In the past 10 years, great progress has been made in reducing heavy metal absorption and accumulation in grains by virtue of Se soil amendments ( Zhang H. et al, 2014 ; Tran et al, 2018a ; Camara et al, 2019 ; Li et al, 2019a ).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: The Role Of Selenium In the Regulation Of Mercury Bioavailabmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…The application of Se fertilizer to plant not only can increase the Se content in crops and the Se intake in humans, but also reduces the Hg accumulation in crop plants ( Li et al., 2015 ; Tang et al., 2017 ; Tran et al., 2018 ). The reduction of Hg accumulation in crops reduces Hg intake in the diet and protects human health.…”

Section: Introductionmentioning

confidence: 99%

“…The reduction of Hg accumulation in crops reduces Hg intake in the diet and protects human health. Fertilizing crops with Se with the aim to decrease Hg uptake and concentration in crops could be a win–win situation ( Tran et al., 2018 ). Many researchers have studied the Se–Hg antagonism in soil–crop systems, although there are inconsistencies in their reported results.…”

Section: Introductionmentioning

confidence: 99%

A quantitative review of the effects of Se application on the reduction of Hg concentration in plant: a meta-analysis

et al. 2023

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Mercury (Hg) is a highly toxic heavy metal entering the human body through the food chain after absorption by plant. Exogenous selenium (Se) has been suggested as a potential solution to reduce Hg concentration in plants. However, the literature does not provide a consistent picture of the performance of Se on the accumulation of Hg in plant. To obtain a more conclusive answer on the interactions of Se and Hg, 1,193 data records were collected from 38 publications for this meta-analysis, and we tested the effects of different factors on Hg accumulation by meta-subgroup analysis and meta-regression model. The results highlighted a significant dose-dependent effect of Se/Hg molar ratio on the reduction of Hg concentration in plants, and the optimum condition for inhibiting Hg accumulation in plants is at a Se/Hg ratio of 1–3. Exogenous Se significantly reduced Hg concentrations in the overall plant species, rice grains, and non-rice species by 24.22%, 25.26%, and 28.04%, respectively. Both Se(IV) and Se(VI) significantly reduced Hg accumulation in plants, but Se(VI) had a stronger inhibiting effect than Se(IV). Se significantly decreased the BAFGrain in rice, which indicated that other physiological processes in rice may be involved in restricting uptake from soil to rice grain. Therefore, Se can effectively reduce Hg accumulation in rice grain, which provides a strategy for effectively alleviating the transfer of Hg to the human body through the food chain.

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“…Selenium (Se) is among the essential micronutrients for humans and animals, and it has diverse functions, including removing free radicals, promoting anti-inflammation, enhancing immunity, delaying aging, and preventing cancer. − The biological effectiveness, bioavailability, and toxicity of Se not only depend on the total amount of Se but also are closely related to its chemical form in Se-enriched products . Inorganic Se (elemental Se, selenate, selenite, and selenide) is absorbed by plant roots and leaves and is assimilated into organic Se sources, such as selenomethionine (SeMet), selenocystine (SeCys2), and selenocysteine (SeCys), which comprise selenoproteins. − SeMet is the main source of Se intake for humans.…”

Section: Introductionmentioning

confidence: 99%

Selenium Application Enhances the Accumulation of Flavones and Anthocyanins in Bread Wheat (Triticum aestivum L.) Grains

Zhang

et al. 2022

J. Agric. Food Chem.

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Selenium (Se) biofortification in wheat reduces the risk of Se deficiency in humans. Se biofortification increases the concentration of Se and anthocyanins in wheat grains. However, it is unknown whether Se biofortification can enhance flavonoids other than anthocyanins and the mechanism underlying flavonoid accumulation in wheat grains. Here, foliar application of selenite solution in wheat was conducted 10 days after flowering. Metabolite profiling and transcriptome sequencing were performed in Se-treated grains. A significant increase in the total contents of Se, anthocyanins, and flavonoids was observed in Se-treated mature grains. Twenty-seven significantly increased flavonoids were identified in Se-treated immature grains. The significant accumulation of flavones (tricin, tricin derivatives, and chrysoeriol derivatives) was detected, and six anthocyanins, dihydroquercetin (the precursor for anthocyanin biosynthesis) and catechins were also increased. Integrated analysis of metabolites and transcriptome revealed that Se application enhanced the biosynthesis of flavones, dihydroquercetin, anthocyanins, and catechins by increasing the expression levels of seven key structural genes in flavonoid biosynthesis (two TaF3Hs, two TaDFRs, one TaF3′5′H, one TaOMT, and one TaANR). Our findings shed new light on the molecular mechanism underlying the enhancement in flavonoid accumulation by Se supplementation and pave the way for further enhancing the nutritional value of wheat grains.

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Comparing the influence of selenite (Se4+) and selenate (Se6+) on the inhibition of the mercury (Hg) phytotoxicity to pak choi

Cited by 36 publications

References 48 publications

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

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

A quantitative review of the effects of Se application on the reduction of Hg concentration in plant: a meta-analysis

Selenium Application Enhances the Accumulation of Flavones and Anthocyanins in Bread Wheat (Triticum aestivum L.) Grains

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