Bioavailability of selenium in soil-plant system and a regulatory approach

Dinh, Quang Toan; Wang, Mengke; Tran, Thi Anh Thu; Zhou, Fei; Wang, Dan; Zhai, Hua‐Jin; Peng, Qin; Xue, Mingyue; Du, Zekun; Bañuelos, Gary S.; Lin, Zhi-Qing; Liang, Dongli

doi:10.1080/10643389.2018.1550987

Cited by 138 publications

(57 citation statements)

References 330 publications

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“…In contrast, a negative correlation was recorded between Se and N in barley (Ilbas et al 2012 ), which may be due to application of high Se doses resulting in Se toxicity. Similar to our observations, Eich-Greatorex et al ( 2010 ) observed high P uptake by Se application suggesting that Se interactions with phosphate are largely dependent on the source of Se as selenite uptake is not efficient in P-enriched medium (Dinh et al 2019 ). Contrary to our earlier report about no significant effect of Se on K content of wheat seeds (Nawaz et al 2015b ), an increased K content was recorded in mung bean seeds with S + Se treatment.…”

Section: Discussionsupporting

confidence: 91%

Physiological insights into sulfate and selenium interaction to improve drought tolerance in mung bean

Aqib

Nawaz

Majeed

et al. 2021

Physiol Mol Biol Plants

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The present study involved two pot experiments to investigate the response of mung bean to the individual or combined SO42− and selenate application under drought stress. A marked increment in biomass and NPK accumulation was recorded in mung bean seedlings fertilized with various SO42− sources, except for CuSO4. Compared to other SO42− fertilizers, ZnSO4 application resulted in the highest increase in growth attributes and shoot nutrient content. Further, the combined S and Se application (S + Se) significantly enhanced relative water content (16%), SPAD value (72%), photosynthetic rate (80%) and activities of catalase (79%), guaiacol peroxidase (53%) and superoxide dismutase (58%) in the leaves of water-stressed mung bean plants. Consequently, the grain yield of mung bean was markedly increased by 105% under water stress conditions. Furthermore, S + Se application considerably increased the concentrations of P (47%), K (75%), S (80%), Zn (160%), and Fe (15%) in mung bean seeds under drought stress conditions. These findings indicate that S + Se application potentially increases the nutritional quality of grain legumes by stimulating photosynthetic apparatus and antioxidative machinery under water deficit conditions. Our results could provide the basis for further experiments on cross-talk between S and Se regulatory pathways to improve the nutritional quality of food crops.

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Section: Discussionsupporting

confidence: 91%

Physiological insights into sulfate and selenium interaction to improve drought tolerance in mung bean

Aqib

Nawaz

Majeed

et al. 2021

Physiol Mol Biol Plants

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“…To sum up, Se is of great nutritional significance in humans and of significant importance in reducing the bioconcentration of heavy metals in the food chain (Dinh et al, 2019). An ideal crop is one with high bioavailability of essential elements such as Se, but with reduced accumulation of metals such as Cd, As, and Hg in the edible parts (Huang S. et al, 2020).…”

Section: Introductionmentioning

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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“…In this regard, a critical factor is the particular capacity of a given plant to metabolically engage, and subsequently accumulate, Se in various forms 4,5 . Frequently, foliar or soil Se-fertilization is undertaken in agricultural crops in order to improve Se concentration in edible plants 6–10 .…”

Section: Introductionmentioning

confidence: 99%

Selenium maintains cytosolic Ca2+ homeostasis and preserves germination rates of maize pollen under H2O2-induced oxidative stress

Pino

Guiducci

D’Amato

et al. 2019

Sci Rep

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Selenium (Se) displays antioxidant properties that can be exploited, in plants, to counteract abiotic stresses caused by overly-produced reactive oxygen species (ROS). Here, we show that fertigation of maize crops with sodium selenate effectively protects pollen against oxidative stress. Pollen isolated from Se-treated plants (Se1) and untreated controls (Se0) was incubated in vitro with H2O2 to produce oxidative challenge. Given the impact of ROS on Ca2+ homeostasis and Ca2+-dependent signaling, cytosolic Ca2+ was measured to monitor cellular perturbations. We found that H2O2 disrupted Ca2+ homeostasis in Se0 pollen only, while Se1 samples were preserved. The same trend was observed when Se0 samples were treated with sodium selenate or Se-methionine, which recapitulated in vitro the protective capacity of Se-fertigation. Furthermore, we found that germination rates were much better retained in Se1 as compared to Se0 (46% vs 8%, respectively) after exposure to 20 mM H2O2. The same was observed with Se0 pollen treated with Se-methionine, which is the organic form of Se into which most fertigated sodium selenate converts in the plant. These results, together, show a close correlation between ROS, Ca2+ homeostasis and pollen fertility, and provide strong evidence that Se-fertigation is an excellent approach to preserve or enhance agricultural productivity.

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Bioavailability of selenium in soil-plant system and a regulatory approach

Cited by 138 publications

References 330 publications

Physiological insights into sulfate and selenium interaction to improve drought tolerance in mung bean

Physiological insights into sulfate and selenium interaction to improve drought tolerance in mung bean

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

Selenium maintains cytosolic Ca2+ homeostasis and preserves germination rates of maize pollen under H2O2-induced oxidative stress

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