Nitric oxide enhances selenium concentration by promoting selenite uptake by rice roots

Xiao, Qiang; Li, Xiuling; Gao, Gui‐Feng; Chen, Juan; Liu, Xiang; Shen, Zhijun; Zhu, Xike; Zheng, Hai-Lei

doi:10.1002/jpln.201700013

Cited by 7 publications

(3 citation statements)

References 52 publications

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“…1, 2, and 4b). In line with the previous assumptions [27, 28], the unique expression patterns presenting in the two rice varieties support that OsNIP2;1 may serve as a main positive regulator in Se transportation. Although the result showed that Se continuously induces the expression of OsSultr1;2 , a sulfate transporter in presence of all concentrations of Se, we observed no obvious difference between the two rice varieties in those scenarios (Fig.…”

Section: Resultssupporting

confidence: 88%

Quick selenium accumulation in the selenium-rich rice and its physiological responses in changing selenium environments

Liang

Yang

et al. 2019

BMC Plant Biol

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BackgroundThe element selenium (Se) deficiency is thought to be a global human health problem, which could disperse by daily-supplement from Se-rich food. Increasing the accumulation of Se in rice grain is an approach matched to these nutrient demands. Nonetheless, Se is shown to be essential but also toxic to plants, with a narrow margin between deficiency and toxicity. Notably, the regulatory mechanism balancing the accumulation and tolerance of Se in Se-rich rice plants remains unknown.ResultsIn this study, we investigated the phenotypical, physiological, and biochemical alterations of Se-rich rice in the exposure to a variety of Se applications. Results showed that the Se-rich rice was able to accumulate more abundance of Se from the root under a low Se environment comparing to the Se-free rice. Besides, excessive Se led to phytotoxic effects on Se-rich rice plants by inducing chlorosis and dwarfness, decreasing the contents of antioxidant, and exacerbating oxidative stresses. Furthermore, both phosphate transporter OsPT2 and sulfate transporters OsSultr1;2 may contribute to the uptake of selenate in rice.ConclusionsSe-rich red rice is more sensitive to exogenous application of Se, while and the most effective application of Se in roots of Se-rich rice was reached in 20 μM. Our findings present a direct way to evaluate the toxic effects of Se-rich rice in the Se contaminated field. Conclusively, some long-term field trial strategies are suggested to be included in the evaluation of risks and benefits within various field managements.

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Section: Resultssupporting

confidence: 88%

Quick selenium accumulation in the selenium-rich rice and its physiological responses in changing selenium environments

Liang

Yang

et al. 2019

BMC Plant Biol

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show abstract

“…1, 2, and 4b). In line with the previous assumptions [37,38], the unique expression patterns presenting in the two rice varieties support that OsNIP2;1 may serve as a main positive regulator in Se transportation. Although the result showed that Se continuously induces the expression of OsSultr1;2, a sulfate transporter in presence of all concentrations of Se, we observed no obvious difference between the two rice varieties in those scenarios (Fig.…”

Section: The Gene Expression Patterns Of Se Uptake-and Transport-relasupporting

confidence: 88%

Quick selenium accumulation in the selenium-rich rice and its physiological responses in changing selenium environments

Liang

Yang

et al. 2019

Preprint

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Background:The element selenium (Se) deficiency is thought to be a global human health problem, which could disperse by daily-supplement from Se-rich food. Increasing the accumulation of Se in rice grain is an approach matched to these nutrient demands. Nonetheless, Se is shown to be essential but also toxic to plants, with a narrow margin between deficiency and toxicity. Notably, the regulatory mechanism balancing the accumulation and tolerance of Se in Se-rich rice plants remains unknown. Results:In this study, we investigated the phenotypical, physiological, and biochemical alterations of Se-rich rice in the exposure to a variety of Se applications. Results showed that the Se-rich rice was able to accumulate more abundance of Se from the root under a low Se environment comparing to the Se-free rice. Besides, excessive Se led to phytotoxic effects on Se-rich rice plants by inducing chlorosis and dwarfness, decreasing the contents of antioxidant, and exacerbating oxidative stresses. Furthermore, both phosphate transporter OsPT2 and sulfate transporters OsSultr1;2 may contribute to the uptake of selenate in rice. Conclusions: Se-rich red rice is more sensitive to exogenous application of Se, while and the most effective application of Se in roots of Se-rich rice was reached in 20μM. Our findings present a direct way to evaluate the toxic effects of Se-rich rice in the Se contaminated field. Conclusively, some long-term field trial strategies are suggested to be included in the evaluation of risks and benefits within various field managements.

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“…Furthermore, NO supplementation stimulated glutathione biosynthesis by up-regulating γglutamylcysteine synthetase (γ-ECS) and glutathione synthetase (GS), and increased the expression of cysteine synthase (CS) resulting in triggered Se metabolism. These data imply the possibility that not only selenium affects endogenous NO/RNS metabolism and signaling, but also that NO has an effect on Se uptake and metabolism (Xiao et al, 2017).…”

Section: A C C E P T E Dmentioning

confidence: 73%

Plant selenium toxicity: Proteome in the crosshairs

Kolbert

Molnár

Feigl

et al. 2019

Journal of Plant Physiology

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The metalloid element, selenium (Se) is in many ways special and perhaps because of this its research in human and plant systems is of great interest. Despite its non-essentiality, higher plants take it up and metabolize it via sulfur pathways, but higher amounts of Se cause toxic symptoms in plants. However, the molecular mechanisms of selenium phytotoxicity have been only partly revealed; the data obtained so far point out that Se toxicity targets the plant proteome. Besides seleno-and oxyproteins, nitroproteins are also formed due to Se stress. In order to minimize proteomic damages induced by Se, certain plants are able to redirect selenocysteine away from protein synthesis thus preventing Se-protein formation. Additionally, the damaged or malformed selenoproteins, oxyproteins and nitroproteins may be removed by proteasomes. Based on the literature this review sets Se toxicity mechanisms into a new concept and it draws attention to the importance of Se-induced protein-level changes.

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Nitric oxide enhances selenium concentration by promoting selenite uptake by rice roots

Cited by 7 publications

References 52 publications

Quick selenium accumulation in the selenium-rich rice and its physiological responses in changing selenium environments

Quick selenium accumulation in the selenium-rich rice and its physiological responses in changing selenium environments

Quick selenium accumulation in the selenium-rich rice and its physiological responses in changing selenium environments

Plant selenium toxicity: Proteome in the crosshairs

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