Effect of phosphorus status of the soil on selenium availability

Eich‐Greatorex, Susanne; Krogstad, Tore; Sogn, Trine A.

doi:10.1002/jpln.200900004

Cited by 39 publications

(7 citation statements)

References 31 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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“…This is caused by the strong complexation of phosphate in comparison to Se by hydrous ferric oxide surfaces [58], which is reflected by the respective complexation constants in the data base. This results in a very low selenium K d in fertilized soils which also has been reported by Eich-Greatorex et al [59]. The model predicts that at high phosphate concentrations, illite is the dominant sorbent, while at P < 0.1 mg/L, most of the selenium (>95%) is bound to hydrous oxide surfaces.…”

Section: Seleniumsupporting

confidence: 74%

A consistent model for estimating the partitioning of Am, Pu and Se in agricultural soils

Hormann

2021

J Radioanal Nucl Chem

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The component additive model UNiSeCs II for simulating the physicochemical behaviour of the radionuclides americium, plutonium and selenium in agricultural soils is presented. The model is validated by estimating the distribution coefficients (Kd) of these elements measured in batch experiments from the literature. For all three elements, the resulting average relative deviations from the experimental values are smaller than a factor of 2.5. This indicates that the model has the potential to significantly improve the predictions of radioecological models that normally use tabulated Kd values from the IAEA which are known to have large uncertainties. Using UNiSeCs II, the soil solution parameters most important for the partitioning of Am, Pu and Se are identified by single parameter variations.

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“…The bioavailability of Se in soils is not only affected by soil properties such as pH, redox conditions, organic matter content, and synergy or antagonism of coexisting elements (Eich-Greatorex et al, 2010;Wang, Q. et al, 2016), but is also related to soil Se content and fraction (Wang et al, 2012). Activating stable Se in soil is a key process to increase the content of available Se and promote Se uptake by plants.…”

Section: Highlights Introductionmentioning

confidence: 99%

The Interaction of Arbuscular Mycorrhizal Fungi and Phosphorus Inputs on Selenium Uptake by Alfalfa (Medicago sativa L.) and Selenium Fraction Transformation in Soil

Pan

Zhang

et al. 2020

Front. Plant Sci.

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Selenium (Se) is a beneficial element to plants and an essential element to humans. Colonization by arbuscular mycorrhizal fungi (AMF) and supply of phosphorus (P) fertilizer may affect the bioavailability of Se in soils and the absorption of Se by plants. To investigate the interaction between AMF and P fertilizer on the transformation of soil Se fractions and the availability of Se in the rhizosphere of alfalfa, we conducted a pot experiment to grow alfalfa in a loessial soil with three P levels (0, 5, and 20 mg kg-1) and two mycorrhizal inoculation treatments (without mycorrhizal inoculation [−AMF] and with mycorrhizal inoculation [+AMF]), and the interaction between the two factors was estimated with two-way ANOVA. The soil in all pots was supplied with Se (Na 2 SeO 3) at 1 mg kg-1. In our results, shoot Se concentration decreased, but plant Se content increased significantly as P level increased and had a significant positive correlation with AMF colonization rate. The amount of total carboxylates in the rhizosphere was strongly affected by AMF. The amounts of rhizosphere carboxylates and alkaline phosphatase activity in the +AMF and 0P treatments were significantly higher than those in other treatments. The concentration of exchangeable-Se in rhizosphere soil had a positive correlation with carboxylates. We speculated that rhizosphere carboxylates promoted the transformation of stable Se (iron oxide-bound Se) into available Se forms, i.e. exchangeable Se and soluble Se. Colonization by AMF and low P availability stimulated alfalfa roots to release more carboxylates and alkaline phosphatase. AMF and P fertilizer affected the transformation of soil Se fractions in the rhizosphere of alfalfa.

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Effect of phosphorus status of the soil on selenium availability

Cited by 39 publications

References 31 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

A consistent model for estimating the partitioning of Am, Pu and Se in agricultural soils

The Interaction of Arbuscular Mycorrhizal Fungi and Phosphorus Inputs on Selenium Uptake by Alfalfa (Medicago sativa L.) and Selenium Fraction Transformation in Soil

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