Abstract
This study investigated the dose and form of application of sodium selenate (Se) that allows the translocation and accumulation of this element in the edible fraction of potato. Concentrations of Se applied to the soil and leaves were evaluated considering the physiology, total antioxidant activity (TAA), agronomic attributes and Se content in tubers. The spatial distribution of Se was evaluated by X-ray fluorescence spectrometry microanalysis (μ-XRF). Soil application of Se did not significantly affect photosynthetic variables, TAA and yield attributes. However, foliar application caused phytotoxicity in the aerial part, at all doses tested, which reduced yield and caused losses of approximately 172.8 g of tubers per pot. Se content increased in tubers with increasing concentration of sodium selenate, regardless of the application form. μ-XRF analysis showed that Se uptake is not limited to the tuber peel. Potato plants translocated Se from the soil and leaves and accumulated this element inside the tubers. So, when Se is applied into the soil at 0.50 mg dm−3, potato plants accumulate it in the edible portion of tubers. Although foliar application resulted in accumulation of Se inside the tubers, caution is recommended in choosing the dose, due to the sensitivity of potato to this element.
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Abbreviations
- Se:
-
Selenium
- μ-XRF:
-
Microprobe X-ray fluorescence spectrometry
- A :
-
Carbon assimilation rate
- g s :
-
Stomatal conductance
- C i/C a :
-
Ratio of internal and external concentrations of CO2
- Fv/Fm:
-
PSII potential quantum yield
- TAA:
-
Total antioxidant activity
- ICP-OES:
-
Inductively coupled plasma atomic emission spectrometry
- LOD:
-
Limit of detection
- BG:
-
Background
- ROS:
-
Reactive oxygen species
- DW:
-
Dry weight
- DAE :
-
Days after emergence
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The financial support provided by the Coordination for the Improvement of Higher Education Personnel (CAPES), the National Council of Scientific and Technological Development (CNPq) and the Minas Gerais State Foundation for Research Aid (FAPEMIG) was greatly appreciated.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by VGN, LEV, LÂdA, RFN, MHFG, FSCS and HWPdC. The first draft of the manuscript was written by LEV and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Nasser, V.G., Visôtto, L.E., de Aquino, L.Â. et al. Efficiency of Application of Selenium in Biofortification of Potato Tubers (Solanum tuberosum). Potato Res. 66, 683–700 (2023). https://doi.org/10.1007/s11540-022-09595-4
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DOI: https://doi.org/10.1007/s11540-022-09595-4