Assay on the impact of seed priming with ionic selenium, nanoselenium and microselenium on early growth, biomolecules and nutrient content in cucumber seedlings
2025
Oscar SARIÑANA-ALDACO | Susana GONZÁLEZ-MORALES | Gregorio CADENAS-PLIEGO | Marissa PÉREZ-ALVAREZ | América Berenice MORALES-DÍAZ | Dámaris Leopoldina OJEDA-BARRIOS | Julia MEDRANO-MACÍAS | Adalberto BENAVIDES-MENDOZA
Selenium (Se) is a beneficial nutrient for plants and its application as seed priming is associated with positive effects on their growth. The use of Se occurs in ionic or nanometric form, however, another possible use is in micrometric form, which to our knowledge has not been studied in plants. The objective of the study was to evaluate the seed priming of cucumber (Cucumis sativus L.) with sodium selenite (Na2SeO3), nanoparticles (SeNPs) and Se microparticles (SeMPs) at concentrations of 0, 0.1, 0.5, 1.0, 1.5 and 3.0 mg L-1 of Se, for each of the mentioned forms. Growth, biomass, vigor, biomolecules and nutrients were evaluated in cucumber seedlings grown in a growth chamber for 15 days. The results showed increases in seedling length and biomass for all Se forms, which was reflected in increases in vigor indices from 21.42% to 27.72% for vigor index 1 (length) and from 16.96% to 34.5% for vigor index 2 (biomass), with SeMPs standing out at 1.0 and 1.5 mg L-1. Regarding pigments, variable effects were observed, where some treatments did not modify the concentration of chlorophylls and carotenoids (SeMPs) and others negatively affected (SeNPs and Na2SeO3). Reduced glutathione increased from 13.48% to 31.59%, with SeMPs standing out at 1.0 and 1.5 mg L-1. Phenols, flavonoids, proteins, S, K and Mg were also increased with the different Se materials; however, P, Ca, Fe, Zn, Cu and Mn decreased with some Se treatments. The results indicate that it is advisable to apply Na2SeO3, SeNPs and SeMPs, mainly SeMPs at 1.0 and 1.5 mg L-1.
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