Selenium uptake and species distribution in selenium-enriched bean (<Emphasis Type="Italic">Phaseolus vulgaris</Emphasis> L.) seeds obtained by two different cultivations |
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Authors: | Polona Smrkolj Marija Osvald Jo?e Osvald Vekoslava Stibilj |
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Affiliation: | (1) Jožef Stefan Institute, Ljubljana, Slovenia;(2) Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia |
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Abstract: | In this work, bean plants were cultivated in two different ways using two modes of selenium supplementation in the form of
sodium selenate. Each group consisted of the same four cultivars. Group A plants were grown in soil and twice foliarly sprayed
at an interval of 10 days with an aqueous solution of 10 mg Se L−1 at flowering time. Group B plants were hydroponically cultivated after the maternal seeds were soaked in nutrient solution
containing the same Se content as used for foliar fertilisation. Bean seeds obtained from group A plants accumulated much
more Se (around 2 μg g−1 dry weight) than those seeds obtained from group B plants (around 0.6 μg g−1 dry weight). No differences in Se content within each group were found. After enzyme hydrolysis, 85±7% of soluble selenium
was found in group A and 65±2% of soluble Se in group B with respect to the total Se content in seeds. In bean seed supernatants
SeMeSeCys, SeMet and two unknown species were found. These four species together represented 79±8 and 53±9% of the Se mass
fraction of group A and group B, respectively. No differences in the presence of selenium species were found between the four
cultivars and cultivation conditions. |
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Keywords: | Bean Uptake Selenium Speciation Selenium compounds |
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