Effect of Selenium Form and Salicylic Acid on the Accumulation of Selenium Speciation Forms in Hydroponically Grown Lettuce

Iwona Kowalska, Sylwester Smoleń, Małgorzata Czernicka, Maryia Halka, Kinga Kęska and Joanna Pitala
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Iwona Kowalska: Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, 29 Listopada 54, 31-425 Kraków, Poland
Sylwester Smoleń: Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, 29 Listopada 54, 31-425 Kraków, Poland
Małgorzata Czernicka: Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, 29 Listopada 54, 31-425 Kraków, Poland
Maryia Halka: Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, 29 Listopada 54, 31-425 Kraków, Poland
Kinga Kęska: Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, 29 Listopada 54, 31-425 Kraków, Poland
Joanna Pitala: Laboratory of Mass Spectrometry, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, 29 Listopada 54, 31-425 Kraków, Poland

Agriculture, 2020, vol. 10, issue 12, 1-20

Abstract: Selenium (Se) uptake by plants depends on its form and salicylic acid (SA) can increase the efficiency of plant biofortification in Se. This study investigated the effects of selenite (Na 2 SeO 3 ) and selenomethionine (SeMet) applied individually or together with SA on a total content of Se, Se speciation forms, yield and content of sugars and ascorbic acid of lettuce, as well as activity of selenocysteine methyltransferase ( smt ) and methionine methyltransferase ( mmt ) genes of the Se metabolic pathway. Lettuce was grown in the nutrient film technique (NFT) system. Se and SA were used at doses of 0.5 and 10.0 mg dm −3 of the nutrient solution, respectively. The treatments were: 1. control, 2. Na 2 SeO 3 , 3. Na 2 SeO 3 + SA, 4. SeMet, 5. SeMet + SA, 6. SA. Se was accumulated more in the roots than the leaves. SeMet was more effective in biofortification than Na 2 SeO 3 . SA enhanced Se uptake, especially organic Se. Plants supplied with SeMet alone or SeMet + SA accumulated in their leaves mainly SeMet and methylselenocysteine (MeSeCys), while those treated with Na 2 SeO 3 or Na 2 SeO 3 + SA accumulated MeSeCys and selenite (SeO 3 −2 ). The roots showed no expression of smt , while the expression of two mmt genes was independent of either Se or SA. The leaves of plants supplied with Na 2 SeO 3 demonstrated the strongest expression of mmt and smt .

Keywords: selenite; organic selenium; biofortification; smt; mmt (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
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