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Will selenium increase lentil (Lens culinaris Medik) yield and seed quality?

Dil Thavarajah, Pushparajah Thavarajah, Eric Vial, Mary Gebhardt, Craig Lacher, Shiv Kumar, Gerald F. Combs
Frontiers in plant science 2015 v.6 no.356 pp. -
Lens culinaris, application rate, atomic absorption spectrometry, biomass, chromatography, fertilizer application, foliar application, grain yield, lentils, seed quality, seed yield, seeds, selenium, selenocysteine, selenomethionine, soil, soil treatment, varieties, wet digestion method, South East Asia
Lentil(Lens culinaris Medik), a nutritious traditional pulse crop, has been experiencing a declining area of production in South East Asia, due to lower yields, and marginal soils. The objective of this study was to determine whether selenium (Se) fertilization can increase lentil yield, productivity, and seed quality (both seed Se concentration and speciation). Selenium was provided to five lentil accessions as selenite or selenite by foliar or soil application at rates of 0, 10, 20, or 30 kg Se/ha and the resulting lentil biomass, grain yield, seed Se concentration, and Se speciation was determined. Seed Se concentration was measured using inductively coupled plasma optical emission spectrometry (ICP-OES) after acid digestion. Seed Se speciation was measured using ICP-mass spectrometry with a high performance liquid chromatograph y(ICP-MS-LC) system. Foliar application of Se significantly increased lentil biomass (5586vs.7361kg/ha),grain yield (1732vs.2468kg/ha),and seed Se concentrations(0.8vs.2.4μg/g) compared to soil application. In general, both application methods and both forms of Se increased concentrations of organic Se forms (selenocysteine and selenomethionine) in lentil seeds. Not surprisingly, the high yielding CDC Redberry had the highest levels of biomass and grain yield of all varieties evaluated. Eston, ILL505, and CDC Robin had the greatest responses to Se fertilization with respect to both grain yield, seed Se concentration and speciation; thus, use of these varieties in areas with low-Se soils might require Se fertilization to reach yield potentials.