Affiliation:
1. Department of Plant Biology and Food Sciences, Vytautas Magnus University Agriculture Academy, 44001 Kaunas, Lithuania
Abstract
Studies on the mineral and vitamin C contents of different species and ripening stages of Solanum fruits are very limited. The aim of the research was to evaluate the content of the mineral elements and vitamin C of four different Solanum species (S. melanocerasum—SM, S. nigrum—SN, S. villosum—SV and S. retroflexum—SR), and three ripening stages. The mineral composition of Solanum fruits was detected using a CEM MARS 6® (Matthews, NC, USA) digestion system outfitted with a 100 mL Teflon vessel, by microwave-assisted extraction (MAE). In total, eleven mineral elements were detected (K, Ca, Mg, P, Fe, Na, Cu, B, Mn, Al, and Zn). Vitamin C content was assessed by a spectrophotometric method. Depending on the ripening stage/species, content of microelements ranged from 756.48 mg kg−1 DW in SV fruits at ripening stage III, to 211.12 mg kg−1 DW in SM fruits at ripening stage III. The dominant microelement was Fe. The total content of macroelements in Solanum fruits ranged from 26,104.95 mg kg−1 DW in SV fruits at ripening stage II to 67,035.23 mg kg−1 DW in SR fruits at ripening stage I. The dominant macroelement was K. The data from two experimental years showed that the significantly highest content of vitamin C was in SM fruits and ranged from 48.15 mg 100 g−1 at ripening stage I to 45.10 mg 100 g−1 at ripening stage III.
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