Nutritional, phytochemical, and bioactive prospects of black chokeberry (Aronia melanocarpa)and saskatoon berry (Amelanchier ovalis) grown in the Republic of Kazakhstan

•Chocoberry and saskatoon berry from Kazakhstan were characterized.•They were rich in sugars and organic acids.•20 phenolics were determined in A. melanocarpa, 25 in A. ovalis.•Hydroethanolic extracts showed antioxidant and antibacterial properties.•The data highlighted the value of these Kazakhstan-originating berries.