Changes in the biotechnological potential of potatoes during storage

Abstract

The influence of the traditional method of storing potato varieties, namely Gala, Colombo, Red Scarlett, grown in the Southern Federal District, on its biotechnological potential was studied. It was determined that in the tubers of the Gala varieties the dry matter content was – 25.20%, in Red Scarlett – 22.6%, the ratio of protein and starch in the tubers of the Gala varieties (1: 11.1) and Red Scarlett (1: 10.7), which indicated their good technological properties. The Colomba variety had a dry matter content below 20%, and the protein to starch ratio also had a lower value (1: 9.3). Protein losses during storage amounted to, in varieties of , in%, Gala – 7.5; Colomba – 9.2; Red Scarlett – 4.9; starch loss – 10.9; 8.8; 17.8 respectively. The mass fraction of reducing sugars decreased in all potato varieties, in%: Gala – by 39.4; Colomba – at 67.7; Red Scarlett – at 55.0. The loss of vitamin C during storage was, in varietiesof, in% Gala – 23.8; Colomba – 26.8; Red Scarlett – 33.3. It was determined that potato tubers contained a level of nitrates that was acceptable for food raw materials and food products, while their content decreases during storage. Nitrate losses were, in varieties, in%, of Gala 57.1; Colomba 49.0; Red Scarlett 54.6. Changes in the physical and chemical properties of potatoes after storage indicate the preservation of the biotechnological potential of the raw material and the possibility of its use in public catering establishments. The Gala variety of potatoes is universal for processing in catering establishments; it is suitable for use in dishes (boiled, fried, baked), preparing multifunctional semi-finished products (for salads, soups), chips, crispy potatoes, etc.