Low molecular weight carbohydrates from potato(Solanium tuberosum)

Abstract

An investigation was made of the low molecular weight carbohydrates of potato, Netted Gem variety. The material soluble in 80% alcohol was fractionated and separated by a combination of charcoal–Celite column and paper chromatography. Fifteen major components were isolated and characterized, and five minor components were detected. The major components were galactose, glucose, fructose, myoinositol, and eleven oligosaccharides, namely, sucrose, melibiose (Galp 1 → 6 Gp), maltotriose (Gp 1 → 4 Gp 1 → 4 Gp), digalactosyl glycerol (Galp 1 → 6 Galp, 1 → 1 Glyc), glucosyl → myoinositol, raffinose (Galp, 1 → 6 Gp 1 → 2 Fruf), planteose (Galp, 1 → 6 Fruf 2 → 1 Gp), galactinol (D-1-O-α-D-galactopyranosyl-myoinositol), manninotriose (Galp 1 → 6 Galp, 1 → 6 Gp), stachyose (Galp 1 → 6 Galp 1 → 6 Gp, 1 → 2 Fruf), and trigalactosyl glycerol (Galp 1 → 6 Galp 1 → 6 Galp 1 → 1 Glyc). The five components detected in small amounts were: three disaccharides, ribosyl-glucose, xylosyl-glucose, and arabinosyl-glucose, and two trisaccharides both made up of fructose and glucose units in the ratio of 2:1.