Effect of drought and waterlogging on saccharides and amino acids content in potato tubers

The study was focused on the effect of drought and waterlogging stresses in two-year pot experiments peat substrate content glucose, fructose sucrose free amino acids potato tubers four cultivars (yellow-fleshed Laura, Marabel, Milva blue-fleshed Valfi) after 71 days exposure to conditions (BBCH 909). Drought increased levels fructose, three except for cv. Laura. stress l-proline (+248.4%), l-hydroxyproline (+135.3%), l-arginine (+29.97%), l-glutamic acid (+29.09%) l-leucine (+22.58%) contents all analysed cultivars. Moreover, high an increase l-phenylalanine, l-histidine, l-threonine, total cvs. Valfi Marabel has been observed. A comparison effects showed under a decrease conditions. On average, cultivars, caused l-tyrosine content, whereas decrease. In addition, significant while its Obtained results confirmed different responses susceptible or resistant abiotic stresses.