Development of Future’s Two Model Plant (Lettuce and Potato) in Diluted Seawater In Vitro and In Vivo Conditions

97 percent of all waters is salt water consisting of sea and oceans. Lettuce, which is a leafy vegetable plant which is very quickly consumed and potato consumed very much, can be used as a future’s model plant. Five different seawater concentrations (0%, 5%, 10%, 20%, 40%) were used in both lettuce and potato. The seedlings belonging to the curly lettuce Fiyonk were planted in pots and were irrigated with water containing different seawater concentrations when they reached 2-3 real leaf stages. In potato plants grown in tissue culture, MS media containing five different seawater concentrations were prepared and the growth status of the plants as a result of 45 days growth periods was investigated. According to the results of the study, 5 % (EC 3.2 dS m-1) and 10 % (EC 6.6 dS m-1) lettuce irrigated with seawater showed better plant growth. In potato, the best development was obtained by 5 % seawater application in Agria variety and by 10 % seawater application in 22-99-33. In controlled conditions, up to 15 % of seawater can be used successfully in lettuce. Culture containing 10 % (EC 6.4 dS m-1) seawater in potato increased the plant growth, and the number of nodes compare to control in tissue culture propagation.