The present work was carried out in the Tissue Culture Laboratory EMBRAPA/CPACT, Pelotas-RS, with the objective of verifying the behaviour in vitro of two cultivars of strawberry on different MS medium concentration. Strawberry explants, Hofla and Tangi cultivars coming from in vitro culture were tested on MS medium in the full, 3/4 and 1/2 strength suplemented with 30g/l sucrose, 100mg/l myo-inositol and 0.005mg/l benzylanimopurine (BA). Flasks (250ml) containing 40ml of medium culture with five explants per flasks were used. Cultures were maintained in a growth room at 25°C with a photoperiod of 16 h at 1.5 Klux for 32 days. Results indicated that the reduction in MS salts improved rooting explant by increasing the number of roots of the Tangi cultivar. A large root length was obtained with the Hofla cultivar in the 3/4 and 1/2 MS concentration. It was not observed any difference in the development of the plantlets among the cultivars due to the reduction in MS salts.
strawberry; (Fragaria x ananassa Duchesne); tissue culture; culture medium
