PRELIMINARY DATA OF THE IN VITRO CULTURE RESPONSE OF ROSA CANINA L. SPECIES

The in vitro cultures of Rosa canina L. were initiated starting from shoot tips harvested during various periods of the vegetative season. The first observations ascertained that the offshoots cut off at the beginning of July offred a best in vitro response, and the MS medium supplemented with BAP (1.0 mg/l) and IBA (0.5 mg/l) induced both the multiple shooting and the formation of callus surrounding the shoots’ base. Some of the shoots provided roots on this medium formula (sporadically). The hormone-free MS medium stimulated the rooting of the shoots, and scarcely the production of callus at the stem base. The future tests aim to fiind out the best medium variants to enhance the direct caulogenesis, the rooting of the in vitro shoots, and the survival of the regenerants during the ex vitro environment.