Comparison of in vitro callus induction between Rosa damascena and Rosa alba

V. Badzhelova*

Institute of Roses, Essential and Medical Cultures, 6100 Kazanlak, Bulgaria

(Manuscript received 13 June 2022; accepted for publication 20 February 2023)

Abstract. The potential for callus induction in the local population of Rosa damascena and Rosa alba was studied, and the influence of the different compositions of the main nutrient media and the hormones added to them was established. The results show that the induction and proliferation of callus mass are highly dependent on both the type of nutrient medium and the genotype. The highest total number of responding explants was obtained in Rosa alba, respectively 423 of 720 pre-placed and the highest percentage of explants that formed callus in both genotypes were reported on nutrient medium A24 – from 95% in Rosa damascena to 100% in Rosa alba