The highest frequencies of callus induction (100%) and shoot regeneration (70%, with
7.2 shoots/callus) were found in the crocus species Crocus oliveri ssp. Oliveri, using the MS medium
containing 5% (w/v) sucrose supplemented with (4 mg/L NAA + 4 mg/L TDZ) and (2 mg/L IAA + 2 mg/L
TDZ + 2 mg/L BAP).