In vitro flowering of Petunia × atkinsiana D. Don

The aim of this study was an attempt to determine the influence of PGRs - auxins, cytokinins and gibberellic acid - on the flowering and morphogenesis of ‘Flash Red’ Petunia × atkinsiana D. Don in vitro. The best results at the propagation stage were obtained on an MS medium supplemented with 0.5 mg dm^-3 GA₃. The petunia plants propagated under these conditions developed high main shoots and a large number of leaves and adventitious shoots. The plants with the best-developed root system were regenerated on an MS medium supplemented with 0.5 and 1.0 mg dm^-3 IAA. Flowering initiation should be performed using an MS medium supplemented with 0.5 mg dm^-3 KIN.