Salinity tolerance improvement of in vitro propagated Paulownia tomentosa using proline

Abstract

For in vitro propagation behavior, the best results for both shooting and rooting behaviors were obtained when MS culture medium was supplemented with BA at 0.2 mg/l, and Kin and IBA at 0.1 mg/l. For the improvement of the in vitro propagation ability under salinity stress, the survival was 100% when the shootlets of Paulownia grown on MS culture medium supplemented with 0.5 g NaCl plus 0.2 or 0.4 g/l proline and 1 g NaCl plus 0.2 g/l proline which were similar to control treatment.