Multiplicação in vitro de Codonanthe devosiana

Abstract

Codonanthe devosiana is a species endemic to Brazil belonging to the family Gesneriaceae. It features ornamental potential for use in hanging pots and shaded environments. The aim is to evaluate the effects of the combination of different concentrations of BAP and GA3 on the multiplication and development of in vitro explants of C. devosiana. We used MS media supplemented with concentrations of 0.0, 0.2 and 0.4 mg L-1 of BAP and 0.0, 0.25 and 0.50 mg L-1 of GA3 . The number, bud dry matter and height, callus dry matter and presence of roots were evaluated in agglomerates with multiple buds. The interaction between BAP and GA3 concentrations was verified for number of shoots, shoot dry matter and callus dry matter. For shoot height and root formation, only BAP concentrations were observed. The highest number of shoots (4.8) occurred when combined with the concentration of BAP 0.2 mg L-1 and 0.5 mg L-1 GA3 . The lowest shoot height was observed without the use of BAP, as well as the greatest rooting. It is concluded that the combination of 0.2 mg L-1 of BAP with 0.5 mg L-1 of GA3 allows for a more efficient multiplication of C. devosiana explants