Efeito dos compostos derivados do esteviol, na micropropagação de videira

Abstract

Stevioside derivatives have chemical structure similar to that of gibberellins is expected that they can produce similar effects. Studies show that diterpene glycosides, stevioside derivatives induce favorable physiological activities such as promotion of growth and acceleration of flowering, seed dormancy breaking, germination stimulation and increase in fruit production. This study aimed to determine the effect of stevioside derivatives in micropropagation of grapevine cuttings of cv. Bordeaux (Vitis labrusca) in vitro. The treatments consisted of MS medium supplemented with five concentrations of seven derivatives steviosides (Steviol, isosteviol, the oxime isosteviol Ipóxido the Steviol, 17 isosteviol hydroxy-, oxime, and the 17OH OH isosteviol 16.17), five concentrations of GA3 and control. The experimental design was completely randomized with four replications, each experimental unit consisted of four vials containing four plants each. The parameters evaluated were: number of microcuttings, average length of shoots (cm), leaf number, number of roots, main root length (cm) and fresh weight (g).