The GAs have long been used in horticultural practice as growth regulators for crop improvement. Insignificant effects and lack of toxicity allows a wide range of applications in several cultivated species, e.g. increasing stem elongation and bract size or colorization (Blanchard and Runkle, 2008) and seedless fruit production
(Retamales et al., 1998). In woody angiosperms flowering is generally associated with reduced stem elongation. It may be proposed that the role of GAs in flowering of different plant groups reflect the relationship between stem elongation and flowering (Goldschmidt,1998).