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Ciência e Agrotecnologia
On-line version ISSN 1981-1829
MIELKE, Erica; CUQUEL, Francine Lorena; KOEHLER, Henrique Soares and GEISS, Jonas. Flowering induction of cyclamen plants after applying GA3. Ciênc. agrotec. [online]. 2008, vol.32, n.1, pp. 87-92. ISSN 1981-1829. http://dx.doi.org/10.1590/S1413-70542008000100013.
Brazilian floriculture has demonstrated to be an economical alternative as agricultural crop. One of the difficulties for the expansion of this local activity is the low consumption of these products by Brazilians, which may be partially explained by its high cost. Plant growth regulators might reduce this cost and increase quality. Cyclamen (Cyclamen persicum Mill.) is an ornamental plant cultivated in vase with high production cost. The aim of this trial was to evaluate the effects of gibberellic acid (GA3) on the cyclamen flowering. It was performed in a grower, located in Quatro Barras, Paraná State, Brazil. Two cyclamen cultivars were evaluated, Concerto Scarlet 'Caruso'™ and Concerto Purple 'Papagenoa'™, with GA3 at 0, 15, 30, 45 and 60 mgL-1. Better results were observed for Concerto Scarlet 'Caruso'™ with 45 mgL-1 and Concerto Purple 'Papagenoa'™ with 30 mgL-1 of GA3. Both cultivars showed fitotoxic effects at 60 mgL-1 of GA3.
Keywords : Plant growth regulator; gibberellin; gibberellic acid; ornamental plant; Cyclamen persicum.