Flower production of Gerbera jamesonii cv. Dream as a function of gibberellic and salicylic acids

E Morales-Pérez, EJ Morales, O Franco-Mora, D de Jesús Pérez-López, A González-Huerta, E Urbina-Sánchez

Abstract


The aim of this study was to assess different doses of gibberellic and salicylic acids for the production of flowers on Gerbera jamesonni after applications to their foliage or substrate under greenhouse conditions. The ten treatments (growth regulators) were evaluated in a 10 x 2 factorial experiment in a randomized complete block design with four replications. When F values were significant, the honestly significant difference test (HSD) at the 5% level of significance was used. The principal components analysis was also used to study the interrelationship among the ten treatments and the two forms of application (foliar or substrate). The results observed in the biplot indicated that the largest original variation in the data was adequately represented in the first two principal components since both accumulated 96.7%. In the reference biplot, an increase in the number of floral stems per plant was directly related to a decrease in the diameter of the capitulum, and length and diameter of the floral stems. In this sense, after observing the interrelationships among the 20 combinations, it was found that the foliar application favored the number of floral stems per plant, while the application to the substrate increased the diameter of the capitulum, and the length and diameter of the floral stems.

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Phyton. International Journal of Experimental Botany. ISSN print 0031-9457 ISSN en line 1851-5657 Fundación Rómulo Raggio Gaspar Campos 861,  Vicente López, Buenos Aires, Argentina (C.P. 1638) Tel 54 11 4791-0868 / 4796-1456 revistaphyton@fund-romuloraggio.org.ar www.revistaphyton.fund-romuloraggio.org.ar