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Revista Ceres

Print version ISSN 0034-737X

Abstract

GIOVANAZ, Marcos Antônio et al. Effect of plant growth regulators on production and quality of Jubileu peaches. Rev. Ceres [online]. 2014, vol.61, n.4, pp.552-557. ISSN 0034-737X.  https://doi.org/10.1590/0034-737X201461040015.

This study aimed to evaluate the yield, return of flowering and physico-chemical fruit quality of peaches after using Promalin® (BA + GA4+7) at different doses and time of application. The experiment was conducted at Agricultural Center of Palma on Pelotas Federal University, Capão do Leão - RS, in 2012. Peach trees of cultivar Jubileu, 13 years old, grafted on Capdeboscq rootstock, at a density of 1.481 plants ha-1 were evaluated. The treatments consisted of: plants without application (control), plants treated with benzyladenine (BA) + gibberellin (GA4+7) at the doses 50 and 100 mg L-1, applied at 10 and 30 days after full bloom (DAFB) . We evaluated the tree yield, return of flowering and physico-chemical quality of fruit. Application of plant growth regulator at 30 DAFB resulted in increase of 6.62 kg per tree and fruits of larger caliber (> 65 mm), but no significant difference was found between the doses 50 mg L-1 and 100 mg L-1. Regardless of the doses used in this study, the time of application (30 DAFB) was the main factor for the efficiency of the growth regulators in increasing the production per tree, average mass, diameter and pulp firmness of Jubileu peaches . The total number of flowers was reduced with the application of BA + GA4+7.

Keywords : Prunus persica; Promalin®; cell division; gibberellins; cytokinins.

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