Abstract
ABSTRACT: The gabirobeira is a species native to the Brazilian Cerrado with potential for use in cropping systems. This study evaluated the effect of the cytokinin 6-benzylaminopurine (BAP) on root cuttings of gabirobeira (Campomanesia adamantium). The plant material was obtained from gabirobeira progenies of one and two-years-old. The cuttings were segmented in 5 cm length and 1.90 to 3.22 mm diameter, immersed in the following BAP concentrations: 0.0; 1.0; 2.0 and 4.0 mg L-1 for 15 seconds and planted in trays containing the substrate Bioplant®. A complete randomized experimental design was adopted in a factorial scheme 2x4, (cuttings age x BAP concentrations) with fifteen replicates per treatment. After 140 days the number of cuttings with shoots, number of shoots, number of leaves, and diameter of the main root were evaluated. The better development of the cuttings was observed on progenies of two-years-old. The lowest cytokinin concentrations promoted the better emission and number of shoots of the progenies from both ages.
Highlights
RESUMO: A gabirobeira é uma espécie nativa do Cerrado brasileiro com potencial para uso em sistemas de cultivo
It is known that the age of the cuttings influences the propagation due to the variation in the hormonal concentration, in the carbohydrate reserve and the degree of lignification of the vegetative material (ROSA et al, 2017), this study aimed to evaluate the effect of the cytokinin 6-Benzylaminopurine (BAP) in root cuttings of C. adamantium obtained from progenies of one and two-years-old
The increase in BAP concentrations is responsible for the reduction in the number and size of the plant structures since high concentrations can repress vegetative growth (MEGHWAL et al, 2010), this behavior could be observed in figure 2, in which the highest concentrations did not allow the development of the root cuttings
Summary
RESUMO: A gabirobeira é uma espécie nativa do Cerrado brasileiro com potencial para uso em sistemas de cultivo. It is known that the age of the cuttings influences the propagation due to the variation in the hormonal concentration, in the carbohydrate reserve and the degree of lignification of the vegetative material (ROSA et al, 2017), this study aimed to evaluate the effect of the cytokinin 6-Benzylaminopurine (BAP) in root cuttings of C. adamantium obtained from progenies of one and two-years-old.
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