Resumo

LAITON P., GIOVANNI ADRIÁN; ALMANZA-MERCHAN, PEDRO JOSÉ  e  BALAGUERA-LOPEZ, HELBER ENRIQUE. Yield and postharvest quality of long life tomatoes (Solanum lycopersicum L.) submitted to an application of gibberellic acid. rev.colomb.cienc.hortic. [online]. 2012, vol.6, n.2, pp.183-195. ISSN 2011-2173.

The objective of this research was to evaluate the effect of an exogenous application of gibberellic acid on production and postharvest quality of the tomato hybrid: Ichiban. A completely randomized design with six treatments for different doses of gibberellic acid (0, 1, 10, 100, 1,000 or 10,000 mg L^-1) was used. The gibberellic acid was applied in a localized manner at the time that each cluster had its fruits formed, therefore, eight applications were done (eight clusters/plant), but each fruit received one application. At the time of harvest, production was measured, along with the postharvest behavior for 21 days. The results showed that an application of 100 mg L^-1 gibberellic acid resulted in increased production of extra quality, first; a considerable overall yield and a low production of quality corresponding to fruits of smaller sizes (fourth, third and second), which makes it the most favorable dose, producing larger fruit. The dose of 10,000 mg L^-1 gibberellic acid is not conducive to tomato production because it generated the lowest total production, extra, first; and high yields of lower quality fruit (third and fourth). The application of gibberellic acid did not produce a negative effect on postharvest quality of tomato fruits; and did not significantly change weight loss, total soluble solids or firmness of the tomato fruits.

Palavras-chave : weight loss; total soluble solids; firmness.

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