Resumo

TREJO-TELLEZ, Libia Iris; GOMEZ-MERINO, Fernando Carlos; GOMEZ-PEREZ, Valeria  e  CASTRO-GARCIA, Flor de Azalea. Cobalt in postharvest of gladiolus (Gladiolus grandiflorus Hort.). Rev. Mex. Cienc. Agríc [online]. 2014, vol.5, n.spe9, pp.1575-1587. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v0i9.1049.

In this research, the effect of cobalt (Co) was evaluated in different concentrations (0, 0.3 and 0.6 mM) in variables postharvest of gladiola evaluated (Gladiolus grandiflorus Hort.) Cv. Borrega Roja. For seven days, we evaluated the water uptake through the floral stems and the variation in their weight, as well as the kinetics of opening of the flowers constituting each inflorescence. After seven days of treatment, the weight of dry matter per organ (stem, leaves and inflorescence) and concentration was evaluated and N content per organ; concentration of chlorophyll a, b and total. A significant increase was observed in the water absorption in flower stems treated with both concentrations of Co, compared with the control after 144 h after the start of the treatment; also in this sample, the lowest percentage of weight loss was recorded in fresh rods treated with 0.3 mM; however, this was not statistically different to other treatments. The low concentration of Co significantly increased N content in stems and leaf concentration of chlorophyll. Co had no influence on the kinetics of foliar opening and N concentration per organ. The total dry weights of leaves and stems were higher with the treatment of 0.3 mM Co.

Palavras-chave : dry matter; nitrogen partition; post-harvest quality; photosynthetic pigments.

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