Abstract

PEREZ BARRAZA, María Hilda et al. Mango growth regulators: their relationship with carbohydrates number and size of cells. Rev. Mex. Cienc. Agríc [online]. 2017, vol.8, n.spe19, pp.3855-3868. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v0i19.655.

Growth regulators increase fruit size by modifying the distribution pattern of photosynthates, or by increasing the number and size of cells. The objective was to determine the effect of growth regulators on the accumulation of sugars and on the number and size of cells in ‘Ataulfo’ mango. The treatments were: T1 application of 50 mg L-1 of TDZ at 0 days after full bloom (DDF) combined with three applications ofAG3 (50 mg L-1) at 15 + 30 + 45 DDF. The T2 corresponded to the application of TDZ + AG3 (50 mg L -1 of c/u) at 15 + 30 + 45 + 60 DDF. The T3 Witness. The experimental design was completely randomized, three treatments with four replications and one tree as a useful plot were evaluated. The variables evaluated were fruit length and diameter, carbohydrate content, number and size of cells. It was possible to increase fruit size up to 20% with T1 and 23% with T2, with respect to the control. The sugar content was similar in fruits with or without growth regulator. At 45 DDF, the number of cells ranged from 3 526 to 4 603 mm2, T1 had the highest number but was statistically equal to that found in T2. At T2 the cell size increased 30%, in relation to the control and 23% with respect to the fruits of T1. The increase in parthenocarpic fruit size was associated with greater cell division and elongation. The pollinated fruits had larger cells than the parthenocarpic ones.

Keywords : Mangifera indica L.; cell size; cytokinins; fruit growth; gibberellins; sugars.

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