Color variation in the apex of the avocado fruit (Persea americana Mill.) cv. ‘Hass’as harvest index
DOI:
https://doi.org/10.21704/pja.v7i2.2020Keywords:
Maturity, lenticellar coverage, dry matter, harvestinAbstract
The objective of this investigation was to establish as a harvest index in avocado fruits cv. Hass the changes in pigmentation and color at the level of the apex of the fruit. For this, from week 23 after maximum flowering to week 29, 30 fruits by week of similar and homogeneous conditions were taken from panicles previously marked at the beginning of flowering were analyzed. Changes in pigmentation and color on the apex side of the fruit were evaluated through the chromatic parameters L*, a*, b*, C*, h°, and the color index (CI) was estimated. of avocado maturity (AMI) the concentration of chlorophylls a, b and total and the quantification of the percentage of lenticellar coverage (LC) all of which were related to the percentage of matter of the apical (DMA), central (DMC) and basal sides. (DMB) of the fruit. The results had statistical differences between the color parameters and the dry matter of the fruit but with low correlation and determination coefficients. The h° hue was the only chromatic parameter that had a better relationship with the percentage of dry matter (r= -0.42). The behavior of the lenticellar coverage with respect to the weeks of evaluation and the percentage of dry matter of the fruit are explained through a third-degree polynomial curve with relationship coefficients (R2=0.97) and (R2=0.84) respectively. This would make it possible to estimate based on the percentage of lenticellar coverage of the apex of the avocado cv. Hass the percentage of dry matter of the pulp, the lenticellar coverage must be at least 6.7 % to ensure a percentage of dry matter (22 %) ideal to start the fruit harvest. Regarding the concentrations of chlorophyll a, b, and total, these did not present differences or variations in the apex side of the fruit.
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