Abstract

ZACCARI, Fernanda; PUERTO, Marta Del; VIGNALE, Beatriz  and  PRITSCH, Clara. Colorimetric Parameters and Pigments Content in Five Different PeelColors of Feijoa Fruit [Acca sellowiana (Berg) Burret]. Agrociencia Uruguay [online]. 2017, vol.21, n.2, pp.23-30. ISSN 1510-0839.

The aim of this study was to characterize five guava fruit peel color on a visual scale used in the selection and breeding of thisspecies in Uruguay by the colorimetric parameters in the CIELAB color space and measure total chlorophyll, chlorophyll a,chlorophyll b and total carotenoids content. The visual scale analyzed the skin colour ranked of Yellow (A), Green (AV) GreenYellow (VA), Green (V) and Green Green (VV). The brightness and saturation of the skin fruit colour, lowered by increasing thegreen colour of the visual scale (L* 57.2 to 36.4, Cab* 41.4 to 15.9). The tones were 90.4 to 121.3 ºhab coincident with perceivedin the skin visual scale colour categories A to VV. The color difference between categories of visual scale was easilydifferentiated by a non-expert observer. The color index statistically discriminated the five skin colour which values were 0 (A)-4 (AV), -5 (VA), -12 (V) and -17 (VV). The total chlorophyll content (0.160 to 0.119 mg g-1 fresh weight) and 0.085 to 0.362mg g-1 fresh weight chlorophyll a, was positively correlated with the colours toward skin greenish- (r = 0.56 and 0.80; p ≤105).Instead, total carotenoids (0.043 to 0.119 mg g-1 fresh weight) had low relation with the visual scale (r = -0.03; p 0.225), probablymasked for chlorophylls, also with the highest content in skin VV fruits.

Keywords : fruit; exocarp; colour index; visual scale; chlorophylls.

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