FOLIAR BIOCHEMICAL PROFILES OF NEWLY INTRODUCED YELLOW MANGO CULTIVARS IN MEXICO

Elias Hernandez-Castro, Betsabe Piedragil-Ocampo, Agustin Damian-Nava, Antonio Mora-Aguilera, Abraham Monteon-Ojeda, Paul Garcia-Escamilla, Juan Elias Sabino-Lopez

Abstract


Background: mango is cultivated in most tropical and subtropical regions of the world, it is estimated that there are more than a thousand cultivars, so its regional characterization represents a priority in countries such as Mexico, which holds the first place for export. Objective: the objective of the present study was to identify biochemical characteristics (photosynthetic pigments, type and proportion of carbohydrates) of eight recently introduced cultivars and two new selections in Mexico. Methodology: by spectrophotometric analysis, the concentrations of total sugars, reducing sugars and starches were evaluated, as well as the content of chlorophylls a, b and carotenoids of the cultivars 'Nam Doc Mai', 'Rosygold', 'Mallika', 'Ivory', 'Alphonse', 'Neelum', 'Fairchild', 'Kesar', 'Ataúlfo Diamante' and 'Ataúlfo Zafiro'. Results: in the case of total and reducing sugars, the cultivars ‘Kesar’, ‘Nam Doc Mai’, ‘Ivory’, ‘Mallika’ and ‘A. Zafiro' (0.42, 0.34, 0.34, 0.33, and 0.32 mg*g-1 pf-1) presented the highest values (respectively), the starch content was very heterogeneous and 'Rosygold' (0.36 mg*g-1 pf-1) was identified as cultivar with higher levels. The results showed ‘Ivory’ (0.64, 0.59, 0.27 mg*g-1 pf-1) as the cultivar with the highest concentration of chlorophyll a, b and carotenoid photosynthetic pigments respectively. Based on the correlation analysis (r), a certain dependence could be observed between total and reducing sugars (r= 0.70), total sugars and starches (r= 0.76), reducing sugars and starches (r = 0.79). In the case of photosynthetic pigments, a close relationship between chlorophylls a, b and carotenoids was identified (r= 0.99); In the photosynthetic carbohydrate / pigment interaction, a significant correlation was observed between total sugars and chlorophylls a (r= -0.80), b (r= -0.80) and carotenoids (r= 0.82). The close relationship found between reducing sugars and chlorophyll a (r= 0.60), chlorophyll b (r= 0.99) and carotenoids (r= 0.99) stood out. Implications: it is necessary to continue the study in floral and fruiting stages to have a complete profile of the cultivars. Conclusion: these results will contribute in future agronomic studies of these varieties in the region in order to analyze their relationship with parameters such as yield and nutritional content of fruits.

Keywords


Mangifera indica L.; total sugars; reducing sugars; starches; photosynthetic pigments.

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URN: http://www.revista.ccba.uady.mx/urn:ISSN:1870-0462-tsaes.v23i2.3112



Copyright (c) 2020 BETSABE PIEDRAGIL-OCAMPO, AGUSTÍN DAMIÁN-NAVA, ELÍAS HERNANDEZ-CASTRO, ANTONIO MORA-AGUILERA, PAUL GARCÍA-ESCAMILLA, YURIDIA DURÁN-TRUJILLO, ABRAHAM MONTEON-OJEDA

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