Physiological behavior of three ethnovarieties of cocona (Solanum sessiliflorum Dunal) fruit grown in different Amazonic environments during development and ripening
The physical and chemical parameters of three cocona ethnovarieties (Solanum sessiliflorum Dunal) growing in two Amazonian landscapes (dissected Amazon floodplain and floodplains) were studied during fruit development and ripening (70 days after anthesis). The fruit ripening period occurred between 56 and 70 days after anthesis. During this period, a non-climacteric behavior was detected due to undetectable levels of ethylene and a constant respiration rate, which were accompanied by a steady increase in sugars and acid. Only firmness, total soluble solids, acidity, and concentration of sugars (glucose, fructose and sucrose) and organic acids (oxalic, citric and malic) were affected by the ethnovariety × environment interactions. The fruits grown in the fertile valley of the floodplains presented superior quality as evidenced by typical traits of ripe fruit (i.e., higher soluble solids and sucrose levels) than those observed in the fruit grown on the dissected Amazon floodplain. The canonical discriminant analysis allowed for finding large differences between the ethnovariety patterns during ripening. Particularly, the big round ethnovariety grown on the floodplains was the most different of the studied ethnovarieties. The ovoid and small round ethnovarieties showed distinct groups irrespective of the considered environment.
Cardona, J.E.C., Barrera, J.A., Carrillo, M., Hernández, M.S., Martínez, O., Cuca-Suarez, L.E. and Fernández-Trujillo, J.P. (2016). Physiological behavior of three ethnovarieties of cocona (Solanum sessiliflorum Dunal) fruit grown in different Amazonic environments during development and ripening. Acta Hortic. 1130, 377-384
acidity, sugars, respiration rate, fruit morphology, fruit growth modeling