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Dozrávání rajčat z pozdních sběrů
Němec, Michal
In this diploma thesis "Ripening tomatoes from the late harvest" were investigated supporting options of the post harvest of the completely green fruit, which remained unharvested in the later stages of harvest. Fruits were transferred from the field conditions to the temperature of 20 °C and afterwards were successively treated with ethylene as the supportive maturing factor, which helped them to get to the suitable conditions for subsequent maturation. Two varieties of tomatoes were used for the speed of ripening. At the end of the cultivation period, both varieties of tomatoes 'Expres' and 'Premio' were treated by the three concentrations of exogenous ethylene, 2 100 ppm, 7 360 ppm and 2 200 ppm. Technologically important parameters such as the size and weight of fruit, fruit color, fruit firmness, soluble solids and titration acid were evaluated during the post-harvest storage (21 days). Influence of ethylene in concentrations up to 7 360 ppm has proven effective post-harvest treatment that supports ripening of originally unripe fruit at the end of the growing season. Also differences in the investigated varieties were proved, the 'Premio' variety was after the ethylene treatment sensitive in parameters, which were monitored.
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