Abstract:

This study was carried out to determine the effects of methyl jasmonate (MeJA) sprayed in different concentrations (1120 and 2240 mg L-1) on the fruit pre-coloration (Prunus domestica) and the different time of harvest on the physical, mechanical and chemical characteristics of the fruit. The lowest geometric diameter, globality and surface area values were observed in the 1120 mg L-1 MeJA application. Geometric average diameter, globality, surface area, fruit mass, fruit volume, fruit volume weight and mass volume weight values have given higher results than other harvest periods in September 4. The b* and C* color characteristics of the MeJA applications are increasing depending on the harvest period, while the h° color characteristics are reduced. The fruit seed break resistance tends to decrease with increased MeJA doses, while the fruit seed break strength, the fruit hardness values with M/FRF values, in MeJA 2240 mg L-1, were found higher than the other MeJA doses. With regard to the MeJA applications and harvest periods, rubber and laminate harvesting surfaces have given the maximum and minimum harvesting rate values respectively. The pH and TA values, along with the MeJA applications, and the water-soluble dry substance (SCHM) values have generally increased. Therefore, for post-collection technological applications such as transportation, processing, storage and packaging systems, it should be designed taking into account the physical, mechanical and chemical properties of the grape.

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