Dynamic Controlled Atmosphere Isolated or Associated with 1-MCP and Elevated Storage Temperature Affect the Overall Quality and Anaerobic Metabolism of ‘Royal Gala’ Apples

Weber, Anderson; Soldateli, Francis Júnior; Thewes, Fábio Rodrigo; Both, Vanderlei; Brackmann, Auri

doi:10.1007/s10341-023-00871-2

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“…Despite the importance in slowing down the ripening effect, the storage of ‘Gala’ fruits under a controlled atmosphere (CA), in dynamic controlled atmosphere (DCA), under extreme low oxygen (ELO) associated with low O 2 hysteresis (HY), or with the ethylene action inhibitor, 1-methylcyclopropene (1-MCP) has been shown to decrease volatile production [ 16 , 17 , 18 , 23 , 24 , 25 , 26 , 27 ] and other ‘Gala’ fruit attributes [ 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. It is nevertheless important to mention that the degree of this decrease is dependent on the overall conditions of storage (CO 2 , O 2 , N 2 , temperature, period stored), as well as from the fruit cultivar and fruit maturity at harvest [ 16 , 17 , 18 , 23 , 24 , 25 ].…”

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confidence: 99%

Effects of Different Irrigation Regimes, Nitrogen Levels and Storage Conditions on Volatiles of ‘Gala’ Apple

Tavares,

Rodrigues,

Gonçalves

et al. 2023

Molecules

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With a characteristic flavour and aroma, “Maçã de Alcobaça” are apples produced in the western region of the mainland of Portugal. Given the known influence of pre-harvest cultural techniques and post-harvest conservation methods on fruit quality, this work evaluated the effect of cultural factors and conservation methods on the volatile profile of ‘Gala’ apples. Tests were carried out during four seasons (2018 to 2021) in two ‘Gala’ apple orchards (F and S) maintained with different irrigation rates and nitrogen fertilisation [normal irrigation and normal nitrogen (Control, NINN), normal irrigation and excess nitrogen (NIEN), excess irrigation and normal nitrogen (EINN), excess irrigation and excess nitrogen (EIEN)], and under three storage conditions [Controlled Atmosphere + 1-methylcyclopropene (CA+1-MCP), Dynamic Controlled Atmosphere (DCA) and DCA+1-MCP]. The intact fruit volatiles were isolated by headspace solid–phase microextraction (HS–SPME) and analysed by Gas Chromatography with Flame Ionisation Detection and Gas Chromatography-Mass Spectrometry at harvest (T0) and after 8 months of storage (T8). HS–SPME volatiles from ‘Gala’ apples, obtained at T0 in control conditions, were characterised by trans,trans-α-farnesene dominance (36–69%), followed by hexyl acetate (5–23%) and hexyl hexanoate (3–9%). The four irrigation and nitrogen treatments did not evidence main changes in the apple volatile profile. Instead, storage conditions changed the ratio between compounds; previously undetected compounds attained high percentages and decreased the intensity of the dominant compounds in the control conditions. Although all storage conditions tested changed the volatile profile and emanation intensity, the effect was more accentuated in storage for 8 months with DCA+1-MCP.

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