title: Effect of dynamic controlled atmosphere monitored by respiratory quotient and 1-methylcyclopropene on the metabolism and quality of 'Galaxy' apple harvested at three maturity stages.
abstract: The objective of this study was to evaluate the interaction between controlled atmosphere (CA), CA+1-methylcyclopropene (1-MCP) and dynamic controlled atmosphere monitored by respiratory quotient (DCA-RQ) with three fruit maturity stages at harvest (early harvest date, optimal harvest date and late harvest date) on 'Galaxy' apple metabolism and quality after harvest and 9months storage plus 7days of shelf life at 20°C. Fruit stored under dynamic controlled atmosphere monitored by respiratory quotient 1.3 (DCA-RQ 1.3) showed lower ethylene production, respiration rate, mealiness and higher flesh firmness in comparison to CA stored fruit, but did not differ from those treated with 1-MCP. The dynamic controlled atmosphere monitored by respiratory quotient 1.5 (DCA-RQ 1.5) increased the acetaldehyde, ethanol and ethyl acetate concentration, regardless of the fruit maturity at harvest. The storage of 'Galaxy' apple under DCA-RQ 1.3 is efficient in keeping quality regardless of the maturity stage at harvest.
authors.affiliation: Department of Plant Science, Postharvest Research Center, Federal University of Santa Maria, Roraima Avenue 1000, Camobi, Santa Maria, 97105-900, RS, Brazil. Electronic address: fthewes@yahoo.com.br.
authors.forename: Fabio Rodrigo
authors.initials: FR
authors.lastname: Thewes
authors.affiliation: Department of Plant Science, Postharvest Research Center, Federal University of Santa Maria, Roraima Avenue 1000, Camobi, Santa Maria, 97105-900, RS, Brazil.
authors.forename: Auri
authors.initials: A
authors.lastname: Brackmann
authors.affiliation: Federal Institute of Santa Catarina (IFSC), Campus Urupema, Senadinho Road, Center, Urupema, Santa Catarina, 88625-000, SC, Brazil.
authors.forename: Rogerio de Oliveira
authors.initials: RO
authors.lastname: Anese
authors.affiliation: Department of Plant Science, Postharvest Research Center, Federal University of Santa Maria, Roraima Avenue 1000, Camobi, Santa Maria, 97105-900, RS, Brazil.
authors.forename: Vagner
authors.initials: V
authors.lastname: Ludwig
authors.affiliation: Department of Plant Science, Postharvest Research Center, Federal University of Santa Maria, Roraima Avenue 1000, Camobi, Santa Maria, 97105-900, RS, Brazil.
authors.forename: Erani Eliseu
authors.initials: EE
authors.lastname: Schultz
authors.affiliation: Department of Plant Science, Postharvest Research Center, Federal University of Santa Maria, Roraima Avenue 1000, Camobi, Santa Maria, 97105-900, RS, Brazil.
authors.forename: Luana Ferreira
authors.initials: LF
authors.lastname: Dos Santos
authors.affiliation: Department of Plant Science, Postharvest Research Center, Federal University of Santa Maria, Roraima Avenue 1000, Camobi, Santa Maria, 97105-900, RS, Brazil.
authors.forename: Lucas Mallmann
authors.initials: LM
authors.lastname: Wendt
mesh_terms: D000693:Anaerobiosis; D001272:Atmosphere; D003521:Cyclopropanes / Q000494:pharmacology*; D005030:Ethylenes / Q000378:metabolism; D061353:Food Storage; D005638:Fruit / Q000378:metabolism; D027845:Malus / Q000254:growth & development / Q000378:metabolism*; D010101:Oxygen Consumption; D025341:Principal Component Analysis
chemical_list: D003521:Cyclopropanes; D005030:Ethylenes; C036216:ethylene; C412563:1-methylcyclopropene
keywords: Anaerobic metabolism; Ethylene; Flesh firmness; Malus domestica; Physiological disorders