Dynamic controlled atmosphere and ultralow oxygen storage on ‘Gala’ mutants quality maintenance

Abstract

The aim of the present work was to compare the effect of ultralow oxygen (ULO) with dynamic controlled atmosphere (DCA) and controlled atmosphere (CA) on the post storage quality of 'Royal Gala' and 'Galaxy' apples after long-term storage. Two experiments were carried out with 'Royal Gala' and 'Galaxy' apples, in the years 2012 and 2013, respectively. A higher internal ethylene concentration was observed in fruits stored under CA; intermediate concentration in fruits under ULO; and the lowest by fruits stored under DCA-CF (DCA based on chlorophyll fluorescence). Flesh firmness was higher in fruits stored under DCA-CF and ULO differing from CA, in the year 2012, but in 2013 fruits stored under ULO showed the highest flesh firmness, differing from CA fruits. DCA-CF is efficient in quality maintenance of 'Royal Gala' and 'Galaxy' apples. Both 'Gala' mutants stored under ULO show a similar quality maintenance to those stored under DCA-CF.

Ethanol and Nitric Oxide in Quality Maintenance of ‘Galaxy’ Apples Stored Under Controlled Atmosphere

“…provided better maintenance of total soluble solids and reduced the microbial population (BENATO et al, 2015). Weber et al (2015) verified that the application of 0.3 mL of ethanol kg -1 fruit inhibited the ACC oxidase enzyme activity and consequently ethylene production, and aided in the maintenance of flesh firmness and titratable acidity of 'Royal Gala' apples.…”

“…Most of this production is concentrated in the mountainous regions of Rio Grande do Sul and Santa Catarina. More than half of the production belongs to the 'Gala' cultivar and its mutants, such as 'Galaxy', which stands out for its excellent quality, attractive taste and intense red peel coloration, thus being more accepted by the consumer market (BRACKMANN et al, 2009), in addition to high succulence and good balance between acidity and soluble solids, (THEWES et al, 2015).…”

“…The use of post-harvest ethanol may be feasible, since the treatment is simple and inexpensive, is easy to apply and has few negative effects when applied at the correct dose (ASODA et al, 2009). The application of ethanol has a suppressive effect on the transducing genes of ACC synthase enzyme BO-ACS1 and BO-ACS2, and ACC oxidase enzyme BO-ACO1 and BO-ACO2, both precursors of ethylene synthesis (PODD, VAN STADEN, 1998;ASODA et al, 2009), resulting in lower ethylene production and fruit quality conservation after storage, and according to Thewes et al (2015), endogenous ethanol production decreases the activity of the ACC oxidase enzyme and reduces physiological disturbance in fruits maintained at 0.4 kPa O 2 . The application of ethanol vapor in plum Reubennel cv.…”

Respiration rate and ethylene metabolism of ‘Jonagold’ apple and ‘Conference’ pear under regular air and controlled atmosphere

“…Low O 2 conditions reduce oxidative metabolism and enhance fermentation (Imahori et al 2013) and ripening may also be delayed by ethanol (Asoda et al 2009), especially by decreasing ACC-oxidase activity and ethylene production (Liu et al 2012). Thewes et al (2015) also observed lower ACC-oxidase activity in 'Royal Gala' apples when stored under O 2 partial pressures lower than 0.6 kPa.…”

Influence of Yellow Light-Emitting Diodes at 590 nm on Storage of Apple, Tomato and Bell Pepper Fruit

“…Solar irradiation together with climatic conditions (15), harvest date, genotype and postharvest factors, as storage temperature, O 2 and CO 2 contents, signifi cantly infl uence postharvest behaviour of fruits and vegetables (16).…”