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Juazeiro do Norte, Brazil

The present study evaluated the effects of modified atmosphere packaging on inhibition of the development of chilling injury symptoms in 'Douradão' peach after cold storage and the possible involvement of cell wall enzymes. Fruits were harvested at the middle stadium of ripening, packed in polypropylene trays and placed inside low density polyethylene (LDPE) bags (30, 50, 60 and 75 μm of thickness) with active modified atmosphere (10 kPa CO 2 + 1.5 kPa O 2, balance N 2). The following treatments were tested: Control: peaches held in nonwrapped trays; MA30: LDPE film - 30 μm; MA50: LDPE film - 50 μm; MA60: LDPE film - 60 μm and MA75: LDPE film - 75 μm. Fruits were kept at 1±1°C and 90±5% relative humidity (RH) for 28 days. After 14, 21 and 28 days, samples were withdrawn from MAP and kept in air at 25±1°C and 90±5% RH for ripening. On the day of removal and after 4 days, peaches were evaluated for woolliness incidence, pectolytic enzymes activities. The respiratory rate and ethylene synthesis were monitored during 6 days of ripening. The results showed that MA50 and MA60 treatments had positive effect on the inhibition of the development of woolly texture and reduced pectin methylesterase activity on the ripe fruits, keeping good quality of 'Douradão' peach during 28 days of cold storage. The treatments Control, MA30 and MA75 showed higher woolliness incidence and did not present marketable conditions after 14 days of cold storage. Source

de Aragao F.A.S.,Laboratorio Of Melhoramento E Recursos Geneticos Vegetais | de Sousa Nunes G.H.,UFERSA | de Queiroz M.A.,UNEB
Crop Breeding and Applied Biotechnology | Year: 2015

Significant genotype vs. environment interaction (G x E) is expected as a result of geographical diversity and differences in management techniques in melon growing. Ninety-six F3 families from the cross between inodorus and conomon melons were evaluated in three environments for studying interaction. The G x E interaction, genetic parameters, and direct and indirect gains were estimated. Average weight of the fruit, pulp thickness, cavity thickness, pulp firmness, and soluble solids were evaluated. The simple part of the G x E interaction was always greater than 99%, except for pulp firmness, where there was predominance of the complex part. The coefficient of genetic variation and genetic variance were overestimated by the G x E interaction. The direct gains from selection were higher than the indirect, except when selection was made by the mean of the three environments. Genotype assessments in more than one location are necessary, but selection should be made by the mean values of families in the environments. © 2015, Brazilian Society of Plant Breeding. All rights reserved. Source

Nascimento R.S.M.,Federal University of Vicosa | Cardoso J.A.,IFTO | Cocozza F.D.M.,UNEB
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2014

The 'mangaba' is widely used by agribusiness, as compared to other native fruits of Northeast, especially in the Cerrado biome for food utilization. This study aimed to evaluate the physical and physicochemical characterization of 'mangabeira' fruits in the western region of Bahia. Tree hundred fruits were sampled from ten matrices, which were collected in an area of the municipalities of Angical, Barreiras and St Desiderio and conducted to the Seed Laboratory of UNEB. For the physical assessments, longitudinal and transversal diameters of the fruit, fruit weight, total seed weight per fruit, weight of the pulp and peel, and yield of pulp and peel were considered. As for the physicochemical evaluations, the fruit pulp was subjected to the determinations of pH, soluble solids content, titratable acidity and ratio. For the variables, longitudinal and transversal diameters, the weight of pulp and peel, seed weight, fruit weight and yield of pulp and peel, the means were, respectively, 32.34 and 31.87 mm, 14.77, 2.40 and 17.17 g and 85.93%. With regard to pH, SS, AT and ratio (SS/AT), the means were 3.93, 17.04° Brix, 0.98 and 18.62. The results indicated that there are statistically significant differences between all variables evaluated. Source

de Santana L.R.R.,UNEB | Benedetti B.C.,University of Campinas | Sigrist J.M.M.,Grupo de Engineering e Pos colheita ITAL
Revista Brasileira de Fruticultura | Year: 2010

The sensory, physical and chemical characteristics of 'Douradão' peaches cold stored in different modified atmosphere packaging (LDPE bags of 30, 50, 60, 75μm thickness) were studied. After 14, 21 and 28 days of cold storage (1 ± 1 °C and 90 ± 5% RH), samples were withdrawn from MAP and kept during 4 days in ambient air for ripening. Descriptive terminology and sensory profile of the peaches were developed by methodology based on the Quantitative Descriptive Analysis (QDA). The assessors consensually defined the sensory descriptors, their respective reference materials and the descriptive evaluation ballot. Fourteen individuals were selected as judges based on their discrimination capacity and reproducibility. Seven descriptors were generated showing similarities and differences among the samples. The data were analysed by ANOVA, Tukey test and Principal Component Analysis (PCA). The atmospheres that developed inside the different packaging materials during cold storage differed significantly. The PCA showed that MA50 and MA60 treatments were more characterized by the fresh peach flavour, fresh appearance, juiciness and flesh firmness, and were effective for keeping good quality of 'Douradão' peaches during 28 d of cold storage. The Control and MA30 treatments were characterized by the mealiness, the MA75 treatment showed lower intensity for all attributes evaluated and they were ineffective to maintain good quality of the fruits during cold storage. Higher correlation coefficients (positive) were found between fresh appearance and flesh firmness (0.95), fresh appearance and juiciness (0.97), ratio and intensity of fresh peach smell (0.81), as well as higher correlation coefficients (negative) between Hue angle and intensity of yellow colour (-0.91), fresh appearance and mealiness (-0.92), juiciness and mealiness (-0.95), firmness and mealiness (-0.94). Source

Bandeira G.R.L.,Empresa Baiana de Desenvolvimento Agricola | de Queiroz S.O.P.,UNEB | Aragao C.A.,UNEB | Costa N.D.,Embrapa Semiarido | Santos C.A.F.,Embrapa Semiarido
IRRIGA | Year: 2013

This work aimed to study the development of five onion cultivars (IPA 10, IPA 11, Alfa São Francisco, Serena and Antares), in Juazeiro, State of Bahia, Brazil, drip irrigated, under four methods of irrigation management: Penman - Monteith FAO, tensiometry, 100% and 70% of class A pan evaporation. The experimental design was completely randomized, in a split-plot design, consisting of four irrigation management methods in the plots and five onion cultivars in the subplots. The variables evaluated were: total yield, marketable yield, yield of type 1, 2, 3 and 4 bulbs, pyruvic acid content and soluble solids content. There was no interaction effect between irrigation management methods and the onion cultivars. The yield and quality of Serena and Antares cultivars were significantly higher than the ones of the other cultivars. The irrigation management based on class A pan at 70% resulted in a lower performance for the variable marketable yield. Source

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