RESUMONeste trabalho caracterizou-se a qualidade dos frutos em diferentes pontos de colheita para armazenamento das cultivares de maracujá: BRS Gigante Amarelo, BRS Ouro Vermelho e BRS Sol do Cerrado. Foram avaliados as características físicas dos frutos (aparência, perda de massa, coloração da casca) e os parâmetros químicos do suco (conteúdo de acidez, pH, ácido ascórbico, sólidos solúveis totais, açúcares solúveis totais e açúcares redutores). Utilizou-se uma Amostragem Simples ao Acaso (ASA), com 0,05 de significância e as médias foram comparadas pelo Teste "t" por Intervalo de Confiança. Os frutos colhidos nos estádios iniciais de amadurecimento apresentaram maior perda de massa e alteração da qualidade do suco. Conclui-se que os frutos das diferentes cultivares colhidos na safra de verão (novembro/dezembro) devem ter pelo menos 55% de casca com coloração amarela para proporcionar menor perda de massa, manter a qualidade do suco e aumentar a sua vida útil. Palavras-chave: Passiflora edulis, estádios de maturação, BRS Gigante Amarelo, BRS Ouro Vermelho, BRS Sol do CerradoDetermination of the harvest point of different passion fruit cultivars ABSTRACT In this study the fruit quality was characterized at different harvest points for storage of varieties of passion fruits: BRS Gigante Amarelo, BRS Ouro Vermelho and BRS Sol do Cerrado. The physical characteristics of fruits (appearance, mass loss and peel color) and chemical parameters of juice (content of acidity, pH, ascorbic acid, total soluble solids, total soluble sugars and reducing sugars) were characterized. The method of Simple Random Sampling (SRS) was applied, with 0.05 level of significance, and means were compared using the "t" Test for Confidence Intervals. Fruits harvested in the early ripening stages showed a higher mass loss as well as the worst juice quality. It was concluded that fruits of different cultivars harvested in summer seasons must present at least 55% of yellow peel color to render the lower mass loss, the best quality of juice and to extend the storage time.

This work evaluated physicochemical parameters of Golden papaya stored under refrigeration in controlled atmospheres. The fruits were kept at 13  in chambers containing either 3 or 6% O2 combined with 6%, 10% or 15% CO2. Moreover, a normal atmosphere was produced with 20.8% O2 and 0.03% CO2 with ethylene scrubbing, and a control treatment was used with ambient conditions. Evaluations were performed at the following times: before storage, after 30 days of storage in controlled atmosphere, and after removal from controlled atmosphere and storage for 7 days in the cold room. At the lower O2 levels and higher CO2 levels, the ripening rate was decreased. The drop in pulp acidity was avoided after 30 days of storage at 3% O2, but the fruits reached normal acidity after removal from controlled atmosphere and storage for 7 days in the cold room. The reducing sugars remained at a higher concentration after 30 days under 3% O2 and 15% CO2 even 7 days after removal from controlled atmosphere and storage in the cold room. This atmosphere also preserved the content of ascorbic acid at a higher level.

Knowledge of the respiration rate during the storage is important in the evaluation of the post-harvest tools that preserve fruit quality, and also for the provision of information for the development of new packages. This work aimed to evaluate the respiration rate of 'Golden' Carica papaya stored under refrigeration and controlled atmosphere conditions. The fruit was kept at 13 °C in controlled atmospheres comprising three levels of O 2 (20.8 %, 6 %, 3 %) with a minimum level of CO 2 (0.1 %); and three levels of CO 2 (0.1 %, 6 %, 12 %) with the lowest level of O 2 (3 %). Measurements were taken at intervals of 5 days during the 30 days of storage. The mass loss and the peel color of the fruits were identified at the end of the storage period. The fruit maintained under 'normal' atmosphere conditions (20.8 % O 2 and 0.1 % CO 2 ) increased its respiration rate after the 10 th day, reaching after 30 days 4.3 times the initial value. After 30 days in 3 % O 2 , the respiration rate was 2.9 times less than in the normal atmosphere. The decrease in respiration rate minimized the mass loss in fruit stored at 3 % O 2 , but it was unaffected by increasing levels of CO 2 .

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Changes in atmosphere composition make possible the increasing in postharvest life of fruits, but under extreme conditions it can alter the product quality. This research work investigates the physicochemical changes of 'Golden' papaya stored at 13 o C in different controlled atmospheres. It was evaluated peel colour, mass loss, pulp firmness, titratable acidity, pH, and soluble solids content in fruits stored under atmospheres with lower O 2 (1, 3 and 5%) and higher CO 2 concentrations (2, 6 and 10%). Fruits stored in 1% O 2 showed detrimental green colour changes, however the ones stored in O 2 levels above 3% presented small changes in colour. Furthermore, the colour changes were also delayed by increasing CO 2 levels to 10%. Pulp hardness and atypical acidity were perceived at 1% O 2 and 10% CO 2 levels. The O 2 level of at least 3% is essential to avoid physical and chemical disorders. By increasing the CO 2 levels to 10% effectively slowed down the ripening process, but sensory analysis should be conducted to ascertain the quality of the product.