Influence Of Maturity Stage On Fruit Longevity Of Cherry Tomatoes Stored At Ambient And Controlled Temperature

Fruit maturity stage has direct influence on the post-harvest life and consumer quality. Therefore, the understanding of the maturation process and its quality characteristics for storage are key factors for commercialization. In face of the foregoing, this study aimed to determine shelf life and changes in physical and chemical indexes of cherry tomatoes (Perinha Água Branca (PAB) and Mascot), assessing fruit harvested at four maturity stages and stored at ambient and controlled temperatures. For this, it was used fruit at turning, pink, red and ripe maturity stages, submitted to ambient (25 ± 2 °C) and controlled (12 °C and 90% RH) temperature, and assessed over time the indexes of fresh mass loss, titratable acidity, pH, soluble solids and ascorbic acid. The experimental design was completely randomized design in a factorial scheme of 2×4×7 for ambient temperature and 2×4×8 for controlled temperature. At ambient temperature, a longevity of up to 20 days was observed for PAB and Mascot fruit harvested at turning and pink maturity stages. When harvested at red and ripe stages, the longevity was of 15 days for PAB fruit and of 15 and 11 days, respectively, for Mascot fruit. At controlled temperature, PAB fruit showed longevity of 24 days when harvested at turning and pink stages and of 20 and 7 days, respectively, when harvested at red and ripe stages. A longevity of up to 27 days was observed for Mascot fruit harvested at turning stage and of 24 days for the other stages. The fruit harvested at turning and pink maturity stages, associated with storage under controlled conditions, presented higher longevity and maintenance of physical and chemical indexes of quality.3764027403

Anticipation of 'ubá' mango ripening with preharvest ethephon application

Preharvest application of ethephon, a compound that releases ethylene when hydrolyzed, can anticipate and standardize mango harvesting. In this study, the effects of different doses of ethephon, applied at preharvest, on harvest anticipation of 'Ubá' mango were evaluated. On the 17th week after anthesis, 25 mango trees, five per treatment, were sprayed with ethephon at 0, 250, 500, 750 and 1000mg L-1, plus 0.5% of mineral oil. Five fruits from each plant were harvested daily until full ripening, and evaluated. Except, for dose 0mg L-1, in which six days after ethephon application (DAAE), harvest was carried out weekly up to 41DAAE The treated fruit presented a more intense flesh color than the non-treated, particularly at the doses of 500 and 750mg L-1. Fruit treated with 500, 750 and 1000mg L-1showed abrupt firmness reduction from the 1st DAAE and TSS higher than 18°Brix on the 6th DAAE. Non-treated fruit presented slower firmness reduction and reached 18°Brix on the 35th DAAE. The dose of 1000mg L-1 of ethephon resulted in premature fall and low fruit quality. Application of 500 or 750mg L-1 of ethephon allowed to anticipate and to standardize mango harvesting. These doses also allowed harvesting fruit with the best commercial quality and without the need of climatization after harvest.A aplicação pré-colheita de ethephon, composto que libera etileno quando hidrolisado, pode antecipar e uniformizar a colheita de manga. Neste trabalho foram avaliados os efeitos de diferentes doses de ethephon, aplicadas na pré-colheita, sobre a antecipação da colheita de manga 'Ubá'. Na 17ª semana após a antese, 25 mangueiras, sendo cinco por tratamento, foram pulverizadas com ethephon nas doses 0, 250, 500, 750 e 1000L-1, acrescido de 0,5% de óleo mineral. Foram colhidos 10 frutos de cada planta, diariamente, até o completo amadurecimento, com exceção da dose 0L-1, em que, a partir de 6 dias após aplicação do ethephon (DAAE), a colheita foi semanal até 42DAAE. Dos 10 frutos colhidos, cinco foram analisados no dia da colheita e cinco armazenados a 20±080°C e 90±5% UR e avaliados após o completo amadurecimento. Frutos tratados apresentaram coloração de polpa mais intensa que os não tratados, especialmente na dose 500L-1. Frutos tratados com 500, 750 e 1000L-1 apresentaram brusca queda da firmeza a partir do 1ºDAAE, e SST superiores a 18°brix no 6ºDAAE, enquanto nos não tratados, a queda da firmeza foi mais lenta e atingiram 18°brix aos 35ºDAAE. A dose de 1000L-1 de ethephon resultou em queda prematura e má qualidade final dos frutos. Frutos colhidos no 3oDAAE e armazenados atingiram o completo amadurecimento com 12, 7, 6, 4 e 6 dias para as doses 0, 250, 500, 750 e 1000L-1, respectivamente. A aplicação de 500 ou 750L-1 de ethephon, seguida da colheita no 3oDAAE, permitiu a obtenção de frutos com qualidade comercial, além de dispensar a climatização após a colheita

Influência do etileno sobre características químicas de frutos de manga var. Keitt, colhidos em estádio pré-climatérico

Frutos de manga (Mangifera indica L.) variedade Keitt, colhidos em estádio pré-climatérico, receberam tratamento com 500 e 1.000 ppm de Ethrel (com exceção da testemunha), sendo submetidos a determinações de carboidratos solúveis, vitamina C, proteínas e umidade, de acordo com amostragens realizadas 3, 6, 9 e 16 dias pós-colheita. Os resultados obtidos, revelaram que o Ethrel não excerceu nenhuma influência nas características químicas dos frutos e que, somente em termos de carboidratos solúveis e vitamina C, os frutos mostraram alterações durante a maturação.Mango fruits (Mangtfera indica L.) Keitt variety, harvested in the pre-climateric stage were treated with 500 and 1,000 ppm of Ethrel (except the control). Soluble carbohydrates, vitamin C, proteins and humidity were evaluated on the samples at 3, 6, 9 and 16 days post-harvest. The results obtained, showed that Ethrel did not have influence on the chemical characteristics of the fruits. Fruits showed modificátions during the maturation only for the parameters of soluble carbohydrate and vitamin C

Descriptions of two extinct mammals of the order Xenarthra from the Pleistocene of Texas

Volume: 51Start Page: 107End Page: 12