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Características físicas de frutos e amêndoas e características químico-nutricionais de amêndoas de acessos de sapucaia; Fruit and almond physical characteristics and almond chemical-nutritional characteristics of sapucaia accesses

SOUZA, Valdomiro Aurélio Barbosa de; CARVALHO, Michelle Garcêz de; SANTOS, Kleber Silva; FERREIRA, Clemilton da Silva
Fonte: Sociedade Brasileira de Fruticultura Publicador: Sociedade Brasileira de Fruticultura
Tipo: Artigo de Revista Científica
Português
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O objetivo deste trabalho foi avaliar a variabilidade fenotípica entre acessos de sapucaia para características físicas de frutos e amêndoas e características químico-nutricionais de amêndoas, para fins de uso em futuros trabalhos de melhoramento genético. Os frutos foram colhidos no estádio de pré-maturação e mantidos em temperatura ambiente por cerca de uma semana para completar a maturação. As seguintes características físicas e químico-nutricionais foram analisadas: peso médio de fruto, diâmetro longitudinal, diâmetro equatorial, relação diâmetro longitudinal/diâmetro equatorial do fruto, diâmetro da tampa, peso médio de amêndoa, comprimento da amêndoa, diâmetro da amêndoa, relação comprimento/diâmetro da amêndoa, número de amêndoas/fruto, energia, gordura, proteína bruta, cinzas e minerais. Os dados foram submetidos à análise de variância, e as médias dos acessos, comparadas pelo teste de Scott-Knott a 5%. Houve diferenças estatísticas entre os acessos para as características avaliadas, exceto gordura e proteína bruta. Observou-se grande variabilidade fenotípica no germoplasma analisado, indicando que essa variabilidade pode servir de base inicial para futuros trabalhos de melhoramento genético.; The objective of this work was to evaluate fruit and almond physical characteristics and almond chemical-nutritional characteristics of sapucaia accesses. Fruits were harvested at the stage of pre-ripening and kept at environment temperature for about a week to complete the ripening. The following physical and chemical-nutritional characteristics were analyzed: fruit mean weight...

Vegetative and fruit characteristics of papaya trees obtained by mass selection

SILVA, Mariela Mattos da; BROETTO, Sabrina Garcia; VALBAO, Sigrid Costa; COSTA, Adelaide de Fatima Santana da; SILVA, Diolina Moura
Fonte: UNIV ESTADUAL LONDRINA Publicador: UNIV ESTADUAL LONDRINA
Tipo: Artigo de Revista Científica
Português
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The present work had as purpose to evaluate some characteristics of papaya trees (Carica papaya L.), Golden cultivar, obtained trough plant mass selection, regarding plant and fruit quality in the first months of production. The samples were evaluated in a commercial crop at: 0, 20, 40, 70, 130, 180, 230, 260, 280, 310 and 340 days after the planting (DAP) and the first fruits were harvested at 230 DAP. The results showed the low height (199cm in 340 DAP) and low first flowering`s heigth (71cm), which is important to facilitate the harvest process. The plants presented good yield with high number of leafs (allowing a great area of fruit cover) and about 60 fruits per plant. The fruits kept similar features to cv. Golden. The fruit`s fresh weight ranged from 302.4 to 467.5g, which is in the range of the Brazilian market. The pulp thickness was 2.35cm, which is a feature of great economic interest. The pulp thickness showed close relation with climatic factors, and great variations of temperature and precipitation accelerated the pulp loss of thickness.

Hand position on the bunch and source-sink ratio influence the banana fruit susceptibility to crown rot disease

LASSOIS, L.; BASTIAANSE, H.; CHILLET, M.; JULLIEN, A.; JIJAKLI, M. H.; BELLAIRE, L. de lapeyre de
Fonte: WILEY-BLACKWELL PUBLISHING, INC Publicador: WILEY-BLACKWELL PUBLISHING, INC
Tipo: Artigo de Revista Científica
Português
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The postharvest development of crown rot of bananas depends notably on the fruit susceptibility to this disease at harvest. It has been shown that fruit susceptibility to crown rot is variable and it was suggested that this depends on environmental preharvest factors. However, little is known about the preharvest factors influencing this susceptibility. The aim of this work was to evaluate the extent to which fruit filling characteristics during growth and the fruit development stage influence the banana susceptibility to crown rot. This involved evaluating the influence of (a) the fruit position at different levels of the banana bunch (hands) and (b) changing the source-sink ratio (So-Si ratio), on the fruit susceptibility to crown rot. The fruit susceptibility was determined by measuring the internal necrotic surface (INS) after artificial inoculation of Colletotrichum musae. A linear correlation (r = -0.95) was found between the hand position on the bunch and the INS. The So-Si ratio was found to influence the pomological characteristics of the fruits and their susceptibility to crown rot. Fruits of bunches from which six hands were removed (two hands remaining on the bunch) proved to be significantly less susceptible to crown rot (INS = 138.3 mm 2) than those from bunches with eight hands (INS = 237.9 mm 2). The banana susceptibility to crown rot is thus likely to be influenced by the fruit development stage and filling characteristics. The present results highlight the importance of standardising hand sampling on a bunch when testing fruit susceptibility to crown rot. They also show that hand removal in the field has advantages in the context of integrated pest management...

Variação morfológica e química dos frutos na escolha dos animais frugívoros da Mata Atlântica

Cazetta, Eliana
Fonte: Universidade Estadual Paulista (UNESP) Publicador: Universidade Estadual Paulista (UNESP)
Tipo: Tese de Doutorado Formato: 107 f. : il.
Português
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Pós-graduação em Ciências Biológicas (Biologia Vegetal) - IBRC; As características dos frutos como morfologia e química têm sido tradicionalmente explicadas como resultado da seleção dos dispersores de sementes. Mas a importância dos frugívoros em moldar as características dos frutos tem sido recentemente questionada sob diferentes perspectivas. Alguns estudos sugerem que outras interações podem simultaneamente atuar sobre a evolução das características dos frutos. Muitos organismos atuam como predadores de sementes e seus efeitos precisam ser considerados. Desta maneira, as plantas enfrentam um dilema evolutivo entre atração aos legítimos dispersores de sementes e defesa contra predadores e patógenos. Neste estudo, primeiramente nós avaliamos as características dos frutos relacionadas com atração e defesa em uma ampla amostra de frutos da Mata Atlântica, da Ilha do Cardoso, São Paulo, Brasil. Posteriormente, nós testamos como algumas características específicas influenciam o consumo pelas aves frugívoras. Nós observamos que as características morfológicas e químicas dos frutos apresentam sinal filogenético e em geral padrões independentes de co-variação. Ao contrário, as cores e os contrates dos frutos não apresentam sinal filogenético e frutos mais saturados são ricos em lipídeos e energia mas pobres em carboidratos. Portanto...

Bebida de maracuja natural "light" pronta para beber : formulação, produção e estudo de vida-de-prateleira.; Passion fruit juice beverage with different sweetener systems : formaulation, production and shelf life study.

Renata De Marchi
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 12/12/2006 Português
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O mercado de bebidas à base de frutas está em constante expansão. Os consumidores querem desfrutar de bebidas que vão além de apenas saciar a sede, e que ofereçam vantagens nutricionais e conveniência. Paralelamente à preferência dos consumidores por bebidas saudáveis, há uma crescente tendência ao consumo de bebidas de baixa caloria. Os consumidores estão cada vez melhor informados sobre a importância de uma dieta saudável, com menor ingestão de açúcar e gordura. Assim, o presente trabalho teve como objetivo formular, produzir, avaliar a aceitação em dois diferentes mercados consumidores ? Brasil e Estados Unidos, determinar o perfil sensorial e estudar a vida-de-prateleira de bebidas de maracujá naturais, prontas para beber, adoçadas com sacarose (referência), aspartame, sucralose, e mistura aspartame/acesulfame-K (4:1) (light), respectivamente, durante 180 dias de estocagem. A bebida de maracujá referência foi formulada utilizando-se metodologia de superfície de resposta e testes de aceitação. O conteúdo de polpa de maracujá e a concentração de sacarose, selecionados para serem usados em tal bebida foram, respectivamente, 2,5°Brix (resultantes da mistura: polpa de maracujá e água) e 10%. Para a formulação das bebidas light...

Desempenho agronômico de maracujazeiros tratados com produtos alternativos e fertilizantes foliares; Agronomic performance of passion fruit plants treated with alternative products and foliar fertilizers

Junqueira, Keize Pereira; Faleiro, Fábio Gelape; Uesugi, Carlos Hidemi; Junqueira, Nilton Tadeu Vilela; Bellon, Graciele; Santos, Erivanda Carvalho dos; Ramos, Leandro Nogueira
Fonte: Sociedade Brasileira de Fruticultura Publicador: Sociedade Brasileira de Fruticultura
Tipo: Artigo de Revista Científica
Português
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A resistência induzida é um método alternativo de controle de doenças. Entretanto, há poucos estudos relacionando o uso destes produtos e outros métodos alternativos à produtividade das plantas e às características físicas e químicas dos frutos. Objetivou-se avaliar a severidade de doenças, as características físicas e químicas de frutos e a produtividade de plantas tratadas com produtos alternativos e fertilizantes foliares. Plantas de maracujazeiro BRS Gigante Amarelo clonadas, em campo, foram submetidas, por um ano, a pulverizações quinzenais com: água (testemunha), Cuprozeb® (fungicida-padrão), acibenzolar-S- metil - ASM, Agro-mos®, fosfito de potássio, fosetyl-Al, gesso agrícola e CPAC-GE (produto em teste). O delineamento foi o em blocos casualizados, com quatro repetições e 20 frutos por repetição. Para o estudo da produtividade, utilizaram-se quatro repetições e seis plantas úteis por parcela. As colheitas ocorreram de novembro/2008 a abril/2009. As severidades foram avaliadas com escala de notas. Houve redução da severidade da virose, verrugose e bacteriose em todos os tratamentos, com exceção do Cuprozeb® para virose. Não foi observada redução da antracnose. Frutos com maior massa fresca foram obtidos com aplicações de gesso agrícola (236...

Produtividade e características de fruto de pomares de maracujá implantados com sementes originais e reaproveitadas do híbrido BRS Gigante Amarelo; Productivity and characteristics of passion fruit of commercial orchard implanted with original and reused seeds from BRS Gigante Amarelo hybrid

Cunha, Marlon
Fonte: Universidade de Brasília Publicador: Universidade de Brasília
Tipo: Dissertação
Português
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Dissertação (mestrado)—Universidade de Brasília, Programa de Pós-Graduação em Agronomia, 2013.; A produção de maracujá apresenta importância econômica no Brasil, devido ao uso intensivo de mão de obra, importância comercial e nutricional de seus frutos e geração de emprego e -1renda em toda cadeia produtiva. A produtividade média nacional, em torno de 14,8 t.ha , está abaixo daquelas obtidas por cultivares geneticamente melhoradas. Uma das causas da baixa produtividade é a prática comum dos produtores de maracujá de utilizar sementes aproveitadas de plantios anteriores para produção das mudas. Entre as cultivares registradas no RNC-MAPA, o BRS Gigante Amarelo lançado pela Embrapa Cerrados e parceiros em 2008 tem apresentado altas produtividades, boa adaptação edafoclimática, alta qualidade de frutos e elevado rendimento de polpa. Esta cultivar é um híbrido simples intravarietal, e o reaproveitamento de sementes a partir de plantios desta cultivar pode diminuir o seu vigor híbrido, seu potencial produtivo, o tamanho dos frutos e uniformidade do pomar. Neste trabalho, objetivou-se analisar a produtividade e as características físicas e químicas de frutos obtidas em pomares de maracujá implantados com sementes originais e reaproveitadas do híbrido BRS Gigante Amarelo. O experimento foi conduzido em um pomar comercial no município de Planaltina...

Comparative study of the mandarin hybrid fruit characteristics: Nova, Murcott and Ortanique in Capão Bonito SP, Brazil

Borges,Rogério de Sá; Pio,Rose Mary
Fonte: Sociedade Brasileira de Fruticultura Publicador: Sociedade Brasileira de Fruticultura
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2003 Português
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The Murcott tangor represent 20% of the tangerines trees in São Paulo State being the second more grown. Their fruits have good acceptance in the market cause of the good characteristics presented as: size, attractive internal and external color, transport resistance, high juice rate and industry potential. It is necessary to study the behavior of others varieties, in order to amplify the diversity of tangerine industry, which show suitable characteristics to the fresh fruit market and that make possible different harvest season. Many tangerine varieties, selected from the Citrus Germplasm Bank of the do Centro Avançado de Pesquisa Tecnológica do Agronegócio de Citros "Sylvio Moreira"/IAC, belong to trials carried out in 15 places in São Paulo State. The Capão Bonito area, south-west of the state, is one of this places where the Nova tangelo, the Ortanique and the Murcott tangors are showing quite good results about their fruit qualities. This paper had as an objective to compare the fruit characteristics of the Nova tangelo, the Murcott and the Ortanique tangors grafted on two rootstocks: Rangpur lime and Cleopatra mandarin. Accordingly to the gotten results, is possible to conclude that Nova and Ortanique had shown weight, width...

Soil nutrient availability and its impact on fruit quality of Tahiti acid lime

Mattos Junior,Dirceu; Milaneze,Thiago Fernando; Azevedo,Fernando Alves; Quaggio,José Antônio
Fonte: Sociedade Brasileira de Fruticultura Publicador: Sociedade Brasileira de Fruticultura
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2010 Português
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The Tahiti acid lime in Brazil is mostly grown in the São Paulo State. The value of this crop production ranks among the ten most important fruits in the country. The Brazilian exports of Tahiti limes have increased in the last years with a corresponding increased demand for superior quality of fresh fruits, which is affected by mineral nutrients. Therefore, this study evaluated nutrient soil availability and its influence on nutritional status of trees based on the determination of leaf and fruit nutrient concentrations, fruit characteristics, and post harvest quality. Eleven commercial groves with trees older than 4-yr and differently managed were studied. Plots with six trees in each grove were sampled for soil (0-20 cm depth layer), leaf and fruit analyses with three replicates. Correlation coefficients were pair wised established for all variables. The results showed that N leaf concentration was well correlated with green color of fruit peel as measured by a color index (r = -0.71**), and which was optimum with Leaf-N around 22 g kg-1. Leaf-Ca was inversely correlated with fruit water loss after 14-day interval from harvest (r = -0.54*) demonstrating that Ca plays an important role in Tahiti fruit shelf-life. Data also suggested that increased fruit K concentration correlated with increased fruit water losses during storage (r >0.58*).

Hunter color dimensions, sugar content and volatile compounds in pasteurized yellow passion fruit juice (Passiflora edulis var. flavicarpa) during storage

Sandi,Delcio; Chaves,José Benício Paes; Sousa,Antônio Carlos Gomes de; Parreiras,June Ferreira Maia; Silva,Marco Túlio Coelho da; Constant,Patrícia Beltrão Lessa
Fonte: Instituto de Tecnologia do Paraná - Tecpar Publicador: Instituto de Tecnologia do Paraná - Tecpar
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2004 Português
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Changes in Hunter L, a and b values, glucose, fructose and sucrose contents, concentration of four volatile compounds (ethyl butirate, ethyl caproate, hexyl butirate and hexyl caproate) and furfural, were studied in yellow passion fruit juice (Passiflora edulis var. flavicarpa) pasteurized at 75ºC/60s, 80ºC/41s or 85ºC/27s, during storage at room temperature (25±5ºC) and refrigeration (5±1ºC) for 120 days. While the sucrose content decreased, the glucose and fructose contents increased significantly over storage time. The Hunter L and b values behaved similarly, with a tendency to decrease over time, inversely to Hunter a value. Volatile compound concentrations also decreased over time, inversely to the furfural content. Pasteurization at 85ºC/27s resulted minimum changes in the studied passion fruit characteristics, while that at 75ºC/60s was the most harmful. Storage under refrigeration tended to keep the best quality characteristics of the juice.

Impact of humic substances and nitrogen fertilising on the fruit quality and yield of custard apple

Cunha,Marcelo dos Santos; Cavalcante,Ítalo Herbert Lucena; Mancin,Adriana Cristina; Albano,Francisca Gislene; Marques,Adenaelson Souza
Fonte: Editora da Universidade Estadual de Maringá - EDUEM Publicador: Editora da Universidade Estadual de Maringá - EDUEM
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2015 Português
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The custard apple (Annona squamosa L.), also known as the sugar apple, is a fruit species native to Brazil that has been poorly studied, especially in relation to the effect of humic substances on its fruit quality and yield. An experiment was conducted from December 2010 to November 2011 to evaluate the fruit quality and yield of the custard apple as a function of nitrogen fertilising and the use of humic substances. The experimental design consisted of randomised blocks, with treatments distributed in a factorial arrangement (4 x 2), using four nitrogen doses (0, 100, 175 and 250 g of N plant-1) and two humic substance applications (with and without humic substances), with four replications. The fruit yield and fruit characteristics, such as fruit mass, titratable acidity (TA), soluble solids (SS), pulp pH and SS/TA ratio, were recorded. The humic substances and the nitrogen levels significantly affected the soluble solids, titratable acidity and SS/TA ratio, while the pH pulp was only influenced by the humic substances. The humic substances promoted a quantitative increase in the fruit yield of 0.63 ton ha-1. The fruit quality and yield of the custard apple depend on the nitrogen fertiliser and the interaction of the humic substances. Nitrogen fertilising of 100 g per plant...

Model-Assisted Analysis of Spatial and Temporal Variations in Fruit Temperature and Transpiration Highlighting the Role of Fruit Development

Nordey, Thibault; Léchaudel, Mathieu; Saudreau, Marc; Joas, Jacques; Génard, Michel
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 24/03/2014 Português
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Fruit physiology is strongly affected by both fruit temperature and water losses through transpiration. Fruit temperature and its transpiration vary with environmental factors and fruit characteristics. In line with previous studies, measurements of physical and thermal fruit properties were found to significantly vary between fruit tissues and maturity stages. To study the impact of these variations on fruit temperature and transpiration, a modelling approach was used. A physical model was developed to predict the spatial and temporal variations of fruit temperature and transpiration according to the spatial and temporal variations of environmental factors and thermal and physical fruit properties. Model predictions compared well to temperature measurements on mango fruits, making it possible to accurately simulate the daily temperature variations of the sunny and shaded sides of fruits. Model simulations indicated that fruit development induced an increase in both the temperature gradient within the fruit and fruit water losses, mainly due to fruit expansion. However, the evolution of fruit characteristics has only a very slight impact on the average temperature and the transpiration per surface unit. The importance of temperature and transpiration gradients highlighted in this study made it necessary to take spatial and temporal variations of environmental factors and fruit characteristics into account to model fruit physiology.

Fenologia, Produção e Pós-colheita de frutos de buriti (Mauritia flexuosa L.f) em três veredas do cerrado no estado de Goiás.; Phenologu, Production and post-harvest e fruit buriti (Mauritia flexuosa L.f) into three palm swamp of the savanna in Goias state.

MARTINS, Maria Lúcia
Fonte: Universidade Federal de Goiás; BR; UFG; Doutorado em Agronomia; Ciências Agrárias Publicador: Universidade Federal de Goiás; BR; UFG; Doutorado em Agronomia; Ciências Agrárias
Tipo: Dissertação Formato: application/pdf
Português
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This study aimed to characterize the phenology, production and post-harvest fruit of the buriti palm tree in the Savannah as well as factors impacting on production. The study was conducted in three palm swamp with three distinct forms of occupation of the borders. The buriti palm tree were characterized as height, diameter at breast height, number of inflorescences and leaves. The number of leaves was correlated with climatic data from July 2006 to September 2009. To characterize the production were collected from three clusters per area, and determined the average weight of fruit bunches and these extrapolated data for each area. In three clusters of each palm swamp included: length of the bunch, bunch weight, fruit weight, number of rachilles, and fruit number, length rachilles, total number of loci, number of loci with fruit, no fruit locule number , and the reason the number of loci with fruits / total number of loci. Characterization were carried out fifty fruits of each of the three clusters collected in each area. The characterization of fruits were evaluated: fruit weight, diameter longitudinal, transverse diameter, transverse diameter ratio / longitudinal diameter, the pulp mass, mass of bark, seed mass, and mass of endocarp. The pulp included: pH...

A survey of selected oil composition and fruit characteristics in different olive varieties across Australia

Sweeney, S.; Butler, K.; Conlan, D.; Correll, R.; Jones, G.; McClure, P.; Taylor, R.
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Artigo de Revista Científica
Publicado em //2002 Português
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A survey was conducted to determine whether variety and location influence the oil quality and content of olives. Samples of olive fruit from different varieties were taken from various locations around Australia and determinations made for fatty acid profiles, Maturity Index, whole fruit weight, percentage oil in dried flesh, percentage moisture in whole fruit and flesh to pit ratios. Differences in oil composition and fruit characteristics were found in different olive varieties from different areas of Australia. The survey indicated that the oil percentage in dry flesh was not significantly affected by the level of ripeness, even though the Maturity Index ranged from 1 to 7. However, water content in the whole fruit decreased by 1.9% for each increase in maturity unit. Stearic acid, a saturated and therefore less desirable fatty acid, was the only fatty acid to significantly increase with increasing Maturity Index. Oleic acid is a favourable fatty acid for olive oil quality. In the varieties Manzanilla de Sevilla and Frantoio, higher levels of oleic acid were found in fruit samples from southern latitudes of Australia than from more northerly latitudes.; http://cat.inist.fr/?aModele=afficheN&cpsidt=14609028

Produtividade e qualidade de tomates Santa Cruz e Italiano em função do raleio de frutos; Yield and fruit quality of Santa Cruz and Italian tomatoes depending on fruit thinning

SHIRAHIGE, Fernando H; MELO, Arlete MT de; PURQUERIO, Luis Felipe V; CARVALHO, Cássia Regina L; MELO, Paulo César T de
Fonte: Associação Brasileira de Horticultura Publicador: Associação Brasileira de Horticultura
Tipo: Artigo de Revista Científica
Português
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O manejo do tomateiro cultivado em ambiente protegido, com ênfase no raleio de frutos, pode contribuir de forma significativa para a produção de frutos de qualidade superior, expressando assim o potencial de cada cultivar. Foi avaliado o efeito do raleio de frutos na produtividade e seus componentes e em alguns atributos de qualidade de frutos de genótipos de tomateiro dos segmentos Santa Cruz e Italiano de crescimento indeterminado, visando ao consumo in natura. Avaliaram-se 12 genótipos de tomate de mesa (seis híbridos experimentais e seis cultivares) e dois modos de condução (plantas conduzidas com e sem raleio de frutos). O experimento foi com parcelas subdivididas, distribuídas em blocos completos ao acaso com três repetições. As parcelas foram representadas pelos genótipos e as subparcelas pelos modos de condução. Avaliaram-se o número de frutos por planta, produtividade comercial de frutos, produtividade de frutos não-comercializáveis, massa média do fruto, comprimento e largura do fruto, pH, teor de sólidos solúveis totais (SS), acidez titulável (AT), relação entre SS e AT, teor de ácido ascórbico e teor de licopeno. O raleio dos frutos proporcionou incremento da produtividade comercial, massa média...

Simultaneous selection in progenies of yellow passion fruit using selection indices

Rosado,Luciana Domiciano Silva; Santos,Carlos Eduardo Magalhães dos; Bruckner,Claudio Horst; Nunes,Endson Santana; Cruz,Cosme Damião
Fonte: Universidade Federal de Viçosa Publicador: Universidade Federal de Viçosa
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/02/2012 Português
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This study aimed to evaluate the efficiency of simultaneous selection (selection indices) using estimated genetic gains in yellow passion fruit and to make a comparison between the methodologies of Mulamba & Mock and Elston. The study was conducted with 26 sib progenies of yellow passion fruit for intrinsic production characteristics including fruit number, fruit mass, fruit length and diameter, and for the fruit characteristics skin thickness, soluble solids and acidity. Two methodologies were applied: first, in the joint analysis of fruit characteristics and of intrinsic production characteristics in a single phase of selection; and second, in the analysis in two phases, in which priority was given to the intrinsic production characteristics in the first phase, and later, in the second phase, the best fruit characteristics were chosen among the progenies of the first phase. The analysis of variance was applied to the data to detect genetic variability among progenies. The Elston's selection indice was unable to provide distribution of genetic gains consistent with the purposes of the study, as it selected a single progeny of passion fruit. However, the index based on the sum of ranks of Mulamba & Mock was more suitable, as it provided a balanced distribution of gains...

Thinning with NAA, NAD, ethephon, urea and by hand to improve fruit quality of 'Gerdi' apricot

Taghipour,Leila; Rahemi,Majid; Assar,Pedram
Fonte: Brazilian Journal of Plant Physiology Publicador: Brazilian Journal of Plant Physiology
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2011 Português
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This research was conducted to study the effects of chemical and hand thinning on fruit quality of 'Gerdi' apricot. In the first year, three weeks after full bloom (AFB) branches of mature trees were sprayed with naphthalene acetic acid (NAA) at 10, 20, and 40 mg L-1, naphthalene acetamide (NAD) at 20, 40, and 80 mg L-1, ethephon at 50, 100 and 200 mg L-1, or urea at 0.2, 0.4, and 0.6%. In next year, hand thinning was performed as a separate experiment and leaf to fruit ratio (LFR) was adjusted to 10:1, 20:1 or 30:1 at pit-hardening stage of fruit development. In both years, NAA at 40 mg L-1, NAD at 80 mg L-1 and all concentrations of ethephon significantly increased fruit drop. All concentrations of urea significantly increased fruit drop in 2006, but only the two lower concentrations were effective in 2007. NAA at 20 and 40 mg L-1, and NAD at 40 and 80 mg L-1 increased fruit weight in 2006, but only the highest concentration of NAD was effective in 2007, while urea was effective at all concentrations in both years. Ethephon effect on fruit weight was not significant at all. Hand thinning consistently increased fruit weight, but length and diameter were increased only at a leaf to fruit ratio of 30:1. Hand thinning also increased total soluble solids (TSS)...

Chemical and physicochemical characteristics changes during passion fruit juice processing

Fernandes,Aline Gurgel; Santos,Gerusa Matias dos; Silva,Daniele Sales da; Sousa,Paulo Henrique Machado de; Maia,Geraldo Arraes; Figueiredo,Raimundo Wilane de
Fonte: Sociedade Brasileira de Ciência e Tecnologia de Alimentos Publicador: Sociedade Brasileira de Ciência e Tecnologia de Alimentos
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2011 Português
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37.43658%
Passion fruit is widely consumed due to its pleasant flavour and aroma acidity, and it is considered very important a source of minerals and vitamins. It is used in many products such as ice-cream, mousses and, especially, juices. However, the processing of passion fruit juice may modify the composition and biodisponibility of the bioactive compounds. Investigations of the effects of processing on nutritional components in tropical juices are scarce. Frequently, only losses of vitamin C are evaluated. The objective of this paper is to investigate how some operations of passion fruit juice processing (formulation/homogeneization/thermal treatment) affect this product's chemical and physicochemical characteristics. The results showed that the chemical and physicochemical characteristics are little affected by the processing although a reduction in vitamin C contents and anthocyanin, large quantities of carotenoids was verified even after the pasteurization stage.

Investigation on Early Softening of Kiwi Fruit

Streif, J.; Cooper C., Tomás
Fonte: Universidade do Chile Publicador: Universidade do Chile
Tipo: Artículo de revista
Português
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37.549082%
Early softening is the main problem for the exports of Chilean kiwi fruit. It has been related to orchard condition and to harvest and postharvest handling. In this investigation, experiments were carried out to test the influence of growing conditions and some fruit characteristics on the softening rate of kiwi fruit, from different orchard in the central zone of Chile. Fruits from all orchards were harvested at 6.2-6.5 soluble solid content, and kept under the same storage condition (0°C, regular air). Samples were taken every fifteen days to determine softening index (S.I.), which was calculated by the initial firmness minus final firmness, divided by the days till the fruit reached 20 N of firmness. There was a large variation in S.I. between orchards and also in the same orchard. The fruit characteristics assayed were size, position and illumination of fruit in the plant. For this purpose fruit from the same plants were harvested and tested in the same way as described before. The influence of size on early softening was found in 3 of the 4 orchards tested, having the larger fruit the lowest firmness loss. The position on the fruit on the plant (distance from the base of the cane) had no clear influence on fruit firmness. The fruit from better illuminated part of the plant had higher initial firmness...

Manganese deficiency in peach trees: prognosis and fruit quality

Val Falcón, Jesús; Montañés García, Luis; Sanz Encinas, Manuel
Fonte: International Society for Horticultural Science Publicador: International Society for Horticultural Science
Tipo: Comunicación de congreso Formato: 18106 bytes; application/pdf
Português
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46.9399%
The definitive version is available at: http://www.actahort.org/; In previous studies was pointed out that it may be possible to detect subclinical manganese deficiencies in the field before visual symptoms have developed. In this work, by in situ fluorescence measurements, we demonstrate that it is possible to predict, at the beginning of the season, which trees will develop manganese deficiency several months later. Fo/Fm ratio of young manganese deficient leaves without visible symptoms was higher than the measured in the equivalent control leaves. More than 80% of concordance, between the initial measurements and the symptoms lately developed was reached. This facts made us to believe that it could be possible to predict manganese deficiency just when the first leaves appeared and therefore apply effective correcting measures to prevent manganese deficiency in peach trees. Economical repercussions of manganese deficiency, in terms of yield and fruit characteristics, are also discussed.; Peer reviewed