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| Registros recuperados: 57 | |
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| Rosa,Viviane Gomes Cardoso da; Moreira,Maurício Alves; Rudorff,Bernardo Friedrich Theodor; Adami,Marcos. |
| O objetivo deste trabalho foi avaliar um modelo agrometeorológico-espectral, para estimar a produtividade de cafezais. Utilizaram-se imagens do sensor MODIS e dados agrometeorológicos do modelo regional de previsão do tempo (ETA), para fornecer as variáveis de entrada para o modelo agrometeorológico-espectral da mesorregião geográfica sul/sudoeste do estado de Minas Gerais nos anos-agrícolas de 2003/2004 a 2007/2008. A variável espectral de entrada do modelo agrometeorológico-espectral, índice de área foliar (IAF), usada no cálculo da produtividade máxima, foi estimada com o índice de vegetação por diferença normalizada (NDVI), obtido de imagens MODIS. Outras variáveis de entrada no modelo foram: dados meteorológicos gerados pelo modelo ETA e a capacidade... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Estatísticas agrícolas; Índice de área foliar; Modelagem; Sensoriamento remoto. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001200020 |
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| BAÚ,SANDRA M. T.; MAZZAFERA,PAULO; SANTORO,LUIZ G.. |
| It has been reported that Coffea arabica seeds contain as the main reserve protein, a legumin-like protein, constituted of two subunits, alpha and beta, of approximately 35 and 20 kDa. In this work the seed proteins of several coffee species and varieties were investigated by SDS-PAGE and gel filtration. No differences were observed in the electrophoretic profiles among varieties of C. arabica, however, marked differences were observed among species, or even among individuals of some species. In general, the molecular weight of the subunits alpha and beta accounted for a monomer of 48 to 62 kDa. However, native molecular weight obtained by gel filtration showed that for most of the species there is association of 6 of such proteins, in a hexamer. The most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Legumin; Endosperm. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000100004 |
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| COSTA,José Nilton Medeiros; SILVA,Rachel Barbosa da; RIBEIRO,Paulina de Araújo; GARCIA,Alvanir. |
| Em trabalho efetuado visando o levantamento de inimigos naturais da broca-do-café (Hypothenemus hampei, Ferrari) no estado de Rondônia, verificou-se a ocorrência do fungo Beauveria bassiana (Bals.) Vuill. conforme identificação da Embrapa Rondônia. Os frutos de café foram coletados em cafezais da cultivar Conilon (Coffea canephora), nos municípios de Rolim de Moura, Ouro Preto do Oeste e Machadinho do Oeste, Rondônia, nos meses de fevereiro a março de 2000. A percentagem média de infecção de B. bassiana em frutos broqueados variou de 0,23% a 0,47%, sendo menor que em outras regiões do Brasil. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beauveria bassiana; Hypothenemus hampei; Coffea; Sp; Broca-do-café; Café. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672002000300517 |
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| MAZZAFERA,PAULO; SOAVE,DAYSE; ZULLO,MARCO ANTONIO TEIXEIRA; GUERREIRO FILHO,OLIVEIRO. |
| The oil content was determined in seeds of several continental African species of the coffee germplasm bank of Instituto Agronômico de Campinas, State of São Paulo, Brazil. Oil was extracted from seeds with hexane in Soxhlet apparatus. Due to the economic importance, C. arabica and C. canephora have been the best studied species concerning oil content and composition, and the results obtained are in agreement with the reported in the literature. On the other hand, only one report in the literature describes the results of oil analyses in other few species of the African continent, although it does not allow comparison with our results. The oil content of most of the species varied from 9 to 15%, therefore, similar to the range observed for C. arabica and... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: African coffee species; Coffea; Oil content. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051998000100006 |
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| Queiroz-Voltan,Rachel Benetti; Cabral,Luciane Perosin; Fazuoli,Luiz Carlos; Paradela Filho,Osvaldo. |
| A bactéria Xylella fastidiosa Wells et al. foi detectada pela primeira vez em cafeeiro no Brasil, em 1995, entretanto acredita-se que a cultura foi infectada por essa bactéria há muitos anos, embora os sintomas fossem atribuídos a um estresse nutricional. Até o momento têm sido realizados estudos principalmente com espécies de C. arabica e C. canephora, porém, em outras espécies do gênero, somente foi detectada sua presença. Neste trabalho, objetivou-se avaliar a proporção de elementos de vaso do xilema obstruídos, total e parcialmente, pela X. fastidiosa, naturalmente infectadas, em diferentes espécies de cafeeiro do Banco de Germoplasma do IAC, visando identificar material resistente a essa bactéria para ser utilizado no programa de melhoramento... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Obstrução do xilema; Bactéria. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052005000400011 |
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| Shigueoka,Luciana Harumi; Sera,Gustavo Hiroshi; Sera,Tumoru; Fonseca,Inês Cristina de Batista; Andreazi,Elder; Carvalho,Filipe Gimenez; Carducci,Fernando Cesar; Ito,Dhalton Shiguer. |
| ABSTRACT The aim of this study was to evaluate the reaction of Arabica coffee progenies derived from Icatu to Meloidogyne paranaensis. The experiment was conducted under screenhouse conditions at Instituto Agronômico do Paraná (IAPAR) in Londrina, Paraná State, Brazil. Seedlings with three to four pairs of leaves were inoculated with 5,000 M. paranaensis eggs and second-stage juveniles (J2). Four F4 progenies of HN 87609 derived from Icatu H4782-7-925 were evaluated. C. arabica cv. Catuaí Vermelho IAC 81 and C. arabica cv. IPR 100 were susceptible and resistant checks, respectively. The experiment was conducted in a randomized blocks design with 14 replications of one plant per plot. Assessments were performed 120 days after inoculation. The number of eggs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Breeding; Root-knot nematode; Resistance. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200193 |
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| Medina Filho,Herculano Penna; Carvalho,Alcides; Ballve,Rosa Maria Lizana; Bordignon,Rita; Silvarolla,Maria Bernadete; Lima,Marinez Muraro Alves de; Fazuoli,Luiz Carlos. |
| Encontrou-se, anos atrás, em uma lavoura de Coffea arabica (2n = 44), uma forma de café bastante distinta das demais. Inicialmente, julgou-se tratar de um cafeeiro autotetraplóide de C. liberica (2n = 22) ou de C. dewevrei (2n = 22). Estudos morfológicos e citológicos de tal cafeeiro, denominado Piatã (prefixo C387 da Seção de Genética do IAC), assim como de seus descendentes, indicaram tratar-se, provavelmente, de um híbrido natural derivado da união de um gameta normal de C. arabica e de um não reduzido de C. dewevrei. No presente trabalho, os estudos dos padrões eletroforéticos das enzimas PGI, PGM e ADH do endosperma de sementes confirmaram a origem interespecífica do café Piatã. A combinação de alelos dessas enzimas é distinta e específica para C.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; C. dewevrei; C. arabica; Isoenzimas; Híbrido interespecífico. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051995000200005 |
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| RAMOS,LUIS CARLOS DA SILVA; CARVALHO,ALCIDES. |
| Roots and shoots from seedlings of 29 coffee genotypes were studied to better characterize the entries from the Coffea germplasm bank of the Instituto Agronômico (IAC), Campinas, State of São Paulo, Brasil. The varieties were seeded in a randomized complete block design with 6 replications and 10 plants per plot. The characters evaluated were: plant (PL), shoot (SL) and root (RL) length; total plant (PDM), shoot (SDM), root (RDM) and lateral root (LRDM) dry matter. A lateral root index (LRI) and shoot root dry matter (SRDM = SDM/RDM) and length ratios; (SRL = SL/RL) were calculated. The dwarf varieties (Catuaí, Icatu-caturra, Vila Sarchi, San Ramon, Vila Lobos, São Bernardo) presented higher LRDM and lower SDM than the normal size varieties such as Mundo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Coffee; Varieties; Seedlings; Shoots; Roots; Coffea. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051997000100006 |
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| Sera,Gustavo Hiroshi; Sera,Tumoru; Ito,Dhalton Shiguer; Ribeiro Filho,Claudionor; Villacorta,Amador; Kanayama,Fabio Seidi; Alegre,Clayton Ribeiro; Del Grossi,Leandro. |
| The aim of this study was to evaluate the coffee germplasm of the Paraná Agronomic Institute (IAPAR) for resistance to the coffee-berry-borer. Preliminary field evaluation was performed in August 2004 and the fruits of less damaged genotypes in the field were evaluated under controlled condition with obligated and free choice experiments established in a randomized complete design with three replications. The genotypes were evaluated fifteen days after infestation with one borer per fruit in Petri dishes. The data were analyzed by the Scott-Knott means test at 1 % and by the χ2 test. Statistical analysis indicated that Coffea kapakata, Psilanthus bengalensis, C. eugenioides and genotypes with C. eugenioides genes were resistant. These genotypes presented... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Coffea; Cultivars; Hypothenemus hampei; Psilanthus. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200003 |
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| Del Grossi,Leandro; Sera,Tumoru; Sera,Gustavo Hiroshi; Fonseca,Inês Cristina de Batista; Ito,Dhalton Shiguer; Shigueoka,Luciana Harumi; Andreazi,Elder; Carvalho,Filipe Gimenez. |
| The objective of the study was to evaluate the resistance to rust in coffee cultivars developed by research institutes of Brazil in Paraná state. Resistance to the local leaf rust races was assessed in high disease intensity field conditions at Londrina and Congonhinhas in 2009 and 2010.The cultivars were developed by the EPAMIG/UFV, IAPAR, IAC and MAPA/Procafé. The resistant standard 'IAPAR 59' and the susceptible standards Catuaí Vermelho IAC 144' and 'Bourbon Amarelo' were used. A randomized block design with three replications and plots with 10 plants was used. A scale from 1 to 5 based on the rust intensity was used to evaluate the resistance. The Catiguá MG 1, Catiguá MG 2, IAPAR 59, IPR 98, IPR 104, Palma II, Paraíso H-419-10-6-2-5-1, Paraíso... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Coffea; Hemileia vastatrix; Híbrido de Timor; SH genes. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000100004 |
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| Crochemore,Maria Lúcia; Nunes,Liliane Moreira; Andrade,Giselly Aparecida; Molinari,Hugo Bruno Correa; Vasconcellos,Maria Elizabeth. |
| This study aimed the identification of cultivars and/or lines of Coffea arabica of commercial interest, using PCR-RAPD markers. The DNA of ground seeds lots of 12 cultivars and/or lines were evaluated with five primers (Operon OPA 01, OPA 04, OPG 11, OPY 16, and OPX 09) were obtained from a selection of 56 primers. The electrophoretic profiles allowed distinction among eight cultivars and/or lines as well as heterogeneity between and within lots of IAPAR59. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Cultivar identification; Molecular marker. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000100002 |
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| Speer,Karl; Kölling-Speer,Isabelle. |
| The lipid fraction of coffee is composed mainly of triacylglycerols, sterols and tocopherols, the typical components found in all common edible vegetable oils. Additionally, the so-called coffee oil contains diterpenes of the kaurene family in proportions of up to 20 % of the total lipids. Diterpenes are of interest because of their analytical and physiological effects. The composition of the main lipid components of the two most important coffee species, Coffea arabica and Coffea canphora var. Robusta is presented. In addition, the influences of typical processes like roasting and steaming on selected lipid components as well as the effects of the storage of green coffee beans under different conditions will be described. Furthermore, new findings... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Coffee oil; Coffee wax; Diterpenes; 5-hydroxytryptamides. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100014 |
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| Eira,Mirian T. S.; Silva,E. A. Amaral da; De Castro,Renato D.; Dussert,Stéphane; Walters,Christina; Bewley,J. Derek; Hilhorst,Henk W. M.. |
| Considerable advances in our understanding of coffee seed physiology have been made in recent years. However, despite intense research efforts, there are many aspects that remain unclear. This paper gives an overview of the current understanding of the more important features concerning coffee seed physiology, and provides information on recent findings on seed development, germination, storage and longevity. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Coffee; Germination; Germplasm; Longevity; Seed development; Storage. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100011 |
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| Ashihara,Hiroshi. |
| Coffee beans contain two types of alkaloids, caffeine and trigonelline, as major components. This review describes the distribution and metabolism of these compounds. Caffeine is synthesised from xanthosine derived from purine nucleotides. The major biosynthetic route is xanthosine -> 7-methylxanthosine -> 7-methylxanthine -> theobromine -> caffeine. Degradation activity of caffeine in coffee plants is very low, but catabolism of theophylline is always present. Theophylline is converted to xanthine, and then enters the conventional purine degradation pathway. A recent development in caffeine research is the successful cloning of genes of N-methyltransferases and characterization of recombinant proteins of these genes. Possible biotechnological... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Caffeine; Purine alkaloids; Pyridine alkaloids; Theobromine; Trigonelline. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100001 |
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| Registros recuperados: 57 | |
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