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	Provedor de dados Biota Neotropica (1) BJM (1) Autor Arana-Chavez,Victor E. (1) Avila-Campos,Mario J. (1) Gaetti-Jardim Jr.,Elerson (1) Garcia,Marinês (1) Odebrecht,Clarisse (1) Okamoto,Ana C. (1) Mais... Palavra-chave Ultra-structure (2) Adherence (1) Antimicrobial (1) Biogeography (1) Fusobacterium nucleatum (1) Hydrophobicity (1) Phytoplankton (1) Seasonal variation (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2008 (1) 2002 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 145 Primeira ... 1 2 3 4 5 6 7 8 ... Última Tipificación y caracterización de café comercial mediante métodos instrumentales y quimiometría. Colegio de Postgraduados Vázquez Hernández, Lorena. El control de calidad de los productos agroalimentarios está basado en su caracterización bioquímica, como una de las partes esenciales. Para el caso del café, la composición química está fuertemente relacionada con las condiciones agroecológicas (suelo, clima, altura, etc.) de cada una de las regiones productoras. El café es la segunda materia prima en importancia en el mercado nacional, por lo cual, la calidad es importante para este producto. Para asegurarnos de la calidad del café tanto para los consumidores como productores existe la necesidad de establecer métodos analíticos, rápidos, objetivos y sensitivos. Para realizar la caracterización del café comercial existen métodos convencionales establecidos en la Norma Mexicana (NMX-F-013-SCFI-2000),... Palavras-chave: Café; Quimiometría; NIRS; Homogeneidad; PCA; SIMCA; Coffee; Chemometrics; Homogeneity; Maestría; Producción Agroalimentaria en el Trópico. Ano: 2011 URL: http://hdl.handle.net/10521/561 Colonización micorrízica y diversidad de hongos micorrízicos de algunas especies de orquídeas epifitas tropicales en el Sureste de Chiapas, México Colegio de Postgraduados Cruz Blasi, Jesús. El status de la colonización micorrízica, los factores que la influyen y la diversidad fúngica asociada, fue investigada en orquídeas de hábitos epifitos que crecen en las ramitas de los cafetales y en árboles remanentes de la selva tropical del Sureste de México. El 97% de los individuos presentaron algún grado de colonización micorrízica. La intensidad de colonización estuvo inversamente relacionada con el diámetro de la raíz. Orquídeas de raíces delgadas estuvieron intensamente colonizadas, alcanzando en algunos casos hasta 98%. Así también, existió una relación positiva entre la edad de las raíces y su intensidad de colonización. Las raíces más viejas concentraron la mayor colonización. En términos generales, las células recién colonizadas se... Tipo: Tesis Palavras-chave: Rhizoctonia; Epulorhiza; Ceratorhiza; Micorriza orquideoide; Orquideas epifitas; Selva tropical húmeda; Cafetales; Orquídeas de ramitas; Maestría; Edafología; Orchid mycorrhiza; Epiphytic orchids; Rain tropical forest; Coffee; Twig orchids. Ano: 2007 URL: http://hdl.handle.net/10521/1258 Alteración de la fertilidad del suelo atribuible al cambio climático y su impacto sobre la productividad de café en el Estado de Veracruz, México. Colegio de Postgraduados Brigido Morales, Juan Gabriel. Todas las investigaciones sobre el cambio climático global indican que éste se ve fortalecido con el incremento en la concentración de gases, principalmente CO2. También se ha encontrado que este incremento pueden intensificar las condiciones climáticas medias normales dentro de las que históricamente se ha dado el desarrollo de la agricultura por lo que ésta se vuelve vulnerable, siendo afectada su productividad. El objetivo principal del presente trabajo fue estimar el papel de la posible modificación del índice de fertilidad del suelo debido al cambio climático en los cálculos de la productividad del cultivo de café (Coffea arabica L.) para 20 municipios cafetaleros del estado de Veracruz utilizando 3 escenarios de cambio climático para México... Palavras-chave: Vulnerabilidad; Agricultura; Índice hidrotérmico local; Índice integral de fertilidad del suelo; Café; Escenarios de cambio climático; Vulnerability; Agriculture; Local hydrothermal index; Integral soil fertility index; Coffee; Climate change scenarios; Hidrociencias; Maestría. Ano: 2014 URL: http://hdl.handle.net/10521/2219 Tipificación y caracterización de café comercial mediante métodos instrumentales y quimiometría. Colegio de Postgraduados Vázquez Hernández, Lorena. El control de calidad de los productos agroalimentarios está basado en su caracterización bioquímica, como una de las partes esenciales. Para el caso del café, la composición química está fuertemente relacionada con las condiciones agroecológicas (suelo, clima, altura, etc.) de cada una de las regiones productoras. El café es la segunda materia prima en importancia en el mercado nacional, por lo cual, la calidad es importante para este producto. Para asegurarnos de la calidad del café tanto para los consumidores como productores existe la necesidad de establecer métodos analíticos, rápidos, objetivos y sensitivos. Para realizar la caracterización del café comercial existen métodos convencionales establecidos en la Norma Mexicana (NMX-F-013-SCFI-2000),... Palavras-chave: Café; Quimiometría; NIRS; Homogeneidad; PCA; SIMCA; Coffee; Chemometrics; Homogeneity; Maestría; Producción Agroalimentaria en el Trópico. Ano: 2011 URL: http://hdl.handle.net/10521/561 Análisis técnico-económico de la Cooperativa Cafetalera Juan Ramón Corea bajo los principios de las Buenas Prácticas Agrícolas, ciclo agrícola 2009/2010. Colegio de Postgraduados Cuadra Franco, Luis Alberto. Las exigencias de inocuidad en el mercado internacional del café están empujando a los productores a cambiar las prácticas inapropiadas de manejo del cultivo del café. Para hacer frente a esta situación las instituciones públicas junto con el sector cafetalero impulsan la implementación de las Buenas Prácticas Agrícolas (BPA) en la producción primaria de café. El objetivo del estudio fue analizar el efecto de un protocolo básico de BPA sobre la utilidad neta y el margen de ganancia y su viabilidad bajo las condiciones socioeconómicas de los socios de la cooperativa Juan Ramón Corea. Así, se estudiaron 29 pequeñas fincas cafetaleras en las cuales se reconstruyó el itinerario técnico ejecutado durante el ciclo agrícola 2008/2009, haciendo énfasis en los... Palavras-chave: Inocuidad; Buenas prácticas agrícolas; Rendimiento; Café; Utilidad neta; Safety food; Good Agricultural Practice; Yield; Coffee; Net income; Maestría Tecnológica; EDAR; Desarrollo Rural Territorial Sustentable CP-UNAN. Ano: 2010 URL: http://hdl.handle.net/10521/323 Are Local People Conservationists? Analysis of Transition Dynamics from Agroforests to Monoculture Plantations in Indonesia Ecology and Society Schwarze, Stefan; Department of Agricultural Economics and Rural Development Georg-August-Universitaet Goettingen, Germany; sschwar1@gwdg.de; Levang, Patrice; IRD, Montpellier, France; CIFOR, Bogor, Indonesia; patrice.levang@mpl.ird.fr. Tipo: Peer-Reviewed Reports Palavras-chave: Agrarian transition; Agricultural intensification; Agroforestry; Cocoa; Coffee; Cropping trajectory; Indonesia; Oil palm; Rubber. Ano: 2010 Responding to Globalization: Impacts of Certification on Colombian Small-Scale Coffee Growers Ecology and Society Rueda, Ximena; Department of Environmental Earth System Science, School of Earth Sciences, Stanford University; School of Management, Universidad de los Andes; xrueda@alum.mit.edu. Eco-certification of food and other agricultural products has been promoted as a way of making markets work for sustainability. Certification programs offer a price premium to producers who invest in more sustainable practices. The literature on the impacts of certification has focused primarily on the economic benefits farmers perceive from participating in these schemes. These benefits, however, are often subject to price variability, offering only a partial explanation of why farmers join and stay in certification programs. We evaluated the potential of the Rainforest Alliance certification program to foster more resilient social-ecological systems in the face of globalization. Using the case of Santander, Colombia, and a pair-based comparison of 86... Tipo: Peer-Reviewed Reports Palavras-chave: Coffee; Colombia; Eco-certification; Globalization; Land change. Ano: 2013 Plant regeneration via indirect somatic embryogenesis and optimisation of genetic transformation in Coffea arabica L. cvs. Caturra and Catuaí Electron. J. Biotechnol. Gatica-Arias,Andrés M; Arrieta-Espinoza,Griselda; Espinoza Esquivel,Ana M. A protocol for Coffea arabica L. cvs. Caturra and Catuaí plant regeneration via indirect somatic embryogenesis (ISE) was established. Furthermore, a biolistic mediated genetic transformation protocol was optimized for Catuaí callus aggregates. Maximum callus induction was obtained when Caturra (87%) and Catuaí (67%) leaves were cultured on Murashige and Skoog medium with 18.56 µM kinetin and 4.52 µM2,4-dichlorophenoxyacetic acid (2,4-D). Catuaí suspension cultures were established from embryogenic callus using liquid proliferation CP and Sli media and diffused light and darkness. The higher suspension cultures fresh weight was obtained using Erlenmeyer (1425.4 ± 354.9 mg) than Recipient for Automated Temporary Immersion System (RITA®) (518.6 ± 55.1 mg),... Tipo: Journal article Palavras-chave: Bioreactor; Coffee; Genetic transformation; Somatic embryogenesis; Suspension cultures. Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000100010 Viability in protoplasts and cell suspensions of Coffea arabica cv. Catimor Electron. J. Biotechnol. Fernandez-Da Silva,Rafael; Menéndez-Yuffá,Andrea. Two methods were evaluated in order to assess the viability of protoplasts and cell suspensions of Coffea arabica cv. Catimor used in a protocol of transformation by electroporation. One method consisted of staining with 1 % Evans blue and the other staining with 1% 3-[4,5-dimethyltiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT). When Evans blue was applied to viable cells and protoplasts they either did not stain or acquired a faint blue colour. However, it was difficult to distinguish the non-viable cells in the wide spectrum of clear blue tonalities. In contrast, with the MTT assay only the viable cells and protoplasts reduced this salt to the red coloured formazan; viable and non-viable cells were distinguished more clearly with MTT than with Evans... Tipo: Journal article Palavras-chave: Cell suspensions; Cell viability; Coffee; Evans blue; MTT; Protoplasts. Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000500016 RELATIONSHIP BETWEEN COFFEE CROP PRODUCTIVITY AND VEGETATION INDEXES DERIVED FROM OLI / LANDSAT-8 SENSOR DATA WITH AND WITHOUT TOPOGRAPHIC CORRECTION REA Nogueira,Sulimar M. C.; Moreira,Maurício A.; Volpato,Margarete M. L.. ABSTRACT The reflectance values of a coffee crop are influenced by several factors such as planting direction, crop spacing, time of the year, plant age and topography which reduces the accuracy of the estimates derived from remote sensing data. In this context were evaluated the relationships between coffee productivity and values of NDVI, SAVI and NDWI vegetation indexes with and without topographic reflectance correction for different coffee phenological phases for the crop years 2013/2014 (low productivity) and 2014/2015 (high productivity). The evaluations were made through the standard deviation of vegetation indices (VIs), linear relationship between the cosine factor and the VIs and between VIs and coffee productivity. The best phenological phases... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee; NDVI; NDWI; Yield; SAVI; Remote sensing. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300387 Energetic sustainability of three arabica coffee growing systems used by family farming units in Espírito Santo state REA Muner,Lúcio H. de; Masera,Omar; Fornazier,Maurício J.; Souza,Cássio V. de; Loreto,Maria Das D. S. de. Three growing systems of Arabica coffee were evaluated under the energy perspective, in the state of Espírito Santo in Brazil. The systems are conventional cultivation (CC), cultivation with good agricultural practices (CGP) and organic farming (OF). It was made a comparison of the energy flows within these three systems to show sustainable levels of each one based on production average data of several family-farming units. Therefore, we analyzed crop yield, total energy efficiency reverse (TEER), energy efficiency of ripe coffee (EERC) and non-renewable energy efficiency (NREE). OF system had values for TEER, EERC and NREE of 3.3 4.7 and 7.9 respectively. Yet CC showed values of 1.8, 1.9 and 1.6 for TEER, EERC and NREE respectively. Furthermore, CGP... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agroecosystem; Energy analysis; Coffee; Crop yield; Sustainability. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300397 Leaf-associated bacterial microbiota of coffee and its correlation with manganese and calcium levels on leaves Genet. Mol. Biol. Sousa,Leandro Pio de; Silva,Marcio José da; Costa Mondego,Jorge Maurício. Abstract Coffee is one of the most valuable agricultural commodities and the plants’ leaves are the primary site of infection for most coffee diseases, such as the devastating coffee leaf rust. Therefore, the use of bacterial microbiota that inhabits coffee leaves to fight infections could be an alternative agricultural method to protect against coffee diseases. Here, we report the leaf-associated bacteria in three coffee genotypes over the course of a year, with the aim to determine the diversity of bacterial microbiota. The results indicate a prevalence of Enterobacteriales in Coffea canephora, Pseudomonadales in C. arabica ‘Obatã’, and an intriguing lack of bacterial dominance in C. arabica ‘Catuaí’. Using PERMANOVA analyses, we assessed the association... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee; Bacteria; 16S; Leaf; Manganese; Calcium. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000300455 Identification of novel and conserved microRNAs in Coffea canephora and Coffea arabica Genet. Mol. Biol. Loss-Morais,Guilherme; Ferreira,Daniela C.R.; Margis,Rogério; Alves-Ferreira,Márcio; Corrêa,Régis L.. As microRNAs (miRNAs) are important regulators of many biological processes, a series of small RNAomes from plants have been produced in the last decade. However, miRNA data from several groups of plants are still lacking, including some economically important crops. Here microRNAs from Coffea canephora leaves were profiled and 58 unique sequences belonging to 33 families were found, including two novel microRNAs that have never been described before in plants. Some of the microRNA sequences were also identified in Coffea arabica that, together with C. canephora, correspond to the two major sources of coffee production in the world. The targets of almost all miRNAs were also predicted on coffee expressed sequences. This is the first report of novel miRNAs... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee; MicroRNA profiling; Illumina sequencing. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000500010 Development of microsatellite markers for identifying Brazilian Coffea arabica varieties Genet. Mol. Biol. Vieira,Elisa S.N.; Von Pinho,Édila V. de R.; Carvalho,Maria G.G.; Esselink,Danny G.; Vosman,Ben. Microsatellite markers, also known as SSRs (Simple Sequence Repeats), have proved to be excellent tools for identifying variety and determining genetic relationships. A set of 127 SSR markers was used to analyze genetic similarity in twenty five Coffea arabica varieties. These were composed of nineteen commercially important Brazilians and six interspecific hybrids of Coffea arabica, Coffea canephora and Coffea liberica. The set used comprised 52 newly developed SSR markers derived from microsatellite enriched libraries, 56 designed on the basis of coffee SSR sequences available from public databases, 6 already published, and 13 universal chloroplast microsatellite markers. Only 22 were polymorphic, these detecting 2-7 alleles per marker, an average of... Tipo: Info:eu-repo/semantics/article Palavras-chave: SSR; Coffee; Genetic similarity; Molecular marker. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300022 Galactinol synthase transcriptional profile in two genotypes of Coffea canephora with contrasting tolerance to drought Genet. Mol. Biol. Santos,Tiago Benedito Dos; Lima,Rogério Barbosa de; Nagashima,Getúlio Takashi; Petkowicz,Carmen Lucia de Oliveira; Carpentieri-Pípolo,Valéria; Pereira,Luiz Filipe Protasio; Domingues,Douglas Silva; Vieira,Luiz Gonzaga Esteves. Increased synthesis of galactinol and raffinose family oligosaccharides (RFOs) has been reported in vegetative tissues in response to a range of abiotic stresses. In this work, we evaluated the transcriptional profile of a Coffea canephora galactinol synthase gene (CcGolS1) in two clones that differed in tolerance to water deficit in order to assess the contribution of this gene to drought tolerance. The expression of CcGolS1 in leaves was differentially regulated by water deficit, depending on the intensity of stress and the genotype. In clone 109A (drought-susceptible), the abundance of CcGolS1 transcripts decreased upon exposure to drought, reaching minimum values during recovery from severe water deficit and stress. In contrast, CcGolS1 gene expression... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee; Drought stress; Raffinose family oligosaccharides (RFOs). Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000200182 Altered expression of the caffeine synthase gene in a naturally caffeine-free mutant of Coffea arabica Genet. Mol. Biol. Maluf,Mirian Perez; Silva,Carla Cristina da; Oliveira,Michelle de Paula Abreu de; Tavares,Aline Gomes; Silvarolla,Maria Bernadete; Guerreiro Filho,Oliveiro. In this work, we studied the biosynthesis of caffeine by examining the expression of genes involved in this biosynthetic pathway in coffee fruits containing normal or low levels of this substance. The amplification of gene-specific transcripts during fruit development revealed that low-caffeine fruits had a lower expression of the theobromine synthase and caffeine synthase genes and also contained an extra transcript of the caffeine synthase gene. This extra transcript contained only part of exon 1 and all of exon 3. The sequence of the mutant caffeine synthase gene revealed the substitution of isoleucine for valine in the enzyme active site that probably interfered with enzymatic activity. These findings indicate that the absence of caffeine in these... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee; Cup quality; Differential expression; Naturally decaffeinated. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400023 Genome-wide identification, classification and transcriptional analysis of nitrate and ammonium transporters in Coffea Genet. Mol. Biol. Santos,Tiago Benedito dos; Lima,Joni Esrom; Felicio,Mariane Silva; Soares,João Danillo Moura; Domingues,Douglas Silva. Abstract Nitrogen (N) is quantitatively the main nutrient required by coffee plants, with acquisition mainly by the roots and mostly exported to coffee beans. Nitrate (NO3–) and ammonium (NH4+) are the most important inorganic sources for N uptake. Several N transporters encoded by different gene families mediate the uptake of these compounds. They have an important role in source preference for N uptake in the root system. In this study, we performed a genome-wide analysis, including in silico expression and phylogenetic analyses of AMT1, AMT2, NRT1/PTR, and NRT2 transporters in the recently sequenced Coffea canephora genome. We analyzed the expression of six selected transporters in Coffea arabica roots submitted to N deficiency. N source preference was... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee; Nitrogen transport; Nitrogen uptake; Gene family evolution. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200346 O cultivo do cafeeiro no Estado do Pará. Infoteca-e OLIVEIRA, R. P. de. bitstream/item/61966/1/Belem-Doc6.pdf Tipo: Documentos (INFOTECA-E) Palavras-chave: Cultivo; Preparo; Coffee; Cultivation; Preparation; Seedling; Seed; Fertilizer; Pest; Disease; Revenue.; Adubação; Coffea Arábica; Café; Comercialização; Doença; Muda; Praga; Semente.; Rendimento; Commercialization.. Ano: 1988 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381132 Banco de sementes de café em criopreservação: experiência inédita no Brasil. Infoteca-e EIRA, M. T. S.; REIS, R. B.; RIBEIRO, F. N. S.; RIBEIRO, V. S.. bitstream/CENARGEN/26622/1/ct042.pdf Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Banco; Coffee; Bank.; Café; Armazenamento; Criopreservação; Germinação; Germoplasma.; Coffea; Germination; Germplasm.; Cryopreservation. Ano: 2005 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/187030 Transformações biológicas e microbiológicas ocorridas no solo de um cafezal convencional em conversão para orgânico. Infoteca-e RICCI, M. dos S. F.; AQUINO, A. M. de; SILVA, E. M. R. da; PEREIRA, J. C.; REIS, V. M.. bitstream/CNPAB-2010/27160/1/cot031.pdf Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Coffee; Organic agriculture.; Agricultura Orgânica; Café; Fungo; Solo.; Fungi; Soil.. Ano: 1999 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/623841 Registros recuperados: 145 Primeira ... 1 2 3 4 5 6 7 8 ... Última

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