Biblioteca do Café
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Item Selection of genotypes of Coffea arabica for drought tolerance based on anatomical and physiological characteristics(Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2025-03-31) Santos, Cyntia Stephânia dos; Freitas, Ana Flávia de; Silva, Glauber Henrique Barbosa da; Tavares, Maria Clara dos Santos; Carvalho, Milene Alves de Figueiredo; Santos, Meline de Oliveira; Carvalho, Gladyston Rodrigues; Silva, Vânia AparecidaClimate change affects crop productivity, with forecasts for the coming years pointing to increased temperatures and changes in rainfall distribution. This paper aimed to identify genotypes of Coffea arabica that are potentially drought-tolerant. Seven germplasm genotypes of Timor Hybrid were evaluated in comparison to two cultivars considered as sensitive and drought-tolerant. These were submitted to two water treatments, the first maintaining water availability and the second with complete suspension of irrigation. The physiological characteristics analyzed were gas exchange and predawn leaf water potential. For leaf anatomy, characteristics of the leaf lamina, conductive vessels and stomata were evaluated. It was found that some genotypes were able to maintain gas exchange even under low water availability. For these genotypes, the analysis of leaf anatomy presented an increase in cuticle thickness on the adaxial face, in the relationship between polar and equatorial diameters of stomata, in addition to a lower vulnerability index. A positive relationship was observed between adaxial phase cuticle thickness and water use efficiency. The Timor Hybrid UFV 377-21, UFV 376-31 and the cultivar IPR100 were the highlights among the genotypes analyzed, which presented adaptations that allowed the maintenance of the hydric status in the initial development phase.Item Potential of new Coffea arabica cultivars for renewal of Meloidogyne paranaensis infested crop(Instituto Agronômico (IAC), 2025-06-09) Luz, Silvana Ramlow Otto Teixeira da; Teixeira, Lívia Pimenta; Salgado, Sonia Maria de Lima; Andrade, Vinícius Teixeira; Marques, Elizabeth Rosemeire; Botelho, Cesar Elias; Fatobene, Bárbhara Joana dos Reis; Carvalho, Gladyston RodriguesMeloidogyne paranaensis is one of the most damaging species of root-knot nematode to coffee trees. The development of resistant cultivars is crucial to the continuity of cultivation in infested areas. Thus, the aims of this study were to assess the performance of F6:7 progenies derived from the Amphillo germplasm in an infested area and to validate the new Coffea arabica MGS Vereda and MGS Guaiçara cultivars. The Catuaí Amarelo IAC 62 cultivar was used as the susceptible standard, and IPR 100 as the resistance standard. The experiment was conducted in 2018 using a randomized complete block design with four replications and 15 plants per plot. Resistance related and agronomic traits were assessed over four years. The lowest population of M. paranaensis was observed in progenies 88, 44B, and 105 from MGS Guaiçara, MGS Vereda, and IPR 100 cultivars, respectively. The progenies with the lowest population of M. paranaensis, although resistant, were not productive. The new MGS Vereda cultivar stood out in terms of yield and early fruit ripening, with the highest proportion of cherry fruit at harvest and a low incidence of peaberry grain. The results suggest MGS Vereda cultivar’s potential for the renewal of coffee cultivations occurs in a rainfed system according to the environmental conditions of the experiment.Item Sensory perception of coffee consumers as a function of different genotypes and extraction methods(Universidade Federal Rural de Pernambuco, 2024-09-30) Nadaleti, Denis Henrique Silva; Sousa, Maísa Mancini Matioli de; Ribeiro, Michele Nayara; Vilela, Diego Júnior Martins; Pereira, Dyanna Rangel; Carvalho, Gladyston RodriguesCoffee is one of the most consumed beverages in the world, with unique organoleptic characteristics of aroma and flavor, also varying according to the several extraction methods. Therefore, the objective of this study was to investigate whether the different Arabic coffee genotypes prepared by various extraction methods would influence amateur consumers’ perception of sensory and hedonic judgments of specialty coffee. A large-sample experiment (n = 270) was conducted in a coffee shop at the Universidade Federal de Lavras and participants were divided into three groups according to the evaluated genotypes (Bourbon Amarelo, Pacamara and Híbrido de Timor), who tasted four samples, varying to the extraction methods (‘Conventional Brewed’, Hario V60, French Press and Espresso). From the results obtained, it is possible to conclude that there is a change in the sensory perception of aromas and flavors of coffees in all genotypes studied in the four extraction methods, as well as in the acceptance and purchase intention by consumers.Item Coverage plants in coffee production systems as weed control(Universidade Federal de Lavras, 2024-05-02) Barros, Vanessa Maria de Souza; Thimothee, Jean Alex; Rodrigues, Rafael Jorge Almeida; Gonçalves, Adenilson Henrique; Medeiros, Fernanda Carvalho Lopes de; Ferreira, André Dominghetti; Carvalho, Gladyston RodriguesThe aim of this study was to evaluate the floristic and phytosociological compositions of weeds and the influence of cover crops between rows of organic and conventional coffee plantations. The assessment of weeds was carried out in two seasons (dry and rainy) in 2019 and 2020. A square made from welded iron bars of 0.50 x 0.50 m (0.25 m2) was launched four times in each block randomly, avoiding overlap, totaling 4.0 m2 of sampled area. A total of 41 weed species were found and described, which were distributed in 38 genera and 19 families with the predominance of Poaceae and Asteraceae. The most abundant species were Cyperus sp. and Urochloa decumbens Staf. that occurred simultaneously in all treatments and showed greater importance (IVI) among weeds. The similarity index is generally low, indicating that the weed community was affected by the presence and absence of cover crops.