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Id: biblio-1285566
Autor: Pozza Junior, Mario Cezar; Pandini, Jéssica Angela; Hein, Daiane Paulina Reichert; Silveira, José Aldemir da; Stangarlin, José Renato; Portz, Roberto Luis; Bonett, Lucimar Pereira.
Título: Phaseolin Induction on Common-Bean Cultivars and Biological Control of Colletotrichum lindemuthianum 89 Race by Baccharis trimera (Less) Dc
Fonte: Braz. arch. biol. technol;64(spe):e21200816, 2021. tab, graf.
Idioma: en.
Resumo: Abstract The objective of this work was to evaluate the fungitoxic effect of the aqueous extracts of Baccharis trimera on the mycelial growth of Colletotrichum lindemuthianum 89 race, as well as its effect on the accumulation of phaseolin in hypocotyls of different cultivars and common bean varieties. It was obtained 20% aqueous extract from plants collected in municipalities of the Western Region of Paraná. Blocks containing C. lindemuthianum mycelium were transferred to Petri dishes containing medium with the different extracts and incubated at 25 °C. The colonies diameter was measured until the 12th day. Effects of aqueous extracts on phaseolin production was evaluated in hypocotyls of Carioca, Cnpf 8104, Soberana, Tibatã, Uirapurú cultivars, as well as Rosinha and Vermelho varieties. Each one cultivar and variety hypocotyl was transferred separately to test tubes containing 500 μL of 20% aqueous extracts. Sterile water, Bion®, and UV was used as controls. The phaseolin production was measured in spectrophotometer [280 nm]. Results of the evaluation of the antifungal activity of aqueous extracts of Baccharis sp. specimens collected indicate that approximately 50% of the samples presented capacity to reduce between 74 and 92% of C. lindemuthianum growth. Cultivar Tibatã and Vermelho variety showed greater sensitivity over the applied treatments. Results of fungal filtrates and vegetal aqueous extracts presented a low capacity to induce the production of phaseolin in hypocotyls.
Descritores: Controle Biológico de Vetores
Colletotrichum/crescimento & desenvolvimento
Phaseolus
Baccharis/microbiologia
-Brasil
Responsável: BR1.1 - BIREME


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Id: biblio-1095831
Autor: Toledo-Perdomo, Claudia E.
Título: Enemigos naturales nativos de mosca blanca (Hemiptera: Aleyrodidae) en el cultivo de ejote francés en Chimaltenango, Guatemala / tive natural enemies of whitefly (Hemiptera: Aleyrodidae) in French bean crop in Chimaltenango, Guatemala
Fonte: Cienc. tecnol. salud;6(2):98-106, jul dic 2019. ilus.
Idioma: es.
Resumo: El complejo de mosca blanca (Hemiptera: Aleyrodidae) incluye algunas de las principales plagas del ejote francés (Phaseolus vulgaris L.). Dentro de las cuales, Bemisia tabaci es vector del virus del mosaico dorado que afecta la calidad y rendimiento del cultivo, con pérdidas hasta del 100% y un control difícil debido a la resistencia adquirida por las plagas hacia algunos agroquímicos. El ejote francés ocupa el segundo lugar entre de los productos no tradicionales de exportación de Guatemala. Su manejo agronómico ha sido principalmente a través del control químico, el cual afecta insectos y otros organismos que no son el objetivo del control, tales como: polinizadores, insectos benéficos, humanos y fauna silvestre. Los objetivos del estudio fueron: determinar la presencia de enemigos naturales nativos de la mosca blanca e identificar las especies de mosca blanca presentes en el cultivo del ejote francés en Chimaltenango. Para el estudio se establecieron cuatro parcelas de 300 m², se realizaron muestreos semanales durante dos ciclos del cultivo. En cada parcela se muestrearon cinco sitios y en cada sitio cinco plantas. Las especies de parasitoides nativos encontrados fueron: Encarsia Formosa Gahan, Eretmocerus eremicus Rose y Zolnerowuch y Amitus fuscipennis MacGown y Nebeker, la especie más abundante fue A. fuscipennis. Los depredadores identificados fueron Chrysoperla carnea (Stephens) e Hippodamia convergens Guerin-Meneville. La especie más abundante fue H. convergens. Estas especies podrían ser herramientas valiosas para ser empleadas en programas de control biológico, producciones orgánicas o en programas de manejo integrado de plagas.

The whitefly complex (Hemiptera: Aleyrodidae) includes some of the main pests of the French green bean (Phaseolus vulgaris L.). Among which, Bemisia tabaci is a vector of the golden mosaic virus that affects the quality and yield of the crop, with losses up to 100% and difficult control due to the resistance acquired by pests towards some agrochemicals. The French green bean ranks second among the non-traditional export products of Guatemala. Its agronomic management has been mainly through chemical control, which affects insects and other organisms that are not the objective of the control, such as: pollinators, beneficial insects, humans and wildlife. The objectives of the study were: to determine the presence of natural enemies native to the whitefly and identify the species of whitefly present in the cultivation of the French bean in Chimaltenango. For the study, four 300 m² plots were established, weekly sampling was carried out during two crop cycles. Five sites were sampled on each plot and five plants on each site. The native parasitoid species found were: Encarsia Formosa Gahan, Eretmocerus eremicus Rose and Zolnerowuch and Amitus fuscipennis MacGown and Nebeker, the most abundant species was A. fuscipennis. The predators identified were Chrysoperla carnea (Stephens) and Hippodamia convergens Guerin-Meneville. The most abundant species was H. convergens. These species could be valuable tools to be used in biological control programs, organic productions or in integrated pest management programs.
Descritores: Phaseolus/parasitologia
Hemípteros/crescimento & desenvolvimento
-Controle Biológico de Vetores/métodos
Phaseolus/crescimento & desenvolvimento
Dípteros
Hemípteros/parasitologia
Vírus do Mosaico
Limites: Animais
Responsável: GT49.1


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Id: biblio-882973
Autor: López-Monzón, Carlos E; Tobar-Tomás, Willmar V; Ventura-Gómez, Alan G.
Título: Controles alternativos para el gorgojo del frijol Acanthoscelides obtectus (Say) (Coleoptera: Bruchidae) / Alternate controls for the bean weevil Acanthoscelides obtectus (Say) (Coleoptera: Bruchidae)
Fonte: Cienc. tecnol. salud;3(2):149-156, jul.-dic. 2016.
Idioma: es.
Resumo: Las especies del género Quercus son de importancia ecológica y económica dentro de los bosques donde se desarrollan. Pueden encontrarse desde zonas cálidas y secas hasta selvas lluviosas. Estos bosques, también son reconocidos por presentar alto grado de endemismo y gran número de interacciones ecológicas. Sin embargo, en Guatemala las especies de encino han sido poco estudiadas y están fuertemente amenazadas; a pesar de poseer un alto potencial para aprovechamiento, manejo y uso en la restauración de ecosistemas. Este estudio se orientó hacia la actualización de la riqueza y distribución geográfica de las especies de encino para Alta Verapaz, Baja Verapaz y Petén, a partir de la revisión de registros en herbarios nacionales, bases de datos en línea de herbarios extranjeros y colectas de campo. Se registraron 19 especies de encinos en Alta Verapaz, Baja Verapaz y Petén, nueve especies más de las reportadas previamente, actualizándose los rangos de distribución departamental de 18 especies a excepción de Quercus sapotifolia Liebm. De las especies registradas, 16 se encuentran con algún grado de amenaza, según el Listado de Especies Amenazadas y listas rojas de UICN. También se identificaron vacíos de información acerca de la distribución de estas especies dentro de remanentes boscosos importantes en los departamentos evaluados. Se espera que a partir de este estudio se incrementen los esfuerzos por comprenden la riqueza y distribución de las especies de encino para Guatemala.

Quercus species represent one of the genera with ecological and economic importance within the forests where they develop, since these can be found from warm and dry zones to rain forests. Oak forests also exhibit high endemism levels and a large number of ecological interactions. However, oak species in Guatemala have been briefly studied, although they represent a genus highly threatened and with a high potential for use, handling and ecosystem restoration. This study was oriented towards the actualization of richness and geographical distribution of the oak species in Alta Verapaz, Baja Verapaz and Peten from reviewing records in National Herbariums, online databases of foreign Herbariums and field collection. A total of 19 oak species in Alta Verapaz, Baja Verapaz and Peten were recorded, nine more species of those previously reported, updating the departmental distribution ranges of 18 species except Quercus sapotifolia Liebm. Of the species recorded, 16 were listed with some degree of threat according to the national List of Threatened Species and the IUCN Red List of Threatened Species. Our results evidenced that the oak species were located in important forest remnants in all of the departments evaluated. It is expected from this study to increase the efforts to understand the oak species richness and species distributions patterns for Guatemala.
Descritores: Controle de Pragas
Phaseolus/crescimento & desenvolvimento
-Pragas da Agricultura
Piper nigrum
Limites: Humanos
Animais
Masculino
Feminino
Responsável: GT49.1


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Id: lil-696590 LILACS-Express
Autor: ESCOBAR ESCOBAR, NATALIA; MORA DELGADO, JAIRO; ROMERO JOLA, NÉSTOR.
Título: RESPUESTA AGRONÓMICA DE Zea mays L. y Phaseolus vulgaris L. A LA FERTILIZACIÓN CON COMPOST / AGRONOMIC RESPONSE OF Zea mays L. and Phaseolus vulgaris L. TO COMPOST FERTILIZATION
Fonte: Rev. luna azul;(37):18-29, jul.-dic. 2013. ilus, tab.
Idioma: es.
Resumo: El compostaje es una tecnología ecológica, la cual constituye una vía para la reutilización y biotransformación de materiales orgánicos así como su posterior aplicación en suelos. La calidad de un abono orgánico se determina a partir del contenido nutricional y de la capacidad de proveer nutrientes a un cultivo. Con base en un compostaje de material orgánico en mezcla (pulpa de café, residuos de banano, gallinaza y bovinaza), proveniente de fincas cafeteras ubicadas en el departamento de Cundinamarca, se determinaron y compararon indicadores químicos y biológicos. Además, mediante un bioensayo, usando dos especies con alto potencial alimentario y forrajero: maíz (Zea mays L.) y fríjol (Phaseolus vulgaris L.), se evaluó el efecto del compost sobre parámetros agronómicos y productividad en ambos cultivos. Siete tratamientos fueron evaluados [Abono químico (Q), Mezcla 1 (Mz1), Mezcla 2 (Mz2), Mezcla 3 (Mz3), Testigo sin fertilización (SF), Abono orgánico comercial (AOC)], con base en la determinación de parámetros químicos (MO, macro y micronutrientes). En el bioensayo con maíz (Zea mays L.), Q y Mz1 obtuvieron los parámetros más altos durante la etapa vegetativa; en la etapa de floración la Mz3 obtuvo los mejores valores en los parámetros. En fríjol (Phaseolus vulgaris L.), en la etapa vegetativa, los tratamientos Q y Mz1 fueron los mejores sin presentar diferencias significativas entre sí; en las etapas de floración y rendimiento Mz2 fue la que obtuvo mejor respuesta. En conclusión, los abonos orgánicos son una alternativa viable y sostenible probada bajo condiciones de campo.

Composting is an ecological technology which constitutes a way to reusing and biotransforming organic materials as well as their subsequent application in soil. The quality of organic fertilizer is determined from the nutritional content and the ability to provide nutrients to a crop. Based on an organic material composting mix, (coffee pulp, banana waste, chicken and cattle manure) coming from the coffee farms located in the department of Cundinamarca, chemical and biological indicators were determined and compared. In addition, through a bioassay, using two species with high food and feed potential, corn (Zea mays L.) and bean (Phaseolus vulgaris L.), the effect of compost on agronomic parameters and productivity in both crops was assessed. Seven treatments were evaluated [chemical fertilizer (Q), mixture 1 (Mz1), mixture 2 (Mz2), mixture 3 (Mz3), control without fertilizer (SF), commercial organic fertilizer (AOC)], based on the determination of chemical parameters (MO, CO, macro and micronutrients). In the bioassay with corn (Zea mays L.), Q and Mz1 obtained the highest parameters during the vegetative stage; in the flowering stage, Mz3 obtained the best values in the parameters. In beans (Phaseolus vulgaris L.) in the vegeteative stage treatments, Q and Mz1 were the best, without showing statistical differences among them. In the flowering and harvesting phase, Mz2 obtained a better response. In conclusion, organic fertilizers are a viable and sustainable alternative tested under field conditions.
Descritores: Compostagem
-Phaseolus
Eficiência
Fabaceae
Limites: Humanos
Tipo de Publ: Artigo Clássico
Responsável: CO54.1 - Centro de Biblioteca e Información Científica


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Id: biblio-1142505
Autor: Gabre, Venicios Vieira; Venancio, Wilson Story; Moraes, Breno Augusto; Furmam, Fernanda de Goes; Galvão, Carolina Weigert; Gonçalves, Daniel Ruiz Potma; Etto, Rafael Mazer.
Título: Multiple Effect of Different Plant Growth Promoting Microorganisms on Beans (Phaseolus vulgaris L. ) Crop
Fonte: Braz. arch. biol. technol;63(spe):e20190493, 2020. tab, graf.
Idioma: en.
Resumo: Abstract We evaluated the effect of combined Rhizobium tropici, Trichoderma asperellum and plant growth-promoting rhizobacteria (PGPR) in beans crop. The hypothesis that strains of T. asperullum, R. tropici and PGPR combined could improve growth, biomass accumulation and beans yield was tested under greenhouse and field conditions. The treatments consisted of control, mineral nitrogen application and inoculation, isolated and associated with the following microorganisms: Rhizobium tropici, Bacillus subtilis, Trichoderma asperellum and Burkholderia sp. 10N6. Results were evaluated by shoot dry weight (SDW) and root dry weight (RDW), number of nodules and yield components. In greenhouse environment all the microorganisms behaved similarly, and the treatments inoculated with Burkholderia sp. 10N6 (IBu) and R. tropici (IR) stood out regarding the production components. In field conditions the treatments IR and IRTBa presented the highest values of SDW and RDW. Our results suggest that inoculation with R. tropici, T. asperellum and PGPR may promote beans growth and bring benefits to shoot and root accumulation, increase the number of nodules as well as improve yield components, contributing to a sustainable agriculture.
Descritores: Phaseolus/crescimento & desenvolvimento
Phaseolus/microbiologia
-Bacillus subtilis
Trichoderma
Burkholderia
Rhizobium tropici
Desenvolvimento Vegetal
Responsável: BR1.1 - BIREME


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Id: biblio-1147964
Autor: Oliveira, Glauce Portela de; Lobo, Francisco de Almeida; Ortíz, Carmen Eugenia Rodríguez.
Título: Genetic and morphological characterization of traditional rice and bean varieties from the Pantanal of Mato Grosso, Brazil / Caracterização genética e morfológica de arroz e feijão do Pantanal mato-grossense, Brasil
Fonte: Biosci. j. (Online);36(6):1975-1983, 01-11-2020. ilus, tab.
Idioma: en.
Resumo: Farmers from the district of São Pedro de Joselândia, belonging to the municipality of Barão de Melgaço, Pantanal of Mato Grosso, have been cultivating for some time two rice plant materials and three types of beans that, according to them, are not commercial. For this reason, the objective of this work was to test the originality of the materials by means of genetic and morphological characterization in order to identify whether the nature of the subsamples would be effectively traditional or whether they are varieties already known in the market. Morphological analyzes of the cultivated plants (phenotypic characteristics, cycle and flowering) and seed of the rice subsamples, hereinafter called Agulhinha Vermelho and Branquinho and of the Amarelinho, Rosinha and Roxinho subsamples were performed. Also, the evaluation of distribution of comparative genetic variability with other materials of the same species, already cataloged, was determined. The subsamples were characterized as traditional varieties different from those already cataloged and they are not found in the Nuclear Collection of Rice and Beans of the Brazilian Agricultural Research Corporation (Embrapa). They have distinct morphological characteristics, being potential species for use in the market of new technologies. This should guarantee to the residents of that community that they are breeders of specific materials of cultural heritage adapted to the local conditions.

Agricultores do distrito de São Pedro de Joselândia, pertencente ao município de Barão de Melgaço ­ Pantanal Norte do estado de Mato Grosso, vêm cultivando há tempos dois materiais vegetais de arroz e três materiais de feijão que, segundo os mesmos, não são comerciais. Por essa razão, com este trabalho o objetivo foi realizar a caracterização genética e morfológica desses materiais a fim de identificar se a natureza das subamostras seria efetivamente tradicional, ou se trataria de variedades conhecidas no mercado e descrever suas características. Foram realizadas análises morfológicas das plantas cultivadas (características fenotípicas, ciclo e florescimento) e de sementes das subamostras de arroz, doravante denominadas Agulhinha vermelho e Branquinho e das subamostras de feijão Amarelinho, Rosinha e Roxinho. Ainda, determinou-se a avaliação de distribuição de variabilidade genética comparativa com demais materiais das mesmas espécies, já catalogados. Observou-se que as subamostras foram caracterizadas como variedades tradicionais, diferentes daquelas já catalogadas e que não se encontram na Coleção Nuclear de Arroz e Feijão da Embrapa. As mesmas possuem características morfológicas distintas, podendo ser materiais com potencial para o uso no mercado de novas tecnologias, o que deve garantir aos moradores da comunidade, serem obtentores de materiais específicos e adaptado às condições locais.
Descritores: Oryza
Phaseolus
Patrimônio Genético
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1147955
Autor: Paixão, Aline Almeida da; Corrêa, Paulo Cesar; Baptestini, Fernanda Machado; Zeymer, Juliana Soares; Bustos-Vanegas, Jaime Daniel.
Título: Physical properties of beans of the BRSMG majestoso cultivar during drying / Propriedades físicas de grãos de feijão cultivar BRSMG majestoso durante a secagem
Fonte: Biosci. j. (Online);36(6):1911-1918, 01-11-2020. ilus, graf, tab.
Idioma: en.
Resumo: Beans are the main source of protein of plant origin in the Brazilian diet, they also contain phenolic compounds, antioxidants, iron, fibers and vitamins. The BRSMG Majestoso cultivar belongs to the commercial group of carioca beans, displays high productivity, excellent health and a 90-day cycle, has high yield and is resistant to disease. The study of physical properties enables the prediction of agricultural products behavior relative to responses of physical and chemical treatments, in order to allow the maintenance of quality and safety of processed foods. The aim of the present study was to evaluate the effect of drying on the physical characteristics of beans of the BRSMG Majestoso cultivar. Beans with an initial moisture content of approximately 0.2660 d.b. (dry basis) were used, and dried at 40ºC. The following physical characteristics were determined: bulk density, unit density, intergranular porosity, 1000-grain weight, sphericity, circularity, geometric diameter, unit volume, projected area, surface area and the surface to volume ratio. Based on the results, a reduction in the moisture content of the beans promotes an increase in bulk density, unit density, porosity, sphericity, circularity and the surface to volume ratio. Conversely, the 1000-grain weight, geometric diameter, unit volume, projected area and surface area decreased as the moisture content of the beans was reduced.

Objetivou-se com o presente trabalho, avaliar o efeito da secagem sobre as características físicas de grãos de feijão cultivar BRSMG Majestoso. Foram utilizados grãos com teor de água inicial de aproximadamente 0,2660 b.s. (base seca), e submetidos à secagem com temperatura de 40 ºC. Foram determinadas as propriedades físicas: massa específica aparente, massa específica unitária, porosidade intergranular, massa de mil grãos, esfericidade, circularidade, diâmetro geométrico, volume unitário, área projetada, área superficial e a relação superfície/volume. Com base nos resultados obtidos conclui-se que a redução do teor de água dos grãos de feijão proporcionou aumento da massa específica aparente e unitária, porosidade, esfericidade, circularidade e relação superfície/volume. Em contrapartida, a massa de mil grãos, o diâmetro geométrico, o volume unitário, a área projetada e a área superficial diminuíram com a redução do teor de água dos grãos de feijão.
Descritores: Phaseolus
Conservação de Alimentos
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1147954
Autor: Kaneko, Flávio Hiroshi; Sabundjian, Michelle Traete; Ferreira, João Paulo; Gitti, Douglas de Castilho; Nascimento, Vagner do; Carmo, Andreza Lopes do; Branco van Cleef, Eric Haydt Castello; Buzetti, Salatiér; Arf, Orivaldo.
Título: Sources and management of nitrogen before or after irrigation on the winter wheat and bean production / Fontes de nitrogênio e manejo antes ou após a irrigação nas culturas do trigo e feijoeiro "de inverno"
Fonte: Biosci. j. (Online);36(6):1900-1910, 01-11-2020. graf, tab.
Idioma: en.
Resumo: Studies that demonstrate the effects of sources of nitrogen (N) applied before or after irrigation on the yield of winter crops are limited in literature. In this sense, the objective of this study was to compare the effect of sources of N applied immediately before or after 13 mm irrigation of wheat and bean winter crops. It was used a randomized complete block design, with 4 replicates, in a 5 × 2 + 1 factorial scheme, and 11 treatments consisted of five N sources: urea, polymer-coated urea, urea + ammonium sulfate, ammonium sulfate, and ammonium nitrate and a control treatment (without N fertilization). For wheat, although ammonium nitrate provided great N content in the leaves, the grain yield was lower due to the lodging of the plants; since the application of N either before or after irrigation did not influence the grain yield. Regarding the bean, N fertilization increased productivity, but there were no differences among N sources and, despite the greater N content in the leaves observed with the N supply before irrigation the greatest grain yield was observed when N was applied after the irrigation.

Estudos que demonstram os efeitos de fontes de nitrogênio (N) aplicadas antes ou após a irrigação na produtividade das culturas de inverno são limitados na literatura. Neste sentido, o objetivo deste trabalho foi comparar o efeito de fontes de N aplicadas imediatamente antes ou após a irrigação de 13 mm nas culturas do trigo e feijão de inverno. Utilizou-se o delineamento de blocos casualizados, com 4 repetições, em esquema fatorial incompleto 5 × 2 + 1, sendo 11 tratamentos com cinco fontes de N: ureia, ureia revestida com polímero, ureia + sulfato de amônio, sulfato de amônio e nitrato de amônio e um tratamento controle (sem adubação nitrogenada). Para o trigo, embora o nitrato de amônio tenha proporcionado maior teor de N nas folhas, a produtividade de grãos foi menor devido ao acamamento das plantas; já a aplicação de N antes ou após a irrigação não influenciou a produtividade de grãos. Com relação ao feijão, a adubação nitrogenada aumentou a produtividade, mas não houve diferenças entre as fontes de N e, apesar do maior teor de N nas folhas observadas com o suprimento de N antes da irrigação, a maior produtividade de grãos foi observada com a adubação após a irrigação.
Descritores: Polímeros
Triticum
Phaseolus
Nitrogênio
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1147825
Autor: Pacheco, Jéssica Schroder; Resende, Cecília Leão Pereira; Mendes, Rafael Correia; Pereira, Helton Santos; Rodrigues, Fabricio.
Título: Agronomic efficiency for nitrogen, phosphorus, and potassium in bean cultivars / Eficiência agronômica para nitrogênio, fósforo e potássio em cultivares de feijão
Fonte: Biosci. j. (Online);36(5):1590-1599, 01-09-2020. tab, ilus.
Idioma: en.
Resumo: The aim of this study was to identify and categorize new bean cultivars regarding their efficiency and responsiveness to nitrogen, phosphorus, and potassium, both individually and simultaneously, as well as to stipulate the cultivars that would suit each niche market based on this classification. Three experiments were conducted in the field separated by nutrients adopting the randomized block design in a factorial scheme (11 x 4) of 11 cultivars in four doses with three replications. Grain yield was the variable investigated and the means were the basis for the classification separated by in four availabilities: low, partial, adequate dose, and nutritional excess. Genetic variability was observed among the bean cultivars for efficiency and responsiveness (agronomic efficiency) to nitrogen, phosphorus, and potassium. The following cultivars: BRS Agreste, BRS Estilo, BRS Notável, and Pérola revealed the greatest values of efficiency and responsive ratings for nitrogen, phosphorus, and potassium, with indications for low and high technological levels. On the contrary, the cultivars BRS Ametista and BRS Sublime based on the efficiency and non-responsive classification showed a low ability to acquire or utilize the nutrients for grain formation. The BRS Pontal cultivar for all three nutrients displayed a high degree of efficiency with a value exceeding the average under different conditions of stress, suggesting that a more rustic cultivar best suits the market niche of small farmers.

O objetivo do trabalho foi identificar e classificar novas cultivares de feijoeiro quanto a eficiência e responsividade ao nitrogênio, fósforo e potássio, de forma individual e simultânea, além de indicar as cultivares para cada nicho de mercado, de acordo com essa classificação. Foram realizados três experimentos em campo, separados por nutriente, com delineamento de blocos casualizados, em esquema fatorial (11 x 4), sendo 11 cultivares em quatro doses, com três repetições. A variável analisada foi a produtividade de grãos e as médias utilizadas para a classificação, separando-se por nutriente, em quatro disponibilidades, sendo baixo, parcial, dose adequada e excesso nutricional. Existe variabilidade genética para eficiência e responsividade (eficiência agronômica) entre os cultivares de feijão, para nitrogênio, fósforo e potássio. As cultivares BRS Agreste, BRS Estilo, BRS Notável e a Pérola são as que possuem maior número de classificações eficientes e responsivas para nitrogênio, fósforo e potássio, sendo indicadas para baixo e alto nível tecnológico. Em sentido oposto, as cultivares BRS Ametista e a BRS Sublime com classificação ineficiente e não-responsiva, com baixa capacidade de adquirir ou utilizar os nutrientes para a formação de grãos. A cultivar BRS Pontal para nitrogênio, fósforo e potássio, apresenta uma eficiência alta ou acima da média sob os diferentes estresses, o que indica que é uma cultivar mais rústica e que atende o nicho de mercado de pequenos produtores.
Descritores: Fósforo
Potássio
Phaseolus
Nitrogênio
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1003280
Autor: Pérez-Peralta, Paulina Janneth; Ferrera-Cerratoa, Ronald; Alarcón, Alejandro; Trejo-Téllez, Libia I; Cruz-Ortega, Rocío; Silva-Rojas, Hilda V.
Título: Respuesta del simbiosistema frijol (Phaseolus vulgaris L.) y Rhizobium tropici CIAT899 ante el efecto alelopático de Ipomoea purpurea L. Roth / Responses of the common bean (Phaseolus vulgaris L.) and Rhizobium tropici CIAT899 symbiosystem to induced allelopathy by Ipomoea purpurea L. Roth
Fonte: Rev. argent. microbiol;51(1):47-55, mar. 2019. graf, tab.
Idioma: es.
Resumo: La alelopatía es un fenómeno que involucra la producción de metabolitos secundarios que influyen en el crecimiento de las plantas, pero este potencial alelopático ha sido poco estudiado en la simbiosis rizobio-leguminosa. Esta investigación tuvo los siguientes objetivos: 1) evaluar el potencial alelopático de lixiviados acuosos de Ipomoea purpurea L. Roth en la germinación de semillas y en el crecimiento radical de plántulas de frijol (Phaseolus vulgaris L.); 2) determinar el efecto de estos lixiviados en el crecimiento in vitro de Rhizobium tropici CIAT899, y 3) evaluar el potencial alelopático de I. purpurea en el crecimiento, la fisiología y la nodulación de frijol en simbiosis con R. tropici. Tanto el lixiviado acuoso de raíz como el de la parte aérea de I. purpurea estimularon la germinación de semillas de frijol y la elongación radical. El crecimiento in vitro de R. tropici fue inhibido al aplicar los 2 tipos de lixiviado. La presencia de I. purpurea tuvo un efecto negativo en el crecimiento y en las respuestas fisiológicas de las plantas de frijol, que fue atenuado cuando las plantas fueron inoculadas con Rhizobium tropici; no obstante, la nodulación asociada a esta bacteria fue afectada en presencia de la planta alelopática. Los resultados indican que la simbiosis de rizobios en las raíces de frijol es un elemento importante en la atenuación de los danos producidos por la planta alelopática I. purpurea.

Allelopathy is a phenomenon that involves the production of secondary metabolites that influence the growth of plants and microorganisms; however, this alellopathic effect has been scarcely studied on the rhizobia-legume symbiosis. The aims of this research were 1) to assess the allelopathic potential of aqueous extracts of Ipomoea purpurea L. Roth on seed germination and root length of common bean seedlings (Phaseolus vulgaris L.), 2) to determine its effects on the in vitro growth of Rhizobium tropici CIAT899, and 3) to evaluate the allelopathic potential of I. purpurea on the growth, nodulation and physiology of common bean plants inoculated with R. tropici. After 48 h, 15% of the aqueous root extract of I. purpurea stimulated seed germination, whereas 4% of the aqueous shoot extracts stimulated such germination. Both the root or shoot extracts stimulated seed germination and e root length. In vitro growth of R. tropici was inhibited as a result of the application of both aqueous extracts. The presence of I. purpurea negatively affected both the growth and physiological responses of common bean plants, and this effect was attenuated after the inoculation of R. tropici; nevertheless, this allelopathic plant affected root nodulation. Our results suggest that the symbiosis of rhizobia and roots of common bean plants is an important element for attenuating the negative effects caused by the allelopathic plant.
Descritores: Simbiose/fisiologia
Ipomoea purpurea/análise
Phaseolus/crescimento & desenvolvimento
Rhizobium tropici/crescimento & desenvolvimento
Alelopatia/fisiologia
-Técnicas In Vitro/métodos
Fabaceae/fisiologia
Tipo de Publ: Estudo de Avaliação
Estudo Observacional
Responsável: AR635.1 - FCVyS - Servicio de Información y Documentación



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