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Registros recuperados: 18
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Amostragem do banco de semente e flora emergente de plantas daninhas PAB
Voll,Elemar; Adegas,Fernado Storniolo; Gazziero,Dionísio Luís Pisa; Brighenti,Alexandre Magno; Oliveira,Maria Cristina Neves de.
O objetivo desta pesquisa foi determinar o número de amostras necessárias para estimar com precisão aceitável a quantidade de sementes no solo e a flora de plantas daninhas emergentes, em áreas experimentais e de lavoura, para auxiliar na tomada de decisão das estratégias de manejo das plantas daninhas. A amostragem do solo para quantificação do banco de sementes foi feita com trado tubular de 5,0 cm de diâmetro, na profundidade de 0 a 10 cm. A flora emergente foi contada por meio de um gabarito de ferro nas dimensões de 0,5x0,5 m, de forma aleatória na área. O número de amostras necessário foi estimado em razão da média de sementes da amostra, para uma determinada precisão (CV = 20% ou 40%). Foi estimado que, nas áreas experimentais, para médias de 10 a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Banco de sementes do solo; Controle de planta daninha; Amostra de solo; Método.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000200007
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Biology and nutrition of Spodoptera frugiperda (Lepidoptera: Noctuidae) fed on different food sources Scientia Agricola
Silva,Débora Mello da; Bueno,Adeney de Freitas; Andrade,Karine; Stecca,Cristiane dos Santos; Neves,Pedro Manuel Oliveira Janeiro; Oliveira,Maria Cristina Neves de.
ABSTRACT: We studied Spodoptera frugiperda development using different food sources in the laboratory and field. Newly hatched larvae were fed soybean, cotton, maize, wheat, and oat leaves. An artificial diet was used as the control. Duration of pre-pupal, pupal, and larva-adult period, pupal weight, sex ratio, survival, larva feeding preferences, oviposition preferences, and nutritional quality of different hosts were evaluated. Insects fed on wheat showed the shortest larva-adult period. The insects fed on cotton and soybean had longer larval development cycles and pupae of lower weight. Feeding preference was evident for third instar larvae and did not differ between wheat, oat, maize, and soybean, which were the preferred hosts. Moths oviposited to a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural entomology; Feeding behavior; Insect-plant interactions.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000100018
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Changes in the isoflavone profile and in the chemical composition of tempeh during processing and refrigeration PAB
Ferreira,Márcia Pires; Oliveira,Maria Cristina Neves de; Mandarino,José Marcos Gontijo; Silva,Josemeyre Bonifácio da; Ida,Elza Iouko; Carrão-Panizzi,Mercedes Concórdia.
The objective of this work was to analyze changes in the isoflavone profile, determined by high performance liquid chromatography, at different processing stages and after refrigeration of tempeh. For tempeh production, clean soybean grains from cultivars BR 36 (low isoflavone content) and IAS 5 (high) were dehulled, and the separated cotyledons were hydrated and then cooked in boiling water for 30 min. Spores of the fungus Rhizopus microsporus var. oligosporus were inoculated in the cooked and cooled cotyledons, and incubated at 32ºC for 6, 12, 18, and 24 hours in perforated polypropylene bags, for fermentation. The resulting tempeh was stored at 4ºC for 6, 12, 18, and 24 hours. After 24-hour fermentation, isoflavone glucosides were 50% reduced, and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rhizopus microsporus var. oligosporus; Aglycone; Fermentation; Functional food; High performance liquid chromatography; Malonyl.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011001100018
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Clones de copa de seringueira resistentes ao mal-das-folhas para o cultivo na Amazônia tropical úmida Bragantia
Moraes,Larissa Alexandra Cardoso; Moraes,Vicente Haroldo de Figueiredo; Moreira,Adônis; Cordeiro,Everton Rabelo; Oliveira,Maria Cristina Neves de.
O objetivo deste trabalho foi avaliar o desempenho de 11 clones de copa de seringueira de Hevea pauciflora × H. guianensis, H. guianensis × H. pauciflora, H. pauciflora × H. rigidifolia e H. pauciflora resistentes ao fungo Microcyclus ulei, causador do mal-das-folhas, sobre o painel de CNS AM 7905 (seleção primária de H. brasiliensis), durante 14 anos nas condições edafoclimáticas da Amazônia tropical úmida. Foram avaliados: produtividade de borracha seca durante sete anos, aspectos anatômicos, características fisiológicas do látex, estado nutricional das plantas e métodos de sangria (oriental e amazônica). Os clones de copa CPAA C 01, 06 e 45 produziram, na média, mais de 1,4 t ha- 1 ano- 1 de borracha seca, seguido pelos clones CPAA C 13, 14, 15, 16 e...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hevea spp.; Microcyclus ulei; Produção; Estado nutricional; Aspectos anatômicos; Características fisiológicas do látex.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052013000300010
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Controle de Helicoverpa armigera (Lepidoptera: Noctuidae) em soja com inseticidas químicos e biológicos PAB
Kuss,Cassiano Carlos; Roggia,Rejane Cristina Roppa Kuss; Basso,Claudir José; Oliveira,Maria Cristina Neves de; Pias,Osmar Henrique de Castro; Roggia,Samuel.
Resumo: O objetivo deste trabalho foi avaliar o desempenho de inseticidas autorizados emergencialmente para o controle de Helicoverpa armigera (Lepidoptera: Noctuidae) em soja. Sete inseticidas foram pulverizados em campo e, após 24 horas, folhas do ponteiro foram coletadas e oferecidas para lagartas de 2o instar em laboratório. Lagartas do 4o instar receberam a última folha trifoliolada que se encontrava completamente expandida no momento da pulverização. Outro grupo foi exposto a folhas coletadas a partir de 72 horas da pulverização. Em campo, seis inseticidas foram pulverizados e, em seguida, as plantas foram infestadas com lagartas de 2o e 3o instar. No primeiro estudo, flubendiamida, clorantraniliprole, clorfenapir, indoxacarbe e metoxifenozida...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Ameaça fitossanitária; Heliothinae; Manejo integrado de pragas; Praga invasora; Tempo letal..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000500527
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Detrimental effect of rutin on Anticarsia gemmatalis PAB
Hoffmann-Campo,Clara Beatriz; Ramos Neto,José Augusto; Oliveira,Maria Cristina Neves de; Oliveira,Lenita Jacob.
Behavioral and nutritional effect of rutin (quercetin 3-O-rutinosídeo) on Anticarsia gemmatalis Hübner (Lep.: Noctuidae), a major soybean defoliator in Brazil, was evaluated from the third instar to pupation. Rutin is one of the flavonol glycosides identified in the leaves of the wild soybean PI 227687. Larval weight and amount of ingested food decreased as rutin concentration in the diet increase. An interactive effect between feeding time and diet (treatment) was observed on insect growth; when larvae fed on pure-diet, feeding time elongation resulted in heavier pupae. Differently, the weight of larvae fed on rutin-diet remained almost stable, in spite of eating for longer. A. gemmatalis growth was negatively influenced by rutin-diet not only by feeding...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Feeding deterrence; Insect nutrition; Flavonol glycoside; Lepidoptera.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006001000001
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Development of Sclerotium rolfsii sclerotia on soybean, corn, and wheat straw, under different soil temperatures and moisture contents PAB
Pinheiro,Victor dos Reis; Seixas,Claudine Dinali Santos; Godoy,Cláudia Vieira; Soares,Rafael Moreira; Oliveira,Maria Cristina Neves de; Almeida,Álvaro Manuel Rodrigues.
The objective of this work was to evaluate the effect of moisture and temperature on the development of Sclerotium rolfsii on soybean, corn, and wheat straw. Wheat straw produced the lowest number of sclerotia. Intermediate soil moisture level (70% of field capacity), and temperatures ranging between 25-30ºC favored sclerotia development. No sclerotia were formed at temperatures between 30-35ºC, on any type of straw.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Glycine max; Crop rotation; No-tillage; Sclerotium blight.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000300014
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Efeito da germinação de soja CV. BR-13 e Paraná sobre ácido fítico, fósforo total e inibidores de tripsina PAB
Ribeiro,Mara Lucia Luiz; Ida,Elza Iouko; Oliveira,Maria Cristina Neves de.
Este trabalho foi conduzido para avaliar o efeito da germinação sobre os constituintes antinutricionais da soja, ácido fítico, P total e inibidores de tripsina, que interferem na utilização de proteínas e outras substâncias. A diminuição no aproveitamento de nutrientes resulta em inibição de crescimento, hipoglicemia ou danos a tecidos animais. Para os ensaios foram utilizadas as cultivares de soja (Glycine max (L.) Merrill ) BR-13 e Paraná. As sementes foram incubadas em câmara de germinação a 25°C e 100% de umidade, de 0 a 72 horas, com coleta de amostras em intervalos eqüidistantes de seis horas. A cultivar Paraná apresentou teores superiores de ácido fítico, P total e inibidores de tripsina, em relação à cultivar BR-13. As análises de variância e...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Constituintes antinutricionais.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000100005
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Environmental and genetic variation of isoflavone content of soybean seeds grown in Brazil PAB
Carrão-Panizzi,Mercedes Concórdia; Berhow,Mark; Mandarino,José Marcos Gontijo; Oliveira,Maria Cristina Neves de.
The objective of this work was to evaluate isoflavone concentrations in seeds of different Brazilian soybean cultivars grown in a range of locations and environmental conditions in Brazil. Seeds of 233 cultivars grown in Ponta Grossa, PR, Brazil, during the 2001/2002 soybean season, and of 22 cultivars sown in different locations of Brazilian Northeast, Southeast on South regions were analyzed for total isoflavones, including daidzin, glycitin, genistin and acetylgenistin. The total isoflavones ranged from 12 mg 100 g-1 (cv. Embrapa 48) to 461 mg 100 g-1 (cv. CS 305) among the 233 cultivars grown in Ponta Grossa, and the differences among them are due to genetic effects since all cultivars were grown and collected at the same locatation and year. This is...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Isoflavones; Sowing location; Soybean grains; Soybean cultivars; Soyfood.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001100011
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Grouping sunflower genotypes for yield, oil content, and reaction to Alternaria leaf spot using GGE biplot PAB
Leite,Regina Maria Villas Bôas de Campos; Oliveira,Maria Cristina Neves de.
Abstract:The objective of this work was to evaluate the suitability of the multivariate method of principal component analysis (PCA) using the GGE biplot software for grouping sunflower genotypes for their reaction to Alternaria leaf spot disease (Alternariaster helianthi), and for their yield and oil content. Sixty-nine genotypes were evaluated for disease severity in the field, at the R3 growth stage, in seven growing seasons, in Londrina, in the state of Paraná, Brazil, using a diagrammatic scale developed for this disease. Yield and oil content were also evaluated. Data were standardized using the software Statistica, and GGE biplot was used for PCA and graphical display of data. The first two principal components explained 77.9% of the total...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternariaster helianthi; Helianthus annuus; Disease resistance; Principal component analysis.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000800649
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Identification of reference genes for expression analysis by real-time quantitative PCR in drought-stressed soybean PAB
Stolf-Moreira,Renata; Lemos,Eliana Gertrudes de Macedo; Abdelnoor,Ricardo Vilela; Beneventi,Magda Aparecida; Rolla,Amanda Alves Paiva; Pereira,Selma dos Santos; Oliveira,Maria Cristina Neves de; Nepomuceno,Alexandre Lima; Marcelino-Guimarães,Francismar Corrêa.
The objective of this work was to validate, by quantitative PCR in real time (RT-qPCR), genes to be used as reference in studies of gene expression in soybean in drought-stressed trials. Four genes commonly used in soybean were evaluated: Gmβ-actin, GmGAPDH, GmLectin and GmRNAr18S. Total RNA was extracted from six samples: three from roots in a hydroponic system with different drought intensities (0, 25, 50, 75 and 100 minutes of water stress), and three from leaves of plants grown in sand with different soil moistures (15, 5 and 2.5% gravimetric humidity). The raw cycle threshold (Ct) data were analyzed, and the efficiency of each primer was calculated for an overall analysis of the Ct range among the different samples. The GeNorm application was used to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Expression stability; RT-qPCR; Water deficit.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000100008
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Isoflavone, anthocyanin, and fatty acid contents of vegetable-type soybean grains at different maturity stages PAB
Carrão-Panizzi,Mercedes Concórdia; Silva,Bruna dos Santos; Leite,Rodrigo Santos; Godoy,Ronoel Luiz de Oliveira; Santiago,Manuela Cristina Pessanha de Araujo; Felberg,Ilana; Oliveira,Maria Cristina Neves de.
Abstract: The objective of this work was to determine the oil, protein, fatty acid, isoflavone, and anthocyanin contents in soybean grains of different breeding lines and maturity stages. Evaluations were performed for the chemical profiles of black- (BRM09-50995) and of yellow-seed-coat (BRM11-51428 and BRM08-50643) breeding lines, harvested at the R6 (immature seeds), R7 (physiological maturity), and R8 (full maturity) maturity stages. Oil and protein contents increased from the R6 to the R8 stage, and BRM11-51428 showed the highest protein content. Palmitic, stearic, and linolenic fatty acids were higher at R6, and linoleic and oleic acids were higher at R7 and R8, respectively. At the R8 growth stage, BRM11-51428 and BRM 09-50995 showed the highest...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Aglucone; Breeding line; Glucoside; Oil; Protein.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103901
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Modelo de análise de regressão periódica da precipitação mensal, da bacia atlântico sudeste, no Estado do Paraná PAB
Queiroz,Emilson França de; Silva,Reinaldo Joaquim Bezerra da; Oliveira,Maria Cristina Neves de.
Este trabalho consistiu da realização da análise de regressão periódica dos totais mensais de precipitação de oito localidades do Estado do Paraná. Foram derivados modelos matemáticos que descrevem o transcurso desta variável, considerando um período de doze meses. A análise foi desenvolvida através da álgebra matricial e realizada a expansão em série de Fourier de uma função f(t), periódica e definida para o intervalo. Os dados originais foram ajustados para meses de 30 dias, transformados para normalizar a distribuição. Posteriormente foram determinados todos os componentes harmônicos das funções referentes a cada um dos oito locais. Após a verificação da normalidade dos componentes harmônicos, realizou-se a análise de variância, o que permitiu...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Métodos climatológicos; Modelos matemáticos; Dados meteorológicos.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000500002
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Morpho-anatomical and micromorphometrical evaluations in soybean genotypes during water stress BABT
Stolf,Renata; Medri,Moacyr Eurípedes; Pimenta,José Antônio; Boeger,Maria Regina Torres; Dias,Jaqueline; Lemos,Noélle Giacomini; Oliveira,Maria Cristina Neves de; Brogin,Rodrigo Luís; Yamanaka,Naoki; Neumaier,Norman; Farias,José Renato Bouça; Nepomuceno,Alexandre Lima.
In a greenhouse experiment, morpho-anatomical and micromorphometrical analyses of two soybean cultivars, MG/BR46 (Conquista) and BR16-tolerant and sensitive to drought, respectively-were used to study their water-deficit-tolerance strategies. Drought treatments were applied at reproductive stages from R2 to R7, where evaluations were conducted at 30 days and 45 days after stress started, respectively. The total length of Conquista plants (shoot + root) was greater than of BR16 plants. Pod dry weight was adversely affected due to the lack of moisture, decreasing productivity even of Conquista plants. Both the cultivars had normal development of root hairs; however, it was observed a decrease in the cortex:central cylinder ratio in BR16 stressed for 30 days,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anatomy; Leguminous; Drought; Root.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600002
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Mycelial compatibility and aggressiveness of Sclerotinia sclerotiorum isolates from Brazil and the United States PAB
Koga,Lucimara Junko; Bowen,Charles Roger; Godoy,Claudia Vieira; Oliveira,Maria Cristina Neves de; Hartman,Glen Lee.
The objective of this work was to evaluate the genetic diversity among Sclerotinia sclerotiorum isolates from Brazil and the USA, assess their aggressiveness variability, and verify the existence of an isolate-cultivar interaction. Isolate variability was determined by mycelial compatibility grouping (MCG), and isolate aggressiveness by cut-stem inoculations of soybean cultivars. Two experiments for MCGs and two for aggressiveness were conducted with two sets of isolates. The first set included nine isolates from the same soybean field in Brazil and nine from the Midwest region of the USA. The second set included 16 isolates from several regions of Brazil and one from the USA. In the first set, 18 isolates formed 12 different MCGs. In the second set, 81%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Sclerotinia stem rot; Disease resistance; Screening of cultivars; White mold.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000400265
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Phenotypic plasticity in a soybean cultivar with indeterminate growth type PAB
Balbinot Junior,Alvadi Antonio; Oliveira,Maria Cristina Neves de; Franchini,Julio Cezar; Debiasi,Henrique; Zucareli,Claudemir; Ferreira,André Sampaio; Werner,Flavia.
Abstract: The objective of this work was to evaluate how branch and stem variables contribute to grain yield in individual soybean (Glycine max) plants, cultivated at different planting densities, in a modern cultivar with indeterminate growth type. A field experiment was carried out during the 2013/2014 and 2014/2015 crop seasons, in a randomized complete block design with 12 replicates, using the cultivar NK7059 RR at four planting densities: 135, 235, 315, and 440 thousand plants per hectare. Grain yield per plant was evaluated and represented phenotypic plasticity, while the number of branches per plant, percentage of grain production in branches, and separate yield components from branches and stems were considered as the independent variables. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Plant density; Principal component analysis; Stepwise regression; Yield components.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000901038
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Physiological parameters in sugarcane cultivars submitted to water deficit Braz. J. Plant Physiol.
Graça,José Perez da; Rodrigues,Fabiana Aparecida; Farias,José Renato Bouças; Oliveira,Maria Cristina Neves de; Hoffmann-Campo,Clara Beatriz; Zingaretti,Sonia Marli.
To investigate the processes involved in the susceptibility of sugarcane plants to water deficit, several physiological parameters were evaluated in drought tolerant (SP83-2847 and CTC15) and sensitive (SP86-155) cultivars. The water deficit affected the photosynthetic apparatus of all the plants in different ways, within and among cultivars. The photosynthetic rate and stomatal conductance decreased significantly in all cultivars submitted to water deficit. In control plants of the tolerant cultivars (SP83-2847 and CTC15) the photosynthetic rate was higher than in the sensitive cultivar (SP86-155). Cultivar CTC15 showed the highest relative water content during the dry period. The quantum efficiency photosystem II of cultivar SP83-2847 was more stable in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Photosynthetic efficiency; Relative water content; Saccharum; Water stress; Drought.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000300006
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Quantitative differential expression of alpha and beta ryanodine receptor genes in PSE (Pale, Soft, Exudative) meat from two chicken lines: broiler and layer BABT
Oda,Sandra Helena Inoue; Nepomuceno,Alexandre Lima; Ledur,Mônica Corrêa; Oliveira,Maria Cristina Neves de; Marin,Silvana Regina Rockenbach; Ida,Elza Iouko; Shimokomaki,Massami.
Total RNA isolated from Pectoralis major muscle from PSE (L*24h>53.0, pH<5.8) and non-PSE (44<"L*24h>"53) meats of two phenotypically distinct chicken lines, broiler and layer, was used to investigate the α-ryr and β-ryr gene expression by real-time RT-PCR approach. Mean relative quantification (RQ) values were lower (p<0.05) for β-ryr in PSE chickens from both lines when compared to non-PSE chickens, while there was no difference (p>0.05) in α-ryr gene expression regardless of line studied. The β-ryr RQ results suggested that in PSE samples an alteration might occur in the regular ratio (1:1) of α-RyR/β-RyR normally found in avian muscles. These results provided the first evidence of PSE meat occurrence as a result of the differential...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Malignant hyperthermia; Poultry; Gene expression; Real time PCR.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600024
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