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A system to map the risk of infection by Puccinia kuehnii in Brazil Agronomy
Sumida, Ciro Hideki; Fantin, Lucas Henrique; Gonçalves, Ricardo Marcelo; Canteri, Marcelo Giovanetti; Araujo, Kelly Lana; Giglioti, Éder Antônio.
 Orange rust caused by the fungus Puccinia kuehnii greatly affects sugarcane and causes millions of tons of losses in production. This condition was first reported in Brazil at the end of 2009. The disease is currently present in most of the countries that produce this crop. The aim of this research was to develop risk maps of P. kuehnii infection using temperature and relative humidity data, provided by 389 automatic weather stations throughout the country. A spatial distribution analysis was carried out to assess the number of daily hours of favorable conditions for spore germination in each region. In the central-south region, where the main sugarcane producing states are concentrated, two distinct periods were observed during the three years studied....
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.01.02.00-1 orange rust; Sugarcane; Epidemiology; Prediction. Fitopatologia.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39905
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Avaliação de metodologias de adaptabilidade e estabilidade de cultivares milho - doi: 10.4025/actasciagron.v33i1.5817 Agronomy
Schmildt, Edilson Romais; UFES; Nascimento, Adriel Lima; UFES; Cruz, Cosme Damião; UFV; Oliveira, Jaqueline Aparecida Raminelli; UFES.
Este trabalho objetivou comparar três metodologias para análise de adaptabilidade e estabilidade de produtividade. Foi avaliada a produtividade de cultivares de milho do ensaio nacional da Embrapa, centro, nas safras agrícolas 2004/2005, 2005/2006 e 2006/2007, determinando-se a adaptabilidade e estabilidade pelos métodos de Lin e Binns com decomposição (CRUZ; CARNEIRO, 2006); Annicchiarico com decomposição (SCHMILDT; CRUZ, 2005) e um método proposto baseado no método de Annicchiarico com decomposição. Foram propostos a utilização do erro-padrão da média ao invés do desvio-padrão, no cálculo da variabilidade dos ambientes para cada cultivar e também o aumento do nível de confiança, de 75 para 95%. Percebeu-se que os resultados de indicação de cultivares...
Palavras-chave: 5.01.00.00-9; 5.01.03.05-9 Zea mays; Performance genotípica; Interação genótipo x ambiente Melhoramento Vegetal Zea mays; Genotypic performance; Genotype x environment interaction.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5817
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Characterization of race 65 of Colletotrichum lindemuthianum by sequencing ITS regions Agronomy
Coelho, Marcela; Gonçalves-Vidigal, Maria Celeste; Sousa, Lorenna Lopes de; Nunes, Maria Paula Barion Alves; Azevedo, Rafhael Felipin; Galván, Marta Zulema.
The present work aimed characterize isolates of C. lindemuthianum race 65 from different regions in Brazil by ITS sequencing. A total of 17 isolates of race 65, collected in the states of Mato Grosso, Minas Gerais, Paraná, Santa Catarina and São Paulo, were studied. Analysis of the sequences of isolates 8, 9, 12, 14 and 15 revealed the presence of two single nucleotide polymorphisms (SNPs) in the ITS1 region at the same positions. These isolates, when analyzed together with the sequence of isolate 17, revealed a SNP in the ITS2 region. The highest genetic dissimilarity, observed between isolates 11 and  3 and between isolates 11 and 10, was 0.772. In turn, isolates 7 and 2 were the most similar, with a value of 0.002 for genetic distance. The phylogenetic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.01.00.00-9; 5.01.03.00-8 anthracnose; Genetic variability; Pathogens; Dissimilarity Melhoramento Vegetal.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30586
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Chemical composition of grains from glyphosate-resistant soybean and its conventional parent under different edaphoclimatic conditions in Brazil Agronomy
Babujia, Letícia Carlos; Silva, Adriana Pereira; Biondo, Polyana Batoqui França; Garcia, Juliana Carla; Mandarino, José Marcos Gontijo; Visentainer, Jesui Vergilio.
Glyphosate-tolerant (Roundup Ready®, RR) soybean is the most widely cultivated genetically modified crop in the world. The aim of this study was to evaluate, in a long-term field experiment, the chemical composition of grains in a pair of cultivars composed of the conventional parent (BRS 133) and the nearly isogenic transgenic (BRS 245RR) soybean. Plants were cropped under two different edaphoclimatic conditions in Brazil. The experiments began during the 2003/2004 growing season; samples were collected during the 2011/2012 harvest. Were quantified the contents of isoflavones (high performance liquid chromatography), fatty acids (gas chromatography), lipid and proteins (near infrared spectroscopy in the NIR - Near Infrared Reflectance) and minerals...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.01.00.00-9; 5.07.01.00-2 Glycine max; Transgenic soybean crop; Isoflavones; Fatty acids; Macro and micro minerals. 5.07.01.01-0 5.07.01.01-0.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/25108
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Compatibility among fungicide treatments on soybean seeds through film coating and inoculation with Bradyrhizobium strains - doi: 10.4025/actasciagron.v32i4.5756 Agronomy
Pereira, Carlos Eduardo; Universidade Estadual de Santa Cruz; Moreira, Fátima Maria de Souza; Universidade Federal de Lavras; Oliveira, João Almir; Universidade Federal de Lavras; Caldeira, Carla Massimo; Universidade Federal de Lavras.
This research evaluated the development of soybean plants grown in a greenhouse, from seeds that were treated with fungicide, film coated and inoculated with Bradyrhizobium. Seeds from the soybean cultivar ‘Vencedora’ were submitted to treatments disposed in a factorial 5 x 3 x 2 design. The seeds were treated with Derosal Plus® with polymer; Tegran® with polymer; Derosal Plus® without polymer, Tegran® without polymer; and without fungicide and without polymer. After the chemical treatment, the seeds were inoculated with peat or liquid inoculants, and without inoculant. The chemical treatments were used either previous to or after the six months of storage. Seed inoculation was performed with CPAC15 and BR29 strains,...
Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.01.01.04-8; 5.01.02.05-2; 5.01.03.00-8; 5.01.03.03-2 Glycine Max; Polymer; Tegran; Derosal Plus; Bradyrhizobium Ciências Agrárias; Agronomia; Microbiologia e Bioquímica do Solo; Defesa Fitossanitária; Fitotecnia; Produção e Beneficiamento de Sementes Glycine Max; Polymer; Tegran; Derosal Plus; Bradyrhizobium.
Ano: 2010 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5756
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Estimates of the genetic parameters, optimum sample size and conversion of quantitative data in multiple categories for soybean genotypes - doi: 10.4025/actasciagron.v34i3.14015 Agronomy
Matsuo, Éder; Universidade Federal de Viçosa; Sediyama, Tuneo; Universidade Federal de Viçosa; Cruz, Cosme Damião; Universidade Federal de Viçosa; Oliveira, Rita de Cássia Teixeira; Bacuri Pesquisa e Sementes; Cadore, Luiz Renato; Universidade Federal de Viçosa.
The objective of this study was to estimate the genetic parameters and optimal sample size for the lengths of the hypocotyl and epicotyls and to analyze the conversion of quantitative data in multiple categories for soybean genotypes. A total of 85 soybean genotypes were analyzed in four experiments in a completely randomized design under greenhouse conditions at the Federal University of Viçosa, Brazil. The magnitude of the genetic parameter estimates characterized the influence of the genetic components in the phenotypic expression of the length of the hypocotyls and epicotyls of different soybean genotypes. The optimal size of the sample varied between the genotypes and the conversion of the quantitative data in multiple categories provided estimates of...
Palavras-chave: 5.01.00.00-9; 5.01.03.05-9; Glycine max; Soybean improvement; Hypocotyl length; Epicotyl length Melhoramento Vegetal.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/14015
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Genetic control of partial resistance to Asian soybean rust doi: 10.4025/actasciagron.v36i1.16919 Agronomy
Martins, Juliana Araújo Santos; Instituto Federal de Educação, Ciência e Tecnologia do Triângulo Mineiro; Juliatti, Fernando Cezar; Universidade Federal de Uberlandia.
The genetic control of rust resistance was studied using the Caiapônia x IAC-100 and Luziânia x Potenza crosses. The F2 and F3 generations were evaluated. Rust severity was quantified through visual assessment of the middle third of three leaflets per plant and performed by three different evaluators; the average score was calculated foreach individual plant. From these data, we estimated the mean and variance of the genetic components by employing the weighted least squares method. The estimated number of genes and broad- and narrow-sense heritabilities were also obtained. It was concluded that rust resistance is a characteristic controlled by 2 to 23 genes that are predominantly dominant. The estimate of narrow-sense heritability was greater than 70% for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.01.02.01-0; 5.01.03.05-9 Glycine max; Phakopsora pachyrhizi; Dominance variance; Heritability; Race non-specific disease resistance Melhoramento Vegetal e Fitopatologia.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16919
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Germination and seedling growth of ornamental species of Passiflora under artificial shade - doi: 10.4025/actasciagron.v34i1.11623 Agronomy
Pires, Marcel Viana; Universidade Federal de Viçosa - UFV; Almeida, Alex-Alan Furtado de; Universidade Estadual de Santa Cruz - UESC; Figueiredo, Abel Louro; Universidade Estadual de Santa Cruz - UESC; Gomes, Fábio Pinto; Universidade Estadual de Santa Cruz - UESC; Souza, Margarete Magalhães; Universidade Estadual de Santa Cruz - UESC.
Passiflora morifolia, P. suberosa litoralis, and P. palmeri var. sublanceolata are three wild species with ornamental potential that occur in Brazil. These species were evaluated with the purpose of determining the effects of different shade levels on seedling emergence and initial growth. Treatment with 50% shade resulted in the highest percentage of seedling emergence and the highest emergence speed index for all three species. The 50% shade level was the best condition for growth of P. morifolia and P. palmeri var. sublanceolata seedlings because in this condition, they presented higher growth in relation to control and the other treatments. However, P. suberosa litoralis can be considered a sun species because it grew better in full sunlight and 25%...
Tipo: Pesquisa em casas de vegetação e laboratório Palavras-chave: 5.01.00.00-9; 5.01.03.04-0; 5.01.03.06-7 Passifloraceae; Passion flowers; Emergence speed index; Development; Irradiance Produção Vegetal.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/11623
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Growth effects of water excess on coffee seedlings (Coffea arabica L.) Agronomy
Silveira, Helbert Rezende de Oliveira; Universidade Federal de Lavras; Santos, Meline de Oliveira; Universidade Federal de Lavras; Alves, Jose Donizeti; Universidade Federal de Lavras; Souza, Kamila Rezende Dázio de; Universidade Federal de Lavras; Andrade, Cinthia Aparecida; Universidade Federal de Lavras; Alves, Raphaella Gomes Martins; Universidade Federal de Lavras.
The objective of the present study was to evaluate the interference of water excess in soil on the growth of young coffee plants of the Mundo Novo and Catuaí cultivars.Plants were subjected to the following three different substrate water availability conditions: control (well-watered), continuous substrate waterlogged, and intermittent substrate waterlogged. Several growth-related traits were evaluated over the course of 19 weeks. Based on the number and quality of the affected variables from all forms of analyses, the Catuaí cultivar showed greater sensitivity to waterlogging. Both cultivars exhibited growth inhibition in response to substrate waterlogging stress, which was exacerbated by premature leaf dropping. 
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.01.00.00-9; 5.01.03.00-8 soil waterlogging; Hypoxia; Mundo novo cultivar; Catuaí cultivar 5.01.03.06-7.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17557
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Image analysis of coffee seeds submitted to the LERCAFE test Agronomy
Ribeiro, Bárbara Gomes; Abrahão, Christovão Pereira; Nery, Marcela Carlota; Nascimento, Rodrigo Marques; Rezende, Juliana Costa; Fialho, Cíntia Maria Teixeira.
The aim of this experiment was to quantify the stained areas of coffee seeds submitted to the LERCAFE test using image analysis. The seeds used were of the Catuaí Vermelho IAC 99 and Paradise cultivars. The physiological quality of the lots was assessed using germination tests, moisture content and a germination speed index. The LERCAFE test was conducted using seeds without parchment immersed in a solution of 3% sodium hypochlorite for 3 hours. Color photographs (RGB) with a resolution of 5 MPx were taken of each seed. The seeds were visually evaluated, and the functions generated from the analyses of the stained and non-stained regions were quantified by the Matlab R2009b program. Classification models were developed based on the Fisher Linear...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.01.03.00-8; 5.01.03.03-2 determinants functions; Sodium hypochlorite; Pixels Produção e Beneficiamento de Sementes.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/28268
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Influence of storage temperature on Epidendrum ibaguense flowers - doi: 10.4025/actasciagron.v33i1.6365 Agronomy
Mapeli, Ana Maria; Universidade Federal de Viçosa; Finger, Fernando Luiz; Universidade Federal de Viçosa; Barbosa, José Geraldo; Universidade Federal de Viçosa; Barros, Raimundo Santos; Universidade Federal de Viçosa; Oliveira, Lucilene Silva; Universidade Federal de Viçosa; Segatto, Fernanda Bastos; Universidade Federal de Viçosa.
The present work was carried out to evaluate the influence of temperature and wet-versus-dry storage on longevity, respiration and ethylene production during storage of E. ibaguense flowers. The inflorescences were harvested and stored at 5, 10, 15, 20, 25, 30, 35, and 40°C, in water or dry, until complete senescence. Respiration increased when inflorescences were treated with wet or dry storage. The Q10 factor for this flower, at temperatures ranging from 5 to 40°C, was similar to most fresh horticultural products, varying between 1.2 and 3.31 depending on storage temperature. Production of ethylene by the inflorescence was maximal at 20°C for flowers maintained in water, and at 35°C for those flowers kept dry, followed by...
Palavras-chave: 5.01.00.00-9; 5.01.04.01-2; 5.07.01.04-5 Storage; Q10 factor; Chilling symptoms Agronomia; Floricultura; Fisiologia Pós-colheita Storage; Q10 factor; Chilling symptoms.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6365
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Multivariate technique for determination of soil pedoenvironmental indicators in Southern Amazonas Agronomy
Oliveira, Ivanildo Amorim de; Marques Júnior, José; Campos, Milton César Costa; Aquino, Renato Eleoterio de; Freitas, Ludmila de; Ferraudo, Antônio Sérgio.
The use of statistical techniques to evaluate soil attribute behaviour is an important tool for choosing the most adequate form of soil management. Thus, the aim of this study was to jointly assess the physical and chemical attributes and the magnetic susceptibility characteristics of three environments and to use multivariate statistics to define which attributes have the greatest potential as environmental change indicators. The study was conducted in three areas: one with archaeological black earth (and planted maize); one with pasture; and one of the forest. Sixty-four (64) deformed and non-deformed soil samples each were collected within these areas, with a 70 x 70 m grid spaced every 10 meters at depths of 0.0-0.2 and 0.4-0.6 m, to determine the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.01.01.00-5; 5.01.01.06-4; 5.01.01.02-1; 5.01.01.03-0 main component; Amazonian; Archaeological dark earth Manejo e Conservação do Solo; Física do Solo; Química do Solo.
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30763
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‘Navelina’ oranges submitted to pre-harvest resistance inducers Agronomy
Kirinus, Marines Batalha Moreno; Barreto, Caroline Farias; Silva, Pricila Santos da; Oliveira, Roberto Pedroso de; Malgarim, Marcelo Barbosa; Fachinello, José Carlos.
 The objective of this study was to evaluate the physical-chemical characteristics, rot index and bioactive compounds of ‘Navelina’ oranges under postharvest refrigerated storage conditions after pre-harvest resistance induction in crops from 2015 and 2016. The field experimental design was completely randomized blocks. The treatment factors were composed of the following resistance inducers: noresistance inducer (control), selenium (Se), silicon (Si), acibenzolar-s-methyl (ASM), methyl jasmonate (MeJa), thiamethoxam (TMT) and imidacloprid (IMI). In the laboratory, the experimental design was the same as that in the field, but it used a two-factor scheme instead of a unifactorial scheme. In the two-factor scheme, factor A was composed of the abovementioned...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.01.00.00-9; 5.01.03.00-8; 5.01.03.06-7; 5.01.03.01-6 Citrus sinensis; Navel orange; Elicitors; Refrigerated storage; Rotting. Fisiologia de Plantas Cultivadas; Manejo e tratos culturais.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39465
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Older leaf tissues in younger plants are more susceptible to soybean rust Agronomy
Xavier, Sheila Ariana; Martins, Daiane Cristina; Fantin, Lucas Henrique; Canteri, Marcelo Giovanetti.
The aim of this study was to clarify the relationship between soybean leaf/plant age and the susceptibility to infection by Phakopsora pachyrhizi. Two studies were conducted in the greenhouse during the 2009/2010 season using the BRS 232 cultivar. The experimental design for Study 1 was fully randomized in a 2 x 3 factorial arrangement (phenological stage x age of the 4th, 5th and 6th trifoliate at the time of inoculation), and in Study 2, the experimental design was fully randomized with five treatments (T) and four replicates. The variables assessed were disease severity, number of lesions, uredinia per lesion, and viable spores. In Study 1, it was observed that disease severity was lower when the plant was in the growth stage V6 (11.4%), compared to the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.01.02.00-1 Phakopsora pachyrhizi; Phenological stage; Age of trifoliates Fitopatologia.
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30638
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Pré-condicionamento das sementes de mamoneira para o teste de tetrazólio - doi: 10.4025/actasciagron.v33i2.6025 Agronomy
Gaspar-Oliveira, Carolina Maria; UNESP; Martins, Cibele Chalita; Faculdade de Ciências Agronômicas / UNESP - Botucatu-SP; Nakagawa, João; Faculdade de Ciências Agronômicas - UNESP Botucatu-SP.
O objetivo do trabalho foi padronizar a metodologia de pré-condicionamento das sementes de mamoneira (Ricinus communis L.) para a avaliação do potencial fisiológico pelo teste de tetrazólio. Testaram-se os seguintes métodos de pré-condicionamento: sementes com tegumento entre papel umedecido a 30, 35 e 40°C por 6, 8, 10, 12, 14, 16 e 18h; sementes sem tegumento entre papel umedecido e sementes com tegumento imersas em água a 25, 30, 35 e 40° C por 1, 2, 3, 4, 5 e 6h. Após o pré-condicionamento, removeu-se o tegumento das sementes, que foram cortadas no sentido do comprimento e imersas na solução de tetrazólio a 0,2%, por 120 min., a 35°C. Avaliaram-se a porcentagem de germinação das sementes, o teor de água, antes e após a...
Palavras-chave: 5.01.00.00-9; 5.01.03.00-8; 5.01.03.03-2 Viabilidade; Mamona; Metodologia; Potencial fisiológico Agronomia; Fitotecnia; Produção e Beneficiamento de Sementes Viability; Castor bean; Methodology; Physiological potential.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6025
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Processamento de produto farináceo a partir de beterrabas submetidas à secagem estacionária - doi: 10.4025/actasciagron.v33i2.4885 Agronomy
Araújo Filho, Djalma Gomes de; UEPG; Eidam, Tânia; UEPG; Borsato, Aurélio Vinicios; Embrapa Pantanal; Raupp, Dorivaldo da Silva; UEPG.
O consumo de hortaliças desidratadas tem sido estimulado pela praticidade de uso, maior tempo de conservação comparado à in natura e possibilidade de aproveitamento da produção excedente, reduzindo efeitos de sazonalidade. A pesquisa propôs produzir uma farinha de beterraba com a aplicação de procedimentos tecnológicos simples e disponíveis para grande parte dos pequenos produtores. Foram comparados diferentes cortes de beterraba, longitudinais (long 2; 4,5; 9 mm) e transversais (trans 2; 4,5; 9 mm), quanto ao tempo de secagem e de trituração, taxa de secagem, rendimento em produto farináceo e sua granulometria. Considerando que a taxa de secagem foi baixa, que o tempo de permanência do produto no secador foi baixo, que a farinha apresentou baixa...
Tipo: Pesquisa aplicada para pequeno produtor Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.01.03.00-8 farinha de beterraba; Secagem; Agroindústria; Alimento funcional Fitotecnia e Produção Vegetal beet flour; Drying; Agroindustry; Functional food.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4885
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Produção de biomassa e teor de óleo essencial em função da idade e época de colheita em plantas de hortelã-japonesa - doi: 10.4025/actasciagron.v33i2.5698 Agronomy
Chagas, Jorge Henrique; Universidade Federal de Lavras; Pinto, Jose Eduardo Brasil Pereira; Universidade Federal de Lavras, Laboratório de Cultura de Tecidos e Plantas Medicinais.; Bertolucci, Suzan Kelly Vilela; Universidade Federal de Lavras; Santos, Fúlvia Maria do; Unviersidade Fderal de Lavras.
O presente estudo objetivou avaliar o efeito da época e da idade da planta na colheita na produção de biomassa seca e no teor percentual do óleo essencial e o tempo de armazenamento das plantas de Mentha arvensis L. Foram instalados dois experimentos. No primeiro, foi avaliado o efeito de três idades na colheita, 80, 100 e 120 dias após o transplantio, e três idades na segunda colheita, 60, 75 e 90 dias. O delineamento utilizado foi de blocos casualizados, com quatro repetições, em esquema fatorial 3 x 3. No segundo experimento, foram avaliadas três épocas de colheita: início de janeiro, final de março e início de junho. O material colhido foi seco em estufa a 37°C, calculada a biomassa seca da parte aérea, extraído o óleo essencial em aparelho de...
Palavras-chave: 5.01.00.00-9; 5.01.03.00-8 planta medicinal; Mentha arvensis L.; Óleo essencial; Colheita Fitotecnia medicinal plant; Mentha arvensis L.; Essential oil; Harvest.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5698
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Qualidade fisiológica de sementes de uva-do-japão após envelhecimento acelerado e armazenamento - doi: 10.4025/actasciagron.v32i3.4491 Agronomy
Pereira, Gabriely Pinto; Pontifícia Universidade Católica do Paraná; Carvalho, Ruy Inacio Neiva de; Pontifícia Universidade Católica do Paraná; Biasi, Luiz Antonio; Universidade Federal do Paraná.
Este trabalho objetivou avaliar o efeito do teste de envelhecimento acelerado e de condições de armazenamento na qualidade fisiológica de sementes de Hovenia dulcis. O teste de envelhecimento acelerado foi realizado com seis tempos (0, 24, 48, 72, 96 e 120 horas) e quatro repetições. O armazenamento foi estudado num esquema fatorial 2 x 7, sendo um fator a condição de armazenamento (ambiente de laboratório e geladeira) e o outro fator, o tempo de armazenamento (0, 8, 16, 24, 32, 40 e 48 semanas), com quatro repetições. O envelhecimento acelerado foi realizado à temperatura de 45°C e as sementes foram armazenadas ao ambiente e em geladeira, à temperatura de 4 a 7°C e umidade relativa do ar de 40 a 50%, ambos no escuro. As variáveis...
Tipo: Pesquisa Básica Palavras-chave: 5.01.00.00-9; 5.01.03.00-8 Hovenia dulcis; Entropia; Germinação 5.01.03.03-2 Hovenia dulcis; Entropy; Germination.
Ano: 2010 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4491
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Successive mini-cuttings collection in Piptocarpha angustifolia mini-stumps: effects on maturation, adventitious root induction and root vigor Agronomy
Stuepp, Carlos André; Wendling, Ivar; Koehler, Henrique Soares; Zuffellato-Ribas, Katia Christina.
The low percentage of seed germination and adventitious root induction in cuttings of Piptocarpha angustifolia has limited its silvicultural use. Thus, we studied the effect of tissue maturation on successive collections of mini-cuttings grown in a semi-hydroponic system. Likewise, we evaluated potential multiplication via the mini-cutting technique by assessing the survival and productivity of mini-stumps as well as the formation of adventitious roots and the root vigor. We made 32 sprout collections during two years in a clonal mini-garden. From these collections, mini-cutting experiments were installed throughout several seasons. Mini-cuttings of 8±1 cm long were prepared, planted in boxes with vermiculite and carbonized rice husk (1:1 v/v) and placed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 2.03.03.00-9; 2.03.03.02-5; 5.01.00.00-9; 5.01.03.04-0; 5.01.03.06-7; 5.02.01.00-0 juvenility; Multiplication rate; Ontogenetic age; Root induction; Vegetative propagation. Ciências Agrárias.
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/31059
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The effect of high dilutions of Pulsatilla nigricans on the vigour of soybean seeds subjected to accelerated aging - doi: 10.4025/actasciagron.v34i2.13043 Agronomy
Silva, Hingrid Ariane da; Universidade Estadual de Maringá; Valderrama, Angela Parizotto; Universidade Estadual de Maringá; Moreira, Flavia Carolina; Universidades Estadual de Maringá; Marques, Rosimar Maria; Universidade Estadual de Maringá; Reis, Bruno; Universidade Estadual de Maringá; Bonato, Carlos Moacir; Universidade Estadual de Maringá.
The aim of this study was to evaluate the effect of high dilutions of Pulsatilla nigricans in dinamisations 6, 12, 18, 24 and 30 CH on the vigour of soybean seeds subjected to accelerated aging. The experiment was conducted according to a randomised design with 6 treatments and 10 replicates. The treatments consisted of dinamisations 6, 12, 18, 24 and 30 CH and a distilled-water control. After the treatments, the seeds were subjected to accelerated aging (48h at 42ºC) in a growth chamber (25 ± 2ºC). The study evaluated the germination, the length of primary roots and shoots, the fresh weight of roots and shoots and the enzymatic activity of peroxidase (POX-EC1.11.1.7). The variables were analysed by ANOVA, and the means were compared using the Scott-Knott...
Tipo: Pesquisa controlada Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.02.01.06-9 dinamisation; Accelerated aging; Germination growth; Homeopathy; Glycine max Fisiologia de Plantas Cultivadas.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/13043
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