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| Registros recuperados: 496 | |
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| WOOLRICH-PIÑA,GUILLERMO A; GEOFFREY R,SMITH; LEMOS-ESPINAL,JULIO A; MONTOYA-AYALA,RAYMUNDO; ÁVILABOCANEGRA,LUIS E; BENAVIDES GARDUÑO,EDUARDO. |
| The distribution and abundance of organisms within a pond or lake can reflect the result of a variety of factors. We examined the abundance of the endemic fish, Poblana alchichica, in Lago de Alchichica, Puebla, Mexico, as well as how the abundance varied among months. Dissolved oxygen, temperature, and salinity varied among months. The abundance of Poblana alchichica peaked in December and February. For the months when fish were observed, their abundances were positively related to dissolved oxygen concentration and were generally not related to temperature. Our results provide evidence that there is substantial seasonal variation in the abundances of Poblana alchichica and that within months, their distributions are likely driven by dissolved oxygen than... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abundance; Dissolved oxygen; Poblana alchichica; Salinity; Seasonal variation; Temperature. |
| Ano: 2012 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2012000100015 |
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| Ribeiro,Raquel Menestrino; Tessarolo,Geizianne; Soares,Thannya Nascimento; Teixeira,Itamar Rosa; Nabout,João Carlos. |
| ABSTRACT We experimentally evaluated how different temperatures affect germination of individual seedlings of Dipteryx alata, and estimated the impact of climate change on the species using ecological niche modeling. A total of 240 seeds were randomly distributed among three different temperature treatments (32 ºC, 36 ºC, and 40 ºC), and monitored for 35 days. We measured seven seed traits and estimated the ecological niche of D. alata using a consensus of four methods. The treatment with the highest temperature produced smaller and lighter seedlings. The consensus of ecological niche modeling indicated that are expected to reduce the areas with climates favorable for D. alata in future scenarios. Thus, our two results (experiment and ecological niche... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climatic scenarios; Germination; Global climate change; Ecological niche model; Temperature. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300446 |
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| Rezvani,Mohammad; Zaefarian,Faezeh; Amini,Vajihe. |
| Shepherd's purse (Capsella bursa-pastoris) is a problematic weed in citrus orchards and crop fields in northern Iran. In a series of laboratory and greenhouse experiments, we evaluated the effects that treatment with gibberellic acid (GA3) and potassium nitrate (KNO3), as well as environmental factors, including temperature, the duration of pre-chilling (wet and dry), drought stress, salt stress, pH, and sowing depth, have on seed dormancy breaking and germination in C. bursa-pastoris. Treatment with GA3 strongly stimulated germination of C. bursa-pastoris in conditions of light/dark and continuous darkness. The germination rate was highest (40.08%) for seeds treated with 400 ppm of GA3 in the light/dark condition. Treatment with KNO3 did not significantly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drought and salt stress; Gibberellic acid; Light; Temperature; Sowing depth. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400002 |
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| Costa, Lílian Moreira; Instituto Federal de Educação, Ciência e Tecnologia Goiano - campus Rio Verde – Goiás; Resende, Osvaldo; Instituto Federal de Educação, Ciência e Tecnologia Goiano - campus Rio Verde – Goiás; Gonçalves, Douglas Nascimento; Instituto Federal de Educação, Ciência e Tecnologia Goiano - campus Rio Verde – Goiás; Souza, Kelly Aparecida; Instituto Federal de Educação, Ciência e Tecnologia Goiano - campus Rio Verde – Goiás; Sales, Juliana de Fátima; Instituto Federal de Educação, Ciência e Tecnologia Goiano - campus Rio Verde – Goiás; Donadon, Juliana Rodrigues; Instituto Federal de Educação - campus Rio Verde. |
| This study was performed to evaluate the physiological quality of Crambe abyssinica Hochst fruits subjected to drying under different treatments with air. The crambe fruits, with moisture content of 21.0 ± 1.3 (% w.b.), were manually collected and dried until their moisture content reached 7.0 ± 1.4 (% w.b.). The crambe fruits were dried with natural air (23°C mean temperature and 60.6% average relative humidity) and seven days after harvest in an experimental dryer with forced ventilation at temperatures of 30, 40, 50, 60 and 70°C and relative humidities of 37.4, 22.3, 14.0, 8.3 and 5.1%, respectively. The evaluation was the percent germination, the germination speed index (GSI), the amount of water absorption and the electrical conductivity. The results... |
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Palavras-chave: Oilseed; Temperature; Crambe abyssinica Hochst 5.01.03.03-2 Produção e Beneficiamento de Sementes. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/12482 |
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| Martins, Samuel Julio; Medeiros, Flavio Henrique Vasconcelos; Souza, Ricardo Magela; Vilela, Laize Aparecida Ferreira. |
| Abiotic stress interferes with plant-microbial interactions, but some microorganisms may buffer this interference. We investigated the interaction between temperature and bacterial wilt (Curtobacterium flaccumfaciens pv. flaccumfaciens - Cff) biocontrol and the ability of Bacillus subtilis strain ALB629 to colonize bean seedlings, to inhibit pathogen growth and to use different C and N sources. B. subtilis ALB629rif, a mutant selected from the wild population of ALB629, was used to monitor plant colonization at 20°C and 30°C. ALB629rif was detected only in the plant roots (103.22 CFU g-1) at the lower temperature but colonized the roots, stems, and leaves (105.85, 104.48, and 104.01 CFU g-1), respectively, at 30ºC. The area under the disease progress curve... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.02.01-0 seed treatment; Phaseolus vulgaris; Antibiosis; Temperature; Rhizobacteria; PGPR Fitopatologia. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18018 |
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| Biaggioni, Marco Antônio Martin; UNESP - Botucatu; Lopes, Ana Beatriz de Castro; UNESP - Botucatu; Jasper, Samir Paulo; UNESP - Botucatu; Berto, Dirlei Antonio; UNESP - Botucatu; Gonçalves, Elisa Vidal; UNESP-Botucatu. |
| Visando estabelecer a contribuição dos parâmetros físicos na qualidade final da silagem de grãos úmidos de milho, foi conduzido experimento, no interior de câmara climatizada, simulando cinco condições de temperatura ambiente (5°C 24h-1 por dia; 25°C 24h-1 por dia; 40°C 24h-1 por dia; 20°C 16h-1 por dia + 5°C 8h-1 por dia; 30°C 16h-1 por dia + 20°C 8h-1 por dia) e duas condições de pressão no interior dos tambores de armazenagem (com e sem pressão interna). Para se determinar os efeitos sobre o grau de disponibilidade do amido na silagem pronta, procedeu-se a análises para avaliar a qualidade final da silagem (teor de umidade, pH, ácidos orgânicos, amido total e granulometria). O delineamento... |
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Palavras-chave: 5.01.00.00-9 Agronomia silagem; Qualidade; Temperatura; Pressão silage; Quality; Temperature; Pressure. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/325 |
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| Strenske, Andressa; Vasconcelos, Edmar Soares de; Egewarth, Vanessa Aline; Herzog, Neusa Francisca Michelon; Malavasi, Marlene de Matos. |
| In this experiment, we assessed the germination and vigor of quinoa seeds packed in paper bags and stored at room temperature for 36, 85, 119, 146, 177 and 270 days. The seeds were harvested under experimental conditions in Marechal Candido Rondon, Paraná, during the 2012/13 growing seasons. Four replicates of 100 seeds each were established for each storage time, and the seeds were evaluated, on paper, based on the BOD under the following experimental temperature conditions: alternating temperatures of 20 and 30°C and a constant temperature of 25°C. The seeds from both treatments were subject to seven-hour photoperiods and 25°C under continuous darkness. The germinated seeds were counted daily for eight days after sowing, and we evaluated the percentages... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.03.03-2 Germination test; Temperature; Photoperiod; Seed vigor Produção e Beneficiamento de Sementes. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30989 |
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| Caixeta, Marilda Pereira; UEM; Corazza, Maria Júlia; UEM; Oliveira, Ricardo Ribeiro de; UEM; Zanutto, Carlos Alexandre; UEM; Nunes, William Mário de Carvalho; UEM; Vida, João Batista; UEM. |
| O presente trabalho teve como objetivo identificar 11 isolados de Guignardia citricarpa, agente causal da mancha preta dos citros (MPC), obtidos de frutas cítricas sintomáticas de diferentes regiões geográficas, por meio da PCR e caracterização morfofisiológica das estruturas propagativas, esporulação e crescimento micelial em diferentes meios de cultura, temperaturas e regimes de luz, nas condições de laboratório. Pelo teste de PCR, todos os isolados foram identificados como o patógeno G. citricarpa. Os isolados caracterizados foram submetidos às temperaturas de 20, 25 e 30ºC, em regime de luz contínua, escuro contínuo e fotoperíodos de 12 horas, durante 24 dias. Utilizaram-se os meios de cultura aveia-ágar (AA), batata-dextrose-ágar (BDA) e... |
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Palavras-chave: 5.01.02.00-1 Fitossanidade G. citricarpa; PCR; Esporulação; Crescimento micelial; Temperatura; Meio de cultura; Fotoperíodo. G. citricarpa; PCR; Sporing; Mycelial growth; Temperature; Mean of culture; Photoperiod. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5962 |
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| Toledo, Vagner de Alencar Arnaut de; UEM; Neves, Carolina Antunes; Copebrás; Alves, Eloi Machado; UEM; Oliveira, Jussara Ricardo de; Universidade Paranaense; Ruvolo-Takasusuki, Maria Cláudia Colla; UEM; Faquinello, Patrícia; UEM. |
| O objetivo foi avaliar o efeito da suplementação proteica sobre a produção de geleia real em colônias de Apis mellifera e correlacionar esta produção com as variáveis climáticas. Os tratamentos foram: colônias que receberam uma ração elaborada com 35% de proteína; colônias que receberam suplemento proteico comercial com 35% de proteína bruta e colônias que não receberam ração proteica. Não houve diferença (p > 0,05) entre os tratamentos para as variáveis de produção. As médias foram: quantidade de larvas aceitas, 8,56 ± 6,76; porcentagem de aceitação, 29,20 ± 22,03%; quantidade de geleia real produzida por colônia, 1,83 ± 0,82 g e quantidade produzida por cúpula, 213,58 ± 108,36 mg. A precipitação pluviométrica não influenciou (p > 0,05) a produção... |
| Tipo: Pesquisa de campo |
Palavras-chave: 5.04.05.00-4 Apis mellifera; Nutrição de abelhas; Proteína; Umidade relativa; Temperatura 5.04.05.02-0 Apis mellifera; Honeybee nutrition; Protein; Relative humidity; Temperature. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/6836 |
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| Guedes, Roberta Sales; UNIVERSIDADE FEDERAL DA PARAIBA; Alves, Edna Ursulino; UNIVERSIDADE FEDERAL DA PARAIBA; Gonçalves, Edilma Pereira; UFRPE; França, Pablo Radamés Cabral de; UNIVERSIDADE FEDERAL DA PARAIBA; Moura, Macio Faria de; UNIVERSIDADE FEDERAL DA PARAIBA; Santos, Sueli da Silva; UNIVERSIDADE FEDERAL DA PARAIBA. |
| Dalbergia nigra (Vell.) Fr. All., conhecida popularmente como jacarandá-da-bahia, é uma espécie bastante conhecida pela exploração da sua madeira. Foi realizado um experimento no Laboratório de Análises de Sementes (CCA/UFPB) Areia, Estado da Paraíba, com o objetivo de determinar metodologia adequada para a condução de testes de germinação e vigor com sementes de D. nigra. O experimento foi conduzido em delineamento inteiramente ao acaso, em esquema fatorial 2 x 7, sendo duas temperaturas (25 e 20-30°C) e sete substratos (entre areia, entre vermiculita, bioplant®, plantmax®, entre e sobre papel mata-borrão e papel toalha), com quatro repetições de 25 sementes cada. As características avaliadas foram: germinação (%), primeira contagem de... |
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Palavras-chave: 2.03.03.00-9 sementes florestais; Jacarandá-da-bahia; Vigor; Substrato; Temperatura 2.03.03.03-3 forest seeds; Jacarandá-da-bahia; Vigor; Substrate; Temperature. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5834 |
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| Dias Junior, Walter; Mourgués-Schurter, Lea Rosa; UFLA. |
| To evaluate circadian changes in thyroid hormones of piau, Leporinus obtusidens Valenciennes, 1847, (Osteichthyes, Anostomidae) after feeding were determined the plasma levels of thyroid hormones (TH) of 128 fishes, same age, immature, both sexes, distributed into four classes of weight. They were kept in 16 aquaria (100 L), with artificial aeration and 2 L min. -1 water flow, from March to August, 1996, in Aquaculture Station of the Universidade Federal de Lavras (UFLA). Daily, feed was supplied at 5% body weight. For blood samples, the fishes were anesthetized with benzocaine 10%, and plasmatic levels of TH were determined at 1, 4, 7, 10, 13, 16 and 22h after food supply during 4 consecutive days in June and in August, period of lowest temperature. The... |
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Palavras-chave: 2.07.04.00-3 T3 T4; Teleost fish; Temperature; Photoperiod Fisiologia Comparada. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5814 |
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| Roy, Dipika; Saha, Chayan Kumer; Alam, Md. Monjurul; Alam, Md. Ashraful; Sarker, Tumpa Rani. |
| Proper and timely drying is needed for producing quality paddy seed. Open sun drying is often produced seed with foreign materials. Solar dryer produced by science for society (S4S), India might be suitable for country like Bangladesh. Therefore, an attempt was taken to evaluate S4S seed dryer at the Workshop, Department of Farm Power and Machinery, Bangladesh Agricultural University, Mymensingh. In this experiment, the spatial and temporal distribution of temperature and moisture in S4S solar grain dryer was investigated and the seed quality was also evaluated. The dryer performance was evaluated with six trials in Boro season from May 10 to June 6, 2017 and with three trials in Aman season from November 7 to 11, 2017. Paddy seed samples were also dried... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solar drying; Temperature; Moisture content; Drying loss; Germination. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5957 |
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| Registros recuperados: 496 | |
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