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Idioma Inglês (25) Português (7) Francês (5) Espanhol (2) Thailandês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 41 Primeira ... 1 2 3 ... Última Abscisic acid and the antioxidant system are involved in germination of Butia capitata seeds Acta Botanica Bicalho,Elisa Monteze; Santos,Talita R. Silva dos; Garcia,Queila Souza. ABSTRACT Seed germination is an important step for plants without vegetative propagation and is a physiological process that begins with specific environmental cues resulting in biochemical responses. Breaking-dormancy is necessary to study germination in dormant seeds with asynchronous germination. We investigated the processes of breaking dormancy and germination of Butia capitata (Arecaceae) seeds, in which germination is slow and asynchronous, by operculum removal. This treatment increased germination of B. capitata to 90 %. Embryos of dry, imbibed, 24-hours post-operculum removal and early-germinated seeds were collected for biochemical analysis of the following: quantification of abscisic acid (ABA) and hydrogen peroxide (H2O2), activities of... Tipo: Info:eu-repo/semantics/other Palavras-chave: Breaking-dormancy; Haustorium; Hormones; Palm seeds; Operculum; Physiological dormancy; Reactive oxygen species. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100174 Efeito da suplementação alimentar nas respostas fisiológicas, hormonais e sanguíneas de ovelhas Santa Inês, Ile de France e Texel - DOI: 10.4025/actascianimsci.v31i4.4920 Animal Sciences Amaral, Daniele Francine; UEM; Barbosa, Orlando Rus; UEM; Gasparino, Eliane; UEM; Akimoto, Luciene Setsuko; UEM; Lourenço, Fábio José; UEM; Santello, Graziela Aparecida; UEM. Avaliou-se a suplementação de proteína (12% de proteína bruta (PB) (T1) e 16% de PB (T2)) na temperatura retal (TR), frequências respiratória (FR) e cardíaca (FC), glicose (Gl), albumina (Alb), proteínas totais (PT), triiodotironina (T3) e tiroxina (T4) de 16 ovelhas Santa Inês, 16 Texel e 15 Ile de France. A FR não diferiu no T1 e T2 na Santa Inês e Ile de France, sendo maior na Texel no T2. FR aumentou na primavera, na Texel, seguida da Ile de France e pela Santa Inês e caiu no outono para Santa Inês e Ile de France. FR foi maior à tarde, na Texel, na Ile de France e na Santa Inês. Maior FC na Santa Inês e Texel no T1 e menor na Ile de France. FC na Santa Inês foi superior nas estações do ano, e na primavera maior para todas as raças. Maior Gl, PT, Alb e... Tipo: Pequisa de campo Palavras-chave: Dieta; Proteína; Condições climáticas estresse térmico; Hormônios; Ovelhas Ecologia dos Animais Domésticos e Etologia diet; Protein; Weather conditions; Heat stress; Hormones; Sheep. Ano: 2009 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4920 Determination of endogenous IAA and carbohydrates during the induction and development of protocorm-like bodies of Cattleya tigrina A. Richard Biological Sciences De Conti, Daniela; Corredor-Prado, Jenny Paola; Roecker Junior, Djalma; Suzuki, Rogério Mamoru; Guerra, Miguel Pedro; Pescador, Rosete.  Tissue culture techniques have been employed for orchid mass propagation by means of the morphogenetic route of protocorm like-bodies (PLBs). This study aimed to analyze and compare Indole-acetic acid (IAA) and sugar endogenous levels in protocorm-like bodies (PLBs) induction and development in Cattleya tigrina, in order to better understand this process and to optimize micropropagation procedure protocols. Leaves grown on MS (Murashige and Skoog) culture medium, suplemented with 9 μM TDZ for PLBs induction and development were collected after 0, 2, 7, 14, 30, 60 and 100 days of cultivation, for further analysis. Increase of IAA and reduction of sugar levels are strongly related to morphogenetic response, that is, PLBs formation over the preexisting ones... Tipo: Info:eu-repo/semantics/article Palavras-chave: Orchid; Hormones; Sugars; Morphogenesis.. Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/37874 Effect of pain related of sex and estrous cycle on blood plasma glucose, free fatty acids and corticosterone in rats - doi: 10.4025/actascibiolsci.v34i4.10568 Biological Sciences Moraes, Elzira Diniz de; Instituto de Ensino Superior de Londrina; Zaia, Cássia Thaís Bussamra Vieira; Universidade Estadual de Londrina; Zaia, Dimas Augusto Morozin; Universidade Estadual de Londrina; Santos, Angelo Alexander Torres dos; Universidade Estadual de Londrina; Ribeiro, Rachel Cezar de Andrade; Universidade Estadual de Londrina; Silva, Andreia Lopes da; Universidade Estadual de Londrina. Sex differences related with pain have been studied and evidences suggesting influence of sex steroid hormones on the thresholds of pain. Experimental nociception has been test using formalin as a model of nociceptive stimulus. Association of stress, pain and metabolic and hormonal changes has not been explored. The aim of this study was to compare metabolic and hormonal changes between male rats and female rats in proestrus and estrus cycle after painful stimulus by formalin into the masseter muscle. Male and female Wistar rats (200-250 g b.w.) were submitted to an injection of formalin (F, 1.5%) or saline (S, 9.9%) into the masseter muscle and after 0 (N, control group without injection), 5, 15, 30 or 60 minutes they were decapitate and blood was... Tipo: Estudos fisiológicos Palavras-chave: 2.00.00.00-6 sex differences; Nociception; Stress; Hormones; Rats 2.07.00.00-8. Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10568 Rhodnius prolixus Malpighian tubules and control of diuresis by neurohormones Anais da ABC (AABC) Martini,Sabrina V.; Nascimento,Suzete B.; Morales,Marcelo M.. Rhodnius prolixus Malpighian tubules (MTs) are a good model for fluid and ion secretion studies in view of the dramatic postprandial diuresis, which follows its massive blood meals. Ingestion of a blood meal equals to 10-12 times their initial body mass, leads to rapid activation of high output by excretory system, which eliminates 40-50% of the fluid mass. Secretion of ions and water is stimulated 1000-fold by serotonin and diuretic hormone. These hormones cooperate synergistically to activate adenylate cyclase activity from MTs cells, which increase the level of intracellular cAMP. The anti-diuretic hormones have also an important role in the fluid maintenance of Rhodnius prolixus. Several hours after insect feeding occurs a reduction in urine flow, that... Tipo: Info:eu-repo/semantics/article Palavras-chave: Malpighian tubules; Rhodnius prolixus; Hormones; Fluid secretion. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000100011 Effects of hormonal priming on seed germination of pigeon pea under cadmium stress Anais da ABC (AABC) SNEIDERIS,LARISSA C.; GAVASSI,MARINA A.; CAMPOS,MARCELO L.; D'AMICO-DAMIÃO,VICTOR; CARVALHO,ROGÉRIO F.. In this work we investigated whether priming with auxin, cytokinin, gibberellin, abscisic acid and ethylene, alters the physiological responses of seeds of pigeon pea germinated under water and cadmium stress. Seeds treated with water or non-treated seeds were used as control. Although compared to non-treated seeds we found that the hormone treatments improve the germination of pigeon pea under cadmium stress, however, these treatments did not differ from water. However, we also observed a trend of tolerance to the effects of cadmium in the presence of ethylene, suggesting that the use of this hormone may be an efficient method to overcome seed germination under metal stress. Tipo: Info:eu-repo/semantics/article Palavras-chave: Cajanus Cajan; Heavy metal; Hormones; Pretreatment in seeds; Abiotic stress. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401847 Effect of the dry matter intake level on the sanguine profile of glucose, insulin, urea, estrogen and progesterone and concentration of IGF-I in the follicular liquid of crossbred heifers BABT Rigolon,Luiz Paulo; Prado,Ivanor Nunes do; Cavalieri,Fábio Luiz Bim; Nascimento,Willian Gonçalves do; Copovila,Luiz Carlos; Ramos,Fabíola dos Santos; Moreira,Fernanda Barros. The aim of this work was to study effect of the dry matter intake level on the concentrations of glucose, insulin, urea, estrogen and progesterone in the blood and the level of IGF-I in the follicular liquid of heifers. Twenty seven crossbred heifers were used, in three treatments: 1.2, 1.6 and 2.6% of the live weight of dry matter intake (DMI) daily. The sanguine concentrations of glucose and estrogen were higher in the animals with 1.6% of DMI and the insulin levels were higher in the animals with 2.6% of DMI. There was an increase in the sanguine levels of urea with the increase of the DMI. There was no effect of the DMI on the progesterone levels in the sanguine plasma collected from the jugular. The progesterone levels in caudal vena were higher in... Tipo: Info:eu-repo/semantics/article Palavras-chave: FSH; Hormones; Intake; Nutrition; Reproduction; Superovulation. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100008 Effects of Sodium Nitrate and Mixotrophic Culture on Biomass and Lipid Production in Hypersaline Microalgae Dunaliella Viridis Teod BABT Kharati-Koupaei,Mansour; Moradshahi,Ali. To access the potential application of Dunaliella viridis Teod. for biofuel production, the effects of culture media composition on biomass and lipid content of this microalgae were investigated. Measured at the 20 th day, sodium nitrate at 5.0 mM augmented biomass production by 26.5 percent compared to control (1 mM sodium nitrate). Total lipids expressed as µg mL-1 of culture also increased with increase in nitrate concentration up to 5.0 mM sodium nitrate, whereas when expressed on the per cell basis, total lipids stayed relatively constant at most of the tested nitrate concentrations except at 0.5 mM which was 31.4 percent higher compared to 1.0 mM nitrate. At 5.0 mM sodium nitrate, by using 20 g L-1 of glucose in mixotrophic culture of D. viridis,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dunaliella viridis; Mixotrophic culture; Biofuel; Biomass; Lipid content; Hormones. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100201 131I-induced changes in rat thyroid gland function BJMBR Torlak,V.; Zemunik,T.; Modun,D.; Capkun,V.; Pesutic-Pisac,V.; Markotic,A.; Pavela-Vrancic,M.; Stanicic,A.. Therapeutic doses of 131I administered to thyrotoxic patients may cause thyroid failure. The present study used a rat model to determine thyroid function after the administration of different doses of 131I (64-277 µCi). Thirty male Fisher rats in the experimental group and 30 in the control group (untreated) were followed for 6 months. The animals were 4 months old at the beginning of the experiment and were sacrificed at an age of 9 months. Hormone concentration was determined before 131I administration (4-month-old animals) and three times following 131I administration, when the animals were 7, 8, and 9 months old. The thyroid glands were removed and weighed, their volume was determined and histopathological examination was performed at the end of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Thyroid gland; 131I; Hormones; Histopathology; T3; T4; TSH. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000800009 Gap junction modulation by extracellular signaling molecules: the thymus model BJMBR Alves,L.A.; Nihei,O.K.; Fonseca,P.C.; Campos-de-Carvalho,A.C.; Savino,W.. Gap junctions are intercellular channels which connect adjacent cells and allow direct exchange of molecules of low molecular weight between them. Such a communication has been described as fundamental in many systems due to its importance in coordination, proliferation and differentiation. Recently, it has been shown that gap junctional intercellular communication (GJIC) can be modulated by several extracellular soluble factors such as classical hormones, neurotransmitters, interleukins, growth factors and some paracrine substances. Herein, we discuss some aspects of the general modulation of GJIC by extracellular messenger molecules and more particularly the regulation of such communication in the thymus gland. Additionally, we discuss recent data... Tipo: Info:eu-repo/semantics/article Palavras-chave: Thymus; Thymic epithelial cells; Connexin 43; Hormones; Interleukins. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000400012 Reproductive physiology of mango Braz. J. Plant Physiol. Davenport,Thomas L.. Mango flowering involves hormonal regulation of shoot initiation and induction events resulting in reproductive shoot formation. A balance or ratio of endogenously regulated phytohormones, thought to be auxin from leaves and cytokinins from roots, appears to govern the initiation cycle independently from inductive influences. Induction of reproductive or vegetative shoots is thought to be governed by the ratio of a temperature-regulated florigenic promoter and an age regulated vegetative promoter at the time of shoot initiation. Management of off-season flowering in mango trees is being accomplished in the tropics by successfully synchronizing shoot initiation through tip pruning and use of nitrate sprays coupled with management of the stem age to induce... Tipo: Info:eu-repo/semantics/article Palavras-chave: Auxin; Cytokinin; Flowering management; Fruiting; Hormones; Mangifera indica. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400007 Utility of basic research in plant/crop physiology in relation to crop improvement: a review and a personal account Braz. J. Plant Physiol. El-Sharkawy,Mabrouk A.. Agricultural research and development plays an essential role in a nation's economic development, providing for food security for an ever-increasing population. In developed countries, the gap between potential and actual yield is largely closed because of a combination of advanced technologies, high-yielding new varieties and the application of agrochemicals in highly mechanized production systems. In most of these countries, agricultural production exceeds national demand, resulting in excess products for export. In many of the developing countries, however, agricultural productivity is still far below what it should be because of multiple technical and socio-economic constraints. Food deficits are the norm in poor and middle-income countries, requiring... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agriculture; Breeding; C4-photosynthesis; Drought-tolerance; Ecophysiology; Ecosystems; Hormones; Photoperiod; Productivity; Soil; Water stress. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000400001 Caracterización de las condiciones para la micropropagación de Polianthes tuberosa L. a partir de cormo, hoja, flor y yema. Colegio de Postgraduados Hernández Mendoza, Fanny. Debido a las tecnologías con que se cuenta en la actualidad es relativamente fácil incrementar la biodiversidad y se considera que dos grupos de técnicas son indispensables para aumentar la variabilidad genética de los cultivos. Las técnicas empleadas para la inducción de mutaciones son las herramientas útiles para incrementar la variabilidad genética y las técnicas de cultivo in vitro permiten la multiplicación rápida de los fenotipos seleccionados. El nardo (Polianthes tuberosa L.) es una planta endémica de México, la importancia de este cultivo radica en que es utilizada como flor de corte así como en la industria farmacéutica y del perfume. Es peculiar que presenta poca variabilidad genética, porque es propagada vegetativamente. En este estudio se... Palavras-chave: Propagación; Regeneración de plantas; Medio de cultivo; Hormonas; Eficiencia de la regeneración; Contaminación; Regeneration of plantlets; Culture media; Hormones; Contamination; Genética; Maestría; Regeneration efficiency. Ano: 2013 URL: http://hdl.handle.net/10521/2108 Caracterización de las condiciones para la micropropagación de Polianthes tuberosa L. a partir de cormo, hoja, flor y yema. Colegio de Postgraduados Hernández Mendoza, Fanny. Debido a las tecnologías con que se cuenta en la actualidad es relativamente fácil incrementar la biodiversidad y se considera que dos grupos de técnicas son indispensables para aumentar la variabilidad genética de los cultivos. Las técnicas empleadas para la inducción de mutaciones son las herramientas útiles para incrementar la variabilidad genética y las técnicas de cultivo in vitro permiten la multiplicación rápida de los fenotipos seleccionados. El nardo (Polianthes tuberosa L.) es una planta endémica de México, la importancia de este cultivo radica en que es utilizada como flor de corte así como en la industria farmacéutica y del perfume. Es peculiar que presenta poca variabilidad genética, porque es propagada vegetativamente. En este estudio se... Palavras-chave: Propagación; Regeneración de plantas; Medio de cultivo; Hormonas; Eficiencia de la regeneración; Contaminación; Regeneration of plantlets; Culture media; Hormones; Regeneration efficiency; Contamination; Genética; Maestría. Ano: 2013 URL: http://hdl.handle.net/10521/2331 Enraizamento de híbridos interespecíficos de maracujá utilizando regulador de crescimento AIB (ácido indol-butírico) (2009). Infoteca-e LIMA, C. A. de; JUNQUEIRA, N. T. V.; PEIXOTO, J. R.; SOUZA, L. S.; BELLON, G.; JUNQUEIRA, K. P.; SANTOS, E. C. dos; CASTELO BRANCO, M. T.. Tipo: Folders Palavras-chave: Maracujá; Passiflora; Hormones; Passion fruits; Rooting; Varieties. Ano: 2009 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/737111 Indução de raízes laterais em pivotante de muda "palito" de seringueira pelo 2,4-D associado ao Thiabendazol. Infoteca-e MORAES, V. H. F.. Considerando a conveniencia de indicar sucedaneos de mais facil aquisicao e tambem de custo mais baixo do que AIB, foi realizado um ensaio no qual foi testada a hipotese de que 2,4-D estimularia a formacao de raizes laterais e deixaria de ser letal se fosse inibida a producao de etileno no tecido da planta, em resposta a essa auxina, pela adicao deThiabendazol. Com tres semanas apos o plantio, nos dois tratamentos de 2,4-D sem Thiabendazol, houve morte total das plantas, nao tendo havido diferenca entre taxas de pegamento das mudas tratadas com 2,4-D + Thiabendazol e dos outros tratamentos. Caso seja confirmada a ausencia de risco de danos a seringueira com o emprego de 2,4-D associado ao Thiabendazol na inducao de raizes laterais, alem de pronta... Tipo: Folhetos Palavras-chave: Toco alto; Brasil; Amazonas; Rubber tree; Species; Cuttings; Enraizamento; Espécie; Indução; Hevea; Hormônio; Raiz; Seringueira; Hormones; Stumps; Roots. Ano: 1982 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/665322 Produção de mudas de pimenta-longa por meio de estaquia com diferentes concentrações de hormônio e desinfestantes. Infoteca-e NEGREIROS, J. R. da S.; AZEVEDO, J. M. A. de; RONCATTO, G.; BASTOS, R. M.. O objetivo deste trabalho foi avaliar a produção de mudas por estaquia de plantas de pimenta-longa em diferentes concentrações de hormônio e desinfestantes. Tipo: Folhetos Palavras-chave: Embrapa Acre; Rio Branco (AC); Acre; Amazonia Occidental; Western Amazon; Amazônia Ocidental; Estaquillas; Desinfestación; Ácido indol butírico; Producción de plántulas; Propagación vegetativa; Hormonas; Propagação vegetativa; Hormônio vegetal; Ácido indolbutírico; Desinfestação; Estaca; Produção; Muda; Piper hispidinervum; Pimenta longa; Disinfestation; Piper longum; Hormones; Vegetative propagation; Plant cuttings; Seedling production; Indole butyric acid. Ano: 2012 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/951814 Protocolos Embrapa para superovulação de cabras e ovelhas. Infoteca-e FONSECA, J. F. da; OLIVEIRA, M. E. F.. Tipo: Folhetos Palavras-chave: SOV; Superovulated females; FSH; Caprino; Ovino; Superovulação; Reprodução Animal; Ciclo Estral; Hormônio; Goats; Sheep; Small ruminants; Superovulation; Hormones. Ano: 2020 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1128193 Uso da hCG na indução hormonal da ovulação em cabras. Infoteca-e GONZALEZ, C. I. M.; MACHADO, R.; SIMPLÍCIO, A. A.; CUNHA, M. das G. G.. Tipo: Folhetos Palavras-chave: Brasil; Nordeste; Northeast; Caprino; Ovulação; Cabra; Indução; Hormônio animal; Goats; Ovulation; Hormones; Brazil. Ano: 1991 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/514953 Hormônios no diagnóstico de problemas reprodutivos. Infoteca-e ELOY, A. M. X.. O proposito deste trabalho e fornecer maiores esclarecimentos sobre o aspecto pratico das analises hormonais em medicina veterinaria. Tipo: Folhetos Palavras-chave: Hormônio animal; Reprodução animal; Endocrinologia; Caprino; Ovino; Hormones; Endocrinology; Reproduction; Sheep; Goats. Ano: 1990 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/514290 Registros recuperados: 41 Primeira ... 1 2 3 ... Última

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