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| Registros recuperados: 83 | |
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| Maia,Fernanda Costa; Maia,Manoel De Souza; Bekker,Renée M.; Berton,Rogério Previatti; Caetano,Leandro Sebastião. |
| The interest was the seed longevity dynamics of annual ryegrass in natural conditions as an important tool to explain its dynamics in no tillage systems used in the South of Brazil. The species is commonly managed for natural re-sowing and, in this way, allows cattle grazing with reduced costs during the winter time. In February of 2003, twenty bags of nylon screen containing sterilised soil with 100 seeds in each were randomly buried in the field, 5 cm deep. Around every three or four months, four sacks were exhumed. Seeds were counted and tested using germination and tetrazolium tests.The seeds showed high primary dormancy, which was overcome very fast. After 108, 226, 326, 565 and 732 days of burial there were no significant differences as the secondary... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Annual ryegrass; Persistence; Viability; Dormancy; Buried seeds. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222009000200014 |
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| Pozitano,Marina; Usberti,Roberto. |
| An interspecific hybrid resulting from the crossing of elephant grass (Pennisetum purpureum Schumach) x pearl millet (Pennisetum glaucum (L.) R. Brown) has been developed. This hybrid, however, revealed low phenotypic uniformity and low production of pure seeds. Through recurrent selection, two improved populations were obtained (genotypes Corte and Pastoreio). The aim of this study was assessing seed quality of the three hybrids (genotypes Corte, Pastoreio and Paraiso) by tests of: seed purity; seed germination; accelerated aging test, at 42 ºC; 1,000 seeds weight; drying curves; and sorption and desorption isotherms. Recurrent selection altered the seed size and increased initial quality of population for genotype Pastoreio. Drying curves for the three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pennisetum purpureum; Pennisetum glaucum; Drying; Viability. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300004 |
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| Ávila,Marizangela Rizzatti; Braccini,Alessandro de Lucca e; Souza,Cristina Giatti Marques de; Mandarino,José Marcos Gontijo; Bazo,Gabriel Loli; Cabral,Yara Camila Fabrin. |
| The objective of this study was to evaluate physiological quality, content, and activity of antioxidants, in soybean seeds subjected to accelerated aging during different periods. Seeds of cultivars BRS 258, BRS 262 and BRS 268, subjected to accelerated aging during 12, 24, 36 and 48 hours and non-aged seeds were used. After each aging period, the seed were evaluated by tests of: germination; first count and tetrazolium. The total of phenolic compounds, total flavonoides, total of isoflavones, and activity for eliminating ABTS●+ radicals were quantified. There were differences among cultivars according to vigor and viability only after seeds were aged. Cultivars BRS 158 and BRS 268 have shown better seed physiological quality in each aging period; however,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isoflavones; Glycine max; Phenolic compounds; Viability; Vigor. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300006 |
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| Reis,Renata Conduru Ribeiro; Dantas,Bárbara França; Castro,Renato Delmondez de; Antunes,Cimille Gabrielle Cardoso; Silva,Fabrício Francisco Santos da; Pelacani,Claudinéia Regina. |
| Gliricidia sepium is a drought-tolerant species, easily multiplied by seeds, and has been exploited by farmers as a source of forage in the semi-arid region of northeast Brazil. The objective of the present study was to evaluate the effect of seed storage on the mobilization of reserves during imbibition of "Gliricidia" seeds. Freshly-harvested seeds were packed in kraft paper bags and stored for three and six months in the laboratory under ambient conditions (25 º C ± 3 T and 75% ± 3 RH). Cotyledons were isolated from imbibed seeds and macerated for the extraction and quantification of total soluble sugars, reducing sugars, sucrose and starch, as well as of proteins, amino acids and for amylase activity. Storage under these conditions resulted in an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macromolecules; Longevity; Viability; Germination; Water content. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222011000300018 |
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| Gallina,Darlila Aparecida; Barbosa,Paula de Paula Menezes; Ormenese,Rita de Cássia Salvucci Celeste; Garcia,Aline de Oliveira. |
| ABSTRACT Dairy products are the primary delivery for probiotics, with great popularity among the public looking for functional foods. The addition of probiotics to new food matrices requires studies about the stability and viability of these microorganisms in the final product. This study aimed to develop a probiotic smoothie beverage and to evaluate the microbiological quality, pH, acidity, syneresis, probiotics viability, sensory acceptance, and consumers’ preference. For that, thirty-six beverage formulations were prepared using yogurt and different fruit pulps. Six formulations were selected for the study, as follows: probiotic yogurt with the addition of mango pulp, grape, red fruits (containing 8 and 10% sucrose), mango/passion fruit, and red... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yogurt; Bifidobacteria; Viability; Acceptance; Fruit Pulp. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300378 |
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| Pereira,Kleane Targino Oliveira; Paiva,Emanoela Pereira de; Souza Neta,Maria Lilia de; Benedito,Clarisse Pereira; Torres,Salvador Barros. |
| ABSTRACT The tetrazolium test is one of the promising alternatives to determine the viability of dormant, recalcitrant and slow-germinating seeds. The objective of this study was to adapt the tetrazolium test methodology to estimate the viability and vigor of Piptadenia stipulacea (Benth.) Ducke seeds. For this, a sample of seeds was classified into three sublots using round sieves, corresponding to six, five and four millimeters in diameter, respectively. Moisture content, imbibition curve, germination, emergence, germination and emergence speed indices, mean germination time and seedling emergence were initially evaluated. The second stage was conducted using a completely randomized experimental design, in 3 x 9 factorial scheme, corresponding to three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fabaceae; Biochemical test; Viability; Forestry species; Triphenyl formazan. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100419 |
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| Lima,Denise de Castro; Dutra,Alek Sandro; Pontes,Felipe Moura; Bezerra,Francisco Thiago Coelho. |
| The sunflower is among the top five crops in the world for the production of edible vegetable oil. The species displays rustic behavior, with an excellent edaphic and climatic adaptability index, being able to be cultivated throughout Brazil. Seed quality is the key to increasing production and productivity in the sunflower. The objective of this work was to monitor the viability of sunflower seeds with a view to their conservation when stored in different environments and packaging. The seeds were packed in paper bags, multilayered paper, black polyethylene and PET bottles; and stored for a period of twelve months in the following environments: dry cold room (10 ºC and 55% RH), the ambient conditions of Fortaleza, Ceará, Brazil (30-32 ºC and 75% RH),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helianthus annus L.; Packaging; Viability. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200018 |
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| Paiva,Emanoela Pereira de; Torres,Salvador Barros; Almeida,João Paulo Nobre de; Sá,Francisco Vanies da Silva; Oliveira,Renata Ramayane Torquato. |
| ABSTRACT The tetrazolium test is a quick and effective method for evaluating viability in seeds. The aim of this study was to determine a methodology for using the tetrazolium test, and its efficiency in verifying viability in seeds of the gherkin (Cucumis anguria L.). Consequently, five batches of gherkin seed were initially evaluated by the tests for germination, first count and speed of germination. The batches were then subjected to treatments in order to adjust the methodology for the tetrazolium test, evaluating three concentrations of tetrazolium solution (0.100, 0.075 and 0.050%), kept in the dark for two, four and six hours, under temperatures of 35 °C and 40 °C, with four replications of 25 seeds per treatment. At the end of the staining period,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis anguria; Viability; Vigour; Quick test. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100118 |
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| Hernández,P.J.E; Fernández,R.F; Rodríguez,S.J.L; Soto,M.Y.G; Verona,J.E.H; García,R.A.D. |
| In order to evaluate the post-thaw effect on acrosomal viability and reaction of sperm collected from equine epididymis tail, 62 testes were collected and transported at 4°C. Epididymis was dissected to perform the retrograde flushing of the epididymis tail , using 10 mL of a diluent based on skim milk (INRA 82). The diluent obtained with the spermatic content was recovered in graduated collecting tubes and 1mL of each sample was taken to be evaluated. For evaluations, the samples having a minimum of 30% of progressive motility were selected. The evaluations were on: percentage of live sperm, normal morphology, sperm concentration, percentage of live sperm without acrosomal reaction (VsRA) and live with acrosomal reaction (VcRA), evaluating this indicator... |
| Tipo: Journal article |
Palavras-chave: Cryopreservation; Viability; Acrosomal reaction; FITC-PNA/IP; Sperm; Epididymis; Equine. |
| Ano: 2012 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2012000200004 |
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| Hernández,P.J.E; Fernández,R.F; Rodríguez,S.J.L; Juárez,R.E; Soto,M.Y.G; García,R.A.D. |
| In the present research, the effects of cryopreservation on the viability and acrosomal status of sheep sperms were analyzed. Forty five ejaculates were obtained by the artificial vagina method for analysis, evaluating in fresh semen the following characteristics: volume (Vol), progressive motility (PM), viability percentage (Viab), normal morphology (NM), spermatic concentration (Concentr); as well as its viability and acrosomal status, The last two parameters were evaluated staining with fluorescein isothiocyanate conjugated with Arachis hypogaea lectin and propidium iodide (FITC-PNA/IP), in which there were different patterns of staining: live sperms without acrosomal reaction (VsRA), live with acrosomal reaction (VcRA), dead without acrosomal reaction... |
| Tipo: Journal article |
Palavras-chave: Cryopreservation; Viability; Acrosomal reaction; FITC-PNA/IP; Sheep semen. |
| Ano: 2012 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2012000200003 |
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| Ganho,Norma G.; Marinoni,Renato C.. |
| Epilachna paenulata (Germar, 1824) was reared feeding on pumpkin leaves (Cucurbita pepo Lourt.) in laboratory conditions at temperatures of 20±0,5ºC, relative humidity of 65±0,5% and 12 hour photoperiod. Groups of fecunded and non-fecunded females were studied. The ovarioles showed four developing stages during egg production, morphologically alike for fecunded and non-fecunded females, but differing in the duration time of the stages. Each ovarium has 24 ovarioles on average, less than any other species known into the genus, and all ovarioles are physiologically active at each oviposition. The mean number of ovarioles is lower when compared with the other species of Epilachninae known. Fecunded and non-fecunded females showed a similar preoviposition... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epilachninae; Reproduction; Ovariole development; Mate influence; Viability. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000200015 |
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| Ortiz, Thiago Alberto; Moritz, Aline; Oliveira, Mariana Alves de; Takahashi, Lúcia Sadayo Assari. |
| The objective of the present study was to evaluate pitaya seed germination under different hydrogen potentials, with or without fungicide treatment. A completely randomized design was employed under a 3 x 13 x 2 factorial scheme, corresponding to three pitaya species (white pitaya, pitaya hybrid I, pitaya hybrid II), thirteen hydrogen potentials (3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, and 9.0) and two fungicide conditions (presence and absence), with four replications. The percentage of germination, germination speed index and mean germination time were evaluated. The data were subjected to ANOVA, and the means were compared using the Scott-Knott test (p < 0.05). The pH influenced the germination speed index in white pitaya. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hylocereus undatus H; Costaricensis; Carboxim+thiran; Vigor; Viability; Physiological quality Tecnologia e produção de sementes. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18088 |
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| Sales, Juliana de Fátima; Instituto Federal Goiano; Pinto, José Eduardo Brasil Pereira; Universidade Federal de Lavras; Oliveira, João Almir de; Universidade Federal de Lavras; Botrel, Priscila Pereira; Universidade Federal de Lavras; Silva, Fabiano Guimarães; Instituto Federal Goiano; Corrêa, Ricardo Monteiro; Instituto Federal Minas Gerais. |
| This study evaluated the effect of light, temperature, physiologic stage at harvest and length of time on the germination of Hyptis marrubioides seeds. Two trials were conducted. The first experiment was performed immediately after the seed harvest and consisted of a 2 x 3 x 3 factorial design with 2 environmental conditions (light and dark), 3 temperatures (20, 30 and 20/30ºC) and 3 seed harvest times (green colored seeds, light brown seeds and dark brown seeds). The second experiment was conducted in the presence of light at a temperature of 30ºC and consisted of a 4 x 3 factorial design, with 4 storage times (0, 6, 12 and 18 months) and the 3 three harvest physiologic stages used in the previous experiment. Both of the experiments were conducted in... |
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Palavras-chave: 5.01.03.00-8 medicinal plant; Viability; Lamiaceae Fitotecnia medicinal plant; Viability; Lamiaceae. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4611 |
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| Giurizatto, Maria Izabel Kruger; Iagro; Robaina, Antonio Dias; UFGD; Gonçalves, Manoel Carlos; UFGD; Marchetti, Marlene Estevão; UFGD. |
| A técnica de hidratação controlada de sementes vem sendo utilizada como método de condicionamento fisiológico, tanto para sementes deterioradas como para sementes altamente sensíveis à embebição rápida, ou a interação entre ambas, objetivando melhorar o desempenho destas no campo. A hidratação pode ser seguida por secagem, se as sementes não tiverem atingido a fase III da germinação, facilitando, assim, o subseqüente manuseio, armazenamento e semeadura no campo. O objetivo do presente trabalho foi avaliar os efeitos do hidrocondicionamento na qualidade fisiológica de sementes de soja, sendo estas sementes hidrocondicionadas por períodos de 0, 20 e 24h, secas e armazenadas por 0, 90, 180 e 270 dias em câmara seca, com umidade e temperatura controladas. O... |
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Palavras-chave: 5.01.03.05-9 Melhoramento Vegetal Glycine max; Storage; Viability; Vigor Glycine max; Storage; Viability; Vigor. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5972 |
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| Días,Gabrielen de M. Gomes; Rodrigues,Filipe Almendagna; Soares,J. Dória Rodrigues; Pasqual,Moacir; Carvalho,A. Cristina Portugal- Pinto de. |
| Torch ginger Etlingera elatior (Jack) R.M. Smith is a tropical herb-like, rhizome-like and perennial plant that possesses inflorescences that are both pretty and showy at different colour shades, and have a great visual appeal. Producing seedlings at a high enough level when done conventionally by the division of tussocks, has high costs and phytosanitary problems. The objective of this study was to evaluate the induction of somatic embryogenesis and its potential for subsequent plant regeneration in torch ginger. Rhizomes, leaves and roots from the seedlings grown in vitro were used as explant segments. The different explants were cultured on MS medium supplemented with 30 g L-1 sucrose, and it was solidified with 5.5 g L-1 of agar. The effect of 2.4-D... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zingiberaceae; Etlingera elatior; Viability. |
| Ano: 2014 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952014000200004 |
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| Registros recuperados: 83 | |
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