|
|
|
| Registros recuperados: 39 | |
|
|
| Pereira,Francisco Elder Carlos Bezerra; Martins,Cibele Chalita; Jeromini,Tatiane Sanches; Gomes-Junior,Francisco Guilhien; Torres,Salvador Barros. |
| ABSTRACT Identifying fast and efficient tests to evaluate the vigor of forage grass seed lots is desirable in the quality control programs of the companies in this sector. Thus, the objective was to evaluate the efficiency of vigor tests on the physiological quality of seeds of Panicum maximum, cv. Mombasa, for the differentiation of lots and prediction of seedling emergence in the field. Nineteen seed lots were subjected to evaluations of moisture content, germination, first count, germination speed index, seedling emergence in sand, first count of seedling emergence in sand, seedling root and shoot lengths, seedling emergence in the field and computerized analysis of seedling images obtained through SVIS® software. The experimental design was completely... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Panicum maximum; SVIS®; Principal component; Vigor; Image analysis. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100407 |
| |
|
|
| Oliveira,Fabrícia Nascimento de; França,Francisco Diorge de; Torres,Salvador Barros; Nogueira,Narjara Walessa; Freitas,Rômulo Magno Oliveira de. |
| RESUMO O pereiro-vermelho é uma espécie florestal pertencente à família Rubiaceae, considerada endêmica do bioma Caatinga. O presente trabalho teve como objetivo definir o tipo de substrato e a temperatura mais adequados para a germinação de sementes de pereiro-vermelho (Simira gardneriana M.R. Barbosa & Peixoto). Dessa forma, realizou-se experimento em delineamento inteiramente ao acaso e arranjo fatorial 5 x 4, constituídos pelas combinações de cinco substratos (entre areia, sobre areia, rolo de papel, sobre papel e sobre vermiculita) e quatro temperaturas (constantes de 25; 30; 35 °C e alternada de 20-30 °C), com quatro repetições de 25 sementes cada. Foram analisadas as seguintes variáveis: porcentagem de germinação, porcentagem de plântulas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rubiaceae; Caatinga; Análise de sementes; Sementes florestais. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000400658 |
| |
|
|
| 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 |
| |
|
|
| Leal,Caio César Pereira; Dantas,Nadjamara Bandeira de Lima; Torres,Salvador Barros; Vale,Amsterdam Armênio de Medeiros; Freitas,Rômulo Magno Oliveira de. |
| ABSTRACT This study aimed to evaluate the tolerance of C. leprosum seedlings to salt stress during the emergence and early seedling development. The experiment was carried out between the months of August and September, in a greenhouse, and the substrate used was the commercial coconut fiber wetted with aqueous solutions of sodium chloride (NaCl), calcium chloride (CaCl2) and potassium chloride (KCl) with the electrical conductivities of 0.0, 1.5, 2.5, 3.5, 4.5, 5.5 and 6.5 dS m-1. We used a completely randomized design in a 3 x 7 factorial scheme (three salts x seven levels of electrical conductivity). We evaluated seedling emergence, emergence speed index, root length, shoot length, dry matter of roots and shoots. The results indicated significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Combretaceae; Salinity; Forest seeds. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200300 |
| |
|
|
| Medeiros,Marcelo Gurgel; Silva Neto,José Sisenando de Sênna; Oliveira,Giordanio Bruno Silva; Torres,Salvador Barros; Silveira,Lindomar Maria da. |
| ABSTRACT Maturation of seeds involves a systematic sequence of physical and physiological alterations observed from fecundation until they become independent of the mother plant. These alterations comprehend a set of steps which prepare them for a successful germination in the future, characterized by the synthesis and accumulation of reserves. Thus, the objective was to evaluate the development and physiological quality of seeds of L. cylindrica accessions during maturation. Fruits of L. cylindrica accessions were harvested from the 10th day after anthesis (DAA) until the 50th DAA, at 10-day intervals. In each harvest, fruit fresh weight was determined, and then the seeds were manually extracted and subjected to the following evaluations: 100-seed weight,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucurbitaceae; Loofah; Plant genetic resources; Physiological quality. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100076 |
| |
|
|
| Costa,Ewerton Marinho; Torres,Salvador Barros; Ferreira,Roberta Rocha; Silva,Flávia Gomes da; Araujo,Elton Lucio. |
| RESUMO O controle da mosca minadora é imprescindível nas áreas de produção de melão dos estados do Rio Grande do Norte e Ceará. Portanto, o objetivo do trabalho foi avaliar o efeito de diferentes concentrações do extrato aquoso de sementes de nim (Azadirachta indica) sobre a mosca minadora (Liriomyza sativae). O experimento foi conduzido em delineamento inteiramente casualizado, constituído por sete tratamentos: Testemunha absoluta (água destilada), testemunha positiva (inseticida Vertimec® 18 CE - Abamectina) e cinco concentrações do extrato aquoso de sementes de nim (1; 5; 10; 15 e 20 g 100 mL-1 de água destilada), com 10 repetições (plantas de meloeiro). Os tratamentos foram aplicados via pulverização, com auxílio de um pulverizador manual. As... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; Mosca minadora; Inseto-praga; Azadirachta indica; Manejo integrado de pragas. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200401 |
| |
|
|
| Almeida,João Paulo Nobre de; Paiva,Emanoela Pereira de; Torres,Salvador Barros; Sá,Francisco Vanies da Silva; Leite,Moadir de Sousa. |
| ABSTRACT Information on the effects of climate conditions on the survival of species grown in semi-arid regions is essential and at the same time scarce, especially regarding rustic species such as West Indian gherkin (Cucumis anguria L.). Thus, this study aimed to evaluate germination, growth and biochemical alterations in C. anguria seeds under water stress and different temperature regimes. The experimental design was completely randomized, in 5 x 5 factorial scheme, composed of five osmotic potentials (0.0; -0.1; -0.2; -0.3 and -0.4 MPa) and four temperatures (20; 25; 30 °C and alternating temperatures of 20-30 ºC), with each treatment composed of four replicates of 50 seeds. The seeds were sown on paper towel (Germitest®) and germinated in Biochemical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis anguria; Cucurbitaceae; Water deficit; Vigor. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300411 |
| |
|
|
| 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 |
| |
|
|
| Sarmento,Erivanessa Costa Sousa; Pereira,Kleane Targino Oliveira; Oliveira,Fernando Sarmento de; Leal,Caio César Pereira; Torres,Salvador Barros; Dutra,Alek Sandro. |
| ABSTRACT The objective was to evaluate the physical characteristics and physiological behavior of A. oleracea seeds during imbibition and germination, under different temperatures and photoperiods, as well as to determine the duration of the germination test. For this, biometric parameters (length, width and thickness) were measured in 100 seeds and thousand-seed weight was determined. In addition, the external structures of seeds and seedlings were described and the imbibition curve was monitored. Subsequently, the germination test was conducted at temperatures of 20, 25, 30, 35, 20-30 and 25-35 ºC, under constant and alternating light and dark photoperiods (12 h), arranged in 6 x 3 factorial scheme, with four replicates of 50 seeds. Seeds were sown in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asteraceae; Jambu; Imbibition; Seed morphology; Seed analysis. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000400660 |
| |
|
|
| Souza,Maria Williane de Lima; Oliveira,Francisco de Assis de; Torres,Salvador Barros; Souza Neta,Maria Lilia de; Sá,Francisco Vanies da Silva; Leal,Caio César Pereira. |
| ABSTRACT The physiological potential of seeds is one of the main factors that should be considered at the planting of a crop. This study aimed to evaluate the exogenous application of biostimulant in zucchini, cv. Caserta Italiana, under salt stress conditions. For this, the experiment was divided into two parts. The first one was carried out in the laboratory, using a completely randomized experimental design, in a 5 x 3 factorial scheme (biostimulant doses and seed soaking times), with four replicates of 25 seeds. The second one was carried out in a greenhouse, in a completely randomized experimental design, in a 2 x 6 factorial scheme with four replicates, corresponding to two levels of irrigation water salinity (0.5 and 5.0 dS m-1) and six forms of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucurbitaceae; Bioregulator; Seed treatment; Salinity. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000300413 |
| |
|
|
| Santiago,Willen Ramos; Gama,Juliana Simões Nobre; Torres,Salvador Barros; Bacchetta,Gianluigi. |
| ABSTRACT Determination of seed physiological maturity allows predicting the most appropriate time for harvest, aiming to obtain seeds with high physiological potential. Physalis angulata (Solanaceae) has pharmacological and agro-industrial potential, but there is little information on its reproductive phenology. Thus, this study aimed to evaluate the physiological maturity of P. angulata seeds according to fruit age. Fruits were harvested at 7, 14, 21, 28 and 35 days after anthesis (DAA) and the following evaluations were conducted: fruit weight and diameter, seed moisture content, 100-seed dry weight, 1000-seed weight, electrical conductivity, germination, germination first count, emergence, and seedling dry weight and length. The experimental design was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanaceae; Anthesis; Harvest; Germination; Physiological potential. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300431 |
| |
|
|
| Leal,Caio César Pereira; Torres,Salvador Barros; Dantas,Nadjamara Bandeira de Lima; Aquino,Gutierres Silva Medeiros; Alves,Tatianne Raianne Costa. |
| ABSTRACT Combretum leprosum Mart., commonly known as ‘mofumbo’, is used for medicinal purposes, recovery of degraded areas and apiculture. The objective of this study was to evaluate the effect of water stress on the germination and vigor of C. leprosum seeds as function of different temperatures. To compose the treatments, the substrate used was paper roll moistened with polyethylene glycol solutions (PEG 6000), at the following levels of osmotic potential: 0.0; -0.1; -0.2; -0.2; -0.4; and -0.5 MPa, and placed in chamber at constant temperatures of 25, 30 and 35 and alternating temperature of 20-30 °C, forming a 6 x 4 factorial. The seeds were submitted to the following evaluations: germination percentage, germination speed index, root length, shoot... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Combretaceae; Osmotic potential; Abiotic stress. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100413 |
| |
|
|
| Torres,Salvador Barros; Minami,Keigo. |
| O objetivo deste trabalho foi avaliar a eficácia de diferentes métodos para a determinação da qualidade fisiológica de sementes de pimentão (Capsicum annuum L.), cv. All Big, procurando obter informações que possam indicar opções de utilização nos programas de controle de qualidade, bem como tornar possível, através de testes de laboratório, a identificação do potencial de emergência das plântulas em campo. Para tanto, foram avaliadas sementes de quatro lotes, pelos testes de germinação, primeira contagem de germinação, condutividade elétrica após quatro e 24 horas, envelhecimento acelerado, frio em rolo de papel sem solo, emergência das plântulas em campo e grau de umidade. Os resultados indicaram que os testes de primeira contagem de germinação,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum; Germinação; Vigor. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000100018 |
| |
|
|
| Rodo,Angelica Brod; Perleberg,Cleiton Stigger; Torres,Salvador Barros; Gentil,Daniel Felipe de Oliveira; Tessarioli Neto,João. |
| A maturação de sementes de cenoura ocorre escalonadamente nas umbelas de diferentes ordens e, sendo a colheita realizada em uma única etapa, pode ocorrer desuniformidade de tamanho, dentro de um mesmo lote de sementes. Desta forma, este trabalho foi realizado visando determinar o efeito do tamanho da semente na sua qualidade fisiológica. Quatro lotes de sementes comerciais de cenoura cv. Brasília, provenientes da região de Bagé-RS, foram separados em três frações: grande (retenção em peneira de perfuração redonda 2 mm); média (retenção em peneira de perfuração redonda 1,5 mm) e a mistura entre grande e média (em porções iguais). Foram conduzidos os seguintes testes: germinação, tetrazólio, condutividade elétrica, envelhecimento acelerado e emergência de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Daucus carota; Semente; Vigor; Germinação. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000100031 |
| |
|
|
| Torres,Salvador Barros; Marcos Filho,Julio. |
| Accelerated aging is one of the most useful tests used for the evaluation of seed vigor but it is seldomly used to test melon (Cucumis melo L.) seeds. The objective this research was to compare different procedures of the accelerated aging test to evaluate the physiological quality of melon seeds and the efficiency of using saturated salt solution for the control of water uptake by seeds. Five seed lots each of the hybrids AF-646 and AF-682 were tested for germination, seedling emergence, traditional accelerated aging (periods 0f 48, 72 and 96 hours, at 38 or 41°C) and salt saturated accelerated aging. The accelerated aging test (traditional procedure and with salt solution) for 72h and 96h, at 38 or 41°C was sensitive to detect differences in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; Physiological quality; Vigor. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100012 |
| |
|
| |
|
|
| Torres,Salvador Barros; Silva,Francisca Gleiciane da; Gomes,Maryjane Diniz de Araújo; Benedito,Clarisse Pereira; Pereira,Francisco Elder Carlos Bezerra; Silva,Edvan Costa da. |
| Os testes de germinação e de vigor são componentes essenciais do processo de controle de qualidade das empresas produtoras de sementes, e o teste de envelhecimento acelerado é um dos mais utilizados para avaliação do vigor de sementes. Nesse sentido, a pesquisa teve como objetivo estudar a metodologia do teste de envelhecimento acelerado, visando à identificação de diferentes níveis de vigor de lotes de sementes de quiabo (Abelmoschus esculentus (L.) Moench). Para isso, quatro lotes de sementes da cultivar 'Colhe Bem' e cinco lotes da cultivar 'Santa Cruz 47' foram submetidos às seguintes avaliações: germinação, emergência de plântulas, envelhecimento acelerado tradicional e em solução saturada com NaCl (38 e 41ºC durante 24, 48, 72 e 96 horas) e grau de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abelmoschus esculentus Malvaceae vigor; Potencial fisiológico.. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001202103 |
| |
|
|
| Torres,Salvador Barros. |
| Com o objetivo de estudar a eficiência do teste de estresse hídrico na avaliação da qualidade fisiológica de sementes de sorgo (Sorghum bicolor (L.) Moench), seis lotes de sementes básicas da cultivar IPA-1011, safra 1995, foram analisados pêlos testes de germinação, primeira contagem, de frio sem solo, envelhecimento acelerado, condutividade elétrica, emergência em campo e comprimento das plântulas sob estresse hídrico nos potenciais de 0, -0,3. -0,6 e -0,9 MPa. Os trabalhos foram realizados no Laboratório de Análise de Sementes e no campo experimental da EMBRAPA-CPATSA, em Petrolina, PE. As determinações foram conduzidas com quatro repetições em delineamento experimental inteiramente casualizado. Os resultados indicaram que o teste de germinação sob... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sorghum bicolor (L.) Moench; Polietileno glicol; Teste de vigor. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781997000100006 |
| |
|
| |
| Registros recuperados: 39 | |
|
|
|
