Consulta: creatorFacets:"Paiva,Emanoela Pereira de"
Registros recuperados: 7
Data/hora: 13/06/2024 00:37:15

Condicionamento fisiológico e vigor de sementes de maxixe
Provedor de dados: 95
Autores: Araújo,Paulo Costa; Torres,Salvador Barros; Benedito,Clarisse Pereira; Paiva,Emanoela Pereira de.
O condicionamento fisiológico é uma técnica para a embebição controlada das sementes que permite a ativação dos processos metabólicos da germinação, evitando a emissão da raiz primária, propiciando uniformização e melhor desempenho das plantas em campo. O objetivo nesta pesquisa foi verificar os efeitos do hidrocondicionamento sobre a germinação e vigor de sementes de maxixe. Para isso, duas cultivares Do Norte e Nordestino, representadas por três lotes, foram hidrocondicionadas em papel toalha, a 20 ºC, até atingirem 33,5% de água (Nordestino) ou 38,1% (Do Norte). Em seguida, parte das sementes foram secadas a temperatura ambiente (28-34 ºC) e umidade relativa do ar de 45-55%, até atingirem teores de água de 7,0 a 8,5%. O potencial fisiológico das...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis anguria L.; Hidrocondicionamento; Vigor.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222011000300011

Teste de condutividade elétrica na avaliação da qualidade fisiológica de sementes de coentro
Provedor de dados: 124
Autores: Torres,Salvador Barros; Paiva,Emanoela Pereira de; Almeida,João Paulo Nobre de; Benedito,Clarisse Pereira; Carvalho,Sara Monaliza Costa.
RESUMOOs testes de germinação e de vigor são componentes essenciais do processo de controle de qualidade das empresas produtoras de sementes. Diante disso, nesta pesquisa o objetivo foi estudar a metodologia do teste de condutividade elétrica, verificando sua eficiência na identificação de diferentes níveis de vigor de lotes de sementes de coentro. Para tanto, utilizaram-se quatro cultivares (Português, Super Verdão, Tabocas e Verdão), cada uma representada por quatro lotes de sementes, que inicialmente foram submetidas às avaliações do grau de umidade, germinação, primeira contagem de germinação e emergência de plântulas. O teste de condutividade elétrica foi realizado com 25 e 50 sementes embebidas em 50 e 75 mL de água destilada, a 25 ºC, por 2, 8 e 24...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coriandrum sativum; Hortaliça; Temperatura; Embebição; Vigor.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000300622

Physiological quality evaluation of Piptadenia stipulacea (Benth.) Ducke seeds by tetrazolium test
Provedor de dados: 124
Autores: 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

Accumulation of salts in the soil and growth of cowpea under salinity and phosphorus fertilization
Provedor de dados: 124
Autores: Lima,Yuri Bezerra de; Sá,Francisco Vanies da Silva; Ferreira Neto,Miguel; Paiva,Emanoela Pereira de; Gheyi,Hans Raj.
ABSTRACT Cowpea is widely grown in the Brazilian semiarid region, however, due to excess salts in the soil and irrigation water constantly low crop productivity has been observed. Accumulation of salts in the soil, growth and biomass partition of cowpea under salt stress and phosphorus fertilization was evaluated in this study. The assay was conducted in a greenhouse in Mossoró, State of Rio Grande do Norte, Brazil, from September to December 2015, using a Alfissol Latosolic with low phosphorus content. The experiment was carried out in a randomized block design in a factorial 5 x 3 arrangement, consisting of five water salinity levels (0.5, 1.5, 2.5, 3.5 and 4.5 dS m-1) and three doses of superphosphate (60, 100 and 140% of the recommended dose for crop -...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Soil fertility; Irrigation; Growth analysis; Saturation extract.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000500765

Germination and biochemical changes in West Indian gherkin seeds under water stress at different temperatures
Provedor de dados: 124
Autores: 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

Tetrazolium test for the viability of gherkin seeds
Provedor de dados: 124
Autores: 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

Dormancy overcoming and germination test in Piptadenia stipulacea (Benth.) Ducke seeds
Provedor de dados: 124
Autores: Benedito,Clarisse Pereira; Ribeiro,Maria Clarete Cardoso; Paiva,Emanoela Pereira de; Medeiros,Hohana Lissa de Sousa.
ABSTRACT Piptadenia stipulacea (Benth.) Ducke presents slow and uneven germination due to integumentary dormancy. In addition, there are no standardized indications as to the temperature and substrate for conducting the germination test in the laboratory. Thus, the objective was to evaluate methods of dormancy overcoming, temperatures and substrates in the germination and vigor of P. stipulacea seeds. For this, two experiments were installed, the first one in a completely randomized design, with 4 replicates of 25 seeds and treatments to overcome dormancy were: immersion in water at 100 °C for 1; 2; 3; 4; 5 and 6 min; immersion in concentrated sulfuric acid (H2SO4 - 98% P.A) for 1; 4; 7; 10 and 13 min; scarification on sandpaper no 80; in the region...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fabaceae; Jurema-branca; Semi-arid region.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200338