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	Provedor de dados Acta Botanica (5) Boletín de la Sociedad (1) Scientia Agricola (1) Autor Bach,Hernán (1) Baeza,M. Jaime (1) Buisson,Elise (1) Carvalho,José Edmar Urano de (1) Ceccato,Diana (1) Chilo,Gladys (1) Cruz,Eniel David (1) Ferreras,Ana E. (1) Fidelis,Alessandra (1) Fortunato,Renée (1) Funes,Guillermo (1) Galíndez,Guadalupe (1) Han,Yingying (1) Jaganathan,Ganesh K. (1) Liu,Baolin (1) Liu,Wei (1) Magalhães,Camila Ribeiro (1) Malagrina,Gisela (1) Nativel,Naïla (1) Oliveira,Denise Maria Trombert (1) Mais... Palavra-chave Physical dormancy (7) Amazonian region (1) Anatomy (1) Campo rupestre (1) Cerrado (1) Dormancy alleviation (1) Dormancy reversal (1) Fabaceae (1) Hard seed (1) Inter-population variability (1) Intra-population variability (1) Leguminosae (1) Maternal environment (1) Maturation drying (1) Mean germination time (1) Mediterranean Basin (1) Moisture content (1) Mucilaginous stratum (1) Post-fire germination (1) Precipitation gradient (1) Mais... Tipo do documento Info:eu-repo/semantics/other (4) Info:eu-repo/semantics/article (2) Info:eu-repo/semantics/report (1) Ano 2020 (1) 2017 (2) 2016 (2) 2015 (1) 2007 (1) País Brazil (6) Argentina (1) Idioma Inglês (7)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 7 Primeira ... 1 ... Última Scarification with sulphuric acid of Schizolobium amazonicum Huber ex Ducke seeds - FABACEAE Scientia Agricola Cruz,Eniel David; Carvalho,José Edmar Urano de; Queiroz,Rafaela Josemara Barbosa. Seed coat impermeability to water occurs in many species, including Schizolobium amazonicum Huber ex Ducke. To promote germination in seeds with coat impermeability the use of sulphuric acid (H2SO4) is recommended. The objective of this study was to identify a better time for the scarification with sulphuric acid for S. amazonicum seeds. The effect of scarification with sulphuric acid for 20, 40 and 60 min on germination and speed germination was studied for seeds that were either sowed immediately after scarification or after a 24-hour period of immersion in water. Seeds were sown on a mix of sand and sawdust (1:1). The experimental design was completely randomized with four replications of 50 seeds. The statistical analysis of germination was carried out... Tipo: Info:eu-repo/semantics/report Palavras-chave: Tropical species; Amazonian region; Hard seed; Seeds coat impermeability; Physical dormancy. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000300017 Relationship between seed moisture content and acquisition of impermeability in Nelumbo nucifera (Nelumbonaceae) Acta Botanica Jaganathan,Ganesh K.; Song,Danping; Liu,Wei; Han,Yingying; Liu,Baolin. ABSTRACT Seeds of Nelumbo nucifera do not imbibe water, and thus have physical dormancy (PY). However, a proportion of seeds are permeable to water, and so we hypothesized that variation in moisture content is a reason for the development of both permeable and impermeable seeds. The permeable proportion of seeds present in a lot collected from Suzhou, China, was separated using an imbibition test. The permeable proportion had an average moisture content of 15.6 %, compared with 8.5 % for impermeable seeds. Drying permeable seeds above silica gel to 10 % and 8 % f. wb., resulted in 77 and 100 % impermeable seeds, respectively, compared with no impermeable seeds at 15 % moisture content. Dried to 10 % moisture content, and incubated above water in an... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dormancy reversal; Maternal environment; Maturation drying; Moisture content; Physical dormancy. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400639 Inter- and intra-population variability in physical dormancy along a precipitation gradient Acta Botanica Ferreras,Ana E.; Zeballos,Sebastián R.; Funes,Guillermo. ABSTRACT Physical dormancy enables plants that occur in temporally stochastic and harsh environments to survive; thus, within the distribution area of a species, the percentage of seeds with physical dormancy is expected to increase towards more arid and unpredictable areas. There have been no previous studies evaluating both inter and intra-population variability in physical dormancy along a precipitation gradient. The aim of this study was to determine the inter- and intra-population variability in physical dormancy of seeds of Vachellia aroma (Fabaceae) along a precipitation gradient. We collected mature fruits from four localities along a precipitation gradient in central Argentina for an imbibition experiment using controlled germination chambers.... Tipo: Info:eu-repo/semantics/other Palavras-chave: Fabaceae; Inter-population variability; Intra-population variability; Physical dormancy; Precipitation gradient; Vachellia aroma. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100141 The effect of simulated heat-shock and daily temperature fluctuations on seed germination of four species from fire-prone ecosystems Acta Botanica Zupo,Talita; Baeza,M. Jaime; Fidelis,Alessandra. ABSTRACT Seed germination in many species from fire-prone ecosystems may be triggered by heat shock and/or temperature fluctuation, and how species respond to such fire-related cues is important to understand post-fire regeneration strategies. Thus, we tested how heat shock and daily temperature fluctuations affect the germination of four species from fire-prone ecosystems; two from the Cerrado and two from the Mediterranean Basin. Seeds of all four species were subjected to four treatments: Fire (F), temperature fluctuations (TF), fire+temperature fluctuations (F+TF) and control (C). After treatments, seeds were put to germinate for 60 days at 25ºC (dark). Responses differed according to species and native ecosystem. Germination percentage for the Cerrado... Tipo: Info:eu-repo/semantics/other Palavras-chave: Cerrado; Mediterranean Basin; Mean germination time; Physical dormancy; Post-fire germination. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300514 Testa structure in Erythrina speciosa (Leguminosae): the role of the mucilaginous stratum in the acquisition of physical dormancy Acta Botanica Magalhães,Camila Ribeiro; Oliveira,Denise Maria Trombert. ABSTRACT Seeds of Erythrina speciosa (Papilionoideae) exhibit physical dormancy, but evidence has suggested that the proportion of impermeable seeds increases with storage. There are no records of structural variation in the testa of E. speciosa that justifies the difference in the percentage of seeds with physical dormancy. Therefore, the present study investigated the difference in permeability between mature seeds of E. speciosa that were freshly collected and those stored for 12 months. Seeds were examined for changes in testa structure that could result in differences in the percentage of seeds in physical dormancy. Thus, imbibition curves and water gaps were determined, and surface micromorphology, anatomy, and histochemistry of the testa were... Tipo: Info:eu-repo/semantics/other Palavras-chave: Anatomy; Mucilaginous stratum; Physical dormancy; Seed coat; Structure. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000300592 Seed storage-mediated dormancy alleviation in Fabaceae from campo rupestre Acta Botanica Nativel,Naïla; Buisson,Elise; Silveira,Fernando Augusto Oliveira. ABSTRACTWe studied the effects of seed storage on germination and dormancy alleviation in three species of Fabaceae endemic to campo rupestrein southeastern Brazil. Fresh seeds of Collaea cipoensis, Mimosa maguirei and Mimosa foliolosawere set to germinate and germination of seeds after four, five and 13 years of storage was tested. Seed viability was maintained for all species after the full storage period. Seed storage significantly increased germination percentage and decreased germination time for C. cipoensisand M. foliolosa, suggesting the alleviation of physical dormancy with storage. However, we did not find evidence of dormancy alleviation in M. maguirei since stored seeds showed a decrease in germination in comparison to that of fresh seeds. Our... Tipo: Info:eu-repo/semantics/other Palavras-chave: Campo rupestre; Dormancy alleviation; Physical dormancy; Restoration ecology; Seed longevity. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300445 Physical seed dormancy in native legume species of Argentina Boletín de la Sociedad Galíndez,Guadalupe; Ceccato,Diana; Malagrina,Gisela; Pidal,Bárbara; Chilo,Gladys; Bach,Hernán; Fortunato,Renée; Ortega-Baes,Pablo. Leguminosae is a family with high value of use for food, medicine, forage, ornamental and restoration ecology purposes. One obstacle for the use and management of many legume species is the presence of seeds with physical dormancy. Here, we evaluated the presence of physical dormancy in nine native species of Argentina and identified possible methods for breaking dormancy. Caesalpinia gilliesii, Geoffroea decorticans, and Prosopis alpataco have seeds with no physical dormancy, whereas Crotalaria incana, C. pumila, C. stipularia, Desmanthus virgatus, Galactia texana, and Senna aphylla have seeds with physical dormancy. The most effective methods for breaking physical dormancy were mechanical and wet heat (100°C) scarification for Crotalaria spp.;... Tipo: Info:eu-repo/semantics/article Palavras-chave: Leguminosae; Physical dormancy; Scarification; Seed germination. Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722016000100006 Registros recuperados: 7 Primeira ... 1 ... Última

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