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	Provedor de dados Scientia Agricola (1) Rev. bras. sementes (1) Autor Cruz,Eniel David (2) Queiroz,Rafaela Josemara Barbosa (2) Carvalho,Jose Edmar Urano de (1) Carvalho,José Edmar Urano de (1) Palavra-chave Hard seed (2) Amazonian region (1) Emergence speed index (1) Physical dormancy (1) Seeds coat impermeability (1) Tropical species (1) Vigor (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Info:eu-repo/semantics/report (1) Ano 2009 (1) 2007 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Methods for overcoming dormancy in Dinizia excelsa Ducke seeds Rev. bras. sementes Cruz,Eniel David; Queiroz,Rafaela Josemara Barbosa; Carvalho,Jose Edmar Urano de. The impermeability of seed coat to water is common mechanism in Fabaceae seeds. Treatments to overcome hardseededness include scarification with sulphuric acid, scarification on abrasive surface and soaking in water among others. The objective of this study was to identify an effective method to overcome dormancy in Dinizia excelsa seeds. A pre-test (untreated seed) and three experiments were carried out: immersion of seeds in acid sulphuric for 10, 20, 30, 40, 50 and 60min (experiment 1); scarification on abrasive surface at the positions distal end, near of the mycrophyle and on the lateral tissue and tegument clipping at 1mm of the distal end, near of the mycrophyle and on the lateral tissue (experiment 2); scarification on abrasive surface and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Emergence speed index; Hard seed; Vigor. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222009000400018 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 Registros recuperados: 2 Primeira ... 1 ... Última

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