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| Ataíde, Glauciana da Mata; Borges, Eduardo Euclydes de Lima; Flores, Andressa Vasconcelos. |
| The electrical conductivity test is a simple and rapid method for evaluating seed vigor. The aim of the present study was to optimize the electrical conductivity test for assessing the vigor of Melanoxylon brauna seeds by investigating the effects of seed number (25, 50, or 75), water volume (25, 50, or 75 mL), and soaking duration (24, 48, or 72 h). The seeds belonged to two lots (I and II) that were collected in 2010 and 2012, respectively, and were incubated in a germination chamber at 25 ºC. Electrical conductivity was determined using a conductivity meter Micronal model B220. The Lot II seeds performed better, in terms of vigor and germination, than the Lot I seeds, regardless of other parameters. In addition, electrical conductivity decreased with... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2018 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/1878 |
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| Flores, Andressa Vasconcelos; Borges, Eduardo Euclydes de Lima e; Gonçalves, José Francisco de Carvalho; Guimarães, Valéria Monteze; Ataíde, Glauciana da Mata; Barros, Daniela de Pádua; Pereira, Márcio Dias. |
| The objective of this work was to investigate the effect of substrate, color and size on the germination and vigor of Melanoxylon brauna seeds. It was performed two essays. In the first, the seeds were classified by color (light and dark) and size (small and large). In the second essay, it was investigated the influence of substrates on sand, between sand, above paper, between paper and in paper rolls, type germitest. In both essays, the seeds were maintained in controlled conditions (light and temperature) during 10 days. The percentage of germination and germination speed index (GSI) were calculated. Furthermore, it was determined the weight of 1,000 seeds and the germination of the species was characterized by observation until the seedling formation.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Physiology; Viability; Propagation; Morphology Silvicultura - sementes florestais Fisiologia; Viabilidade; Propagação; Morfologia. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/558 |
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| Ataíde, Glauciana da Mata; Borges, Eduardo Euclydes de Lima; Flores, Andressa Vasconcelos; Castro, Renato Vinicius Oliveira. |
| A atividade fisiológica das sementes inicia-se pela absorção de água, da qual resulta na reidratação dos tecidos e desencadeamento dos eventos metabólicos da germinação. Neste contexto, o presente estudo teve como objetivo verificar a influência da qualidade fisiológica e da umidade inicial nas taxas de absorção de água de sementes de jacarandá-da-bahia (Dalbergia nigra). Foram utilizadas sementes colhidas em matrizes de duas procedências, as quais constituíram os lotes I e II. Estas foram colocadas para hidratar em água, em dessecadores com umidades relativas entre 95-99%, nas temperaturas de 15 oC e 25 oC, até atingirem aproximadamente quatro níveis de hidratação: 10%, 15%, 20% e 25% de umidade nas sementes. Os lotes foram avaliados quanto à germinação,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos Florestais; Engenharia Florestal; Silvicultura; Sementes Florestais Germinação; Vigor; Dalbergia nigra; Sementes florestais Germination; Vigor; Dalbergia nigra; Forest seeds. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/520 |
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