56 research outputs found
Influência da temperatura de armazenamento na qualidade das sementes de Caesalpinia peltophoroides Benth. (sibipiruna)
Temperatura e substrato para o teste de germinação de sementes de barbatimão ((Stryphnodendron adstringens (Mart.) Coville (Leguminosae))
Subsídio hídrico fornecido por substratos alternativos usados na germinação in vitro de Pinus taeda L.
Alterações nas reservas de sementes de Dalbergia nigra ((Vell.) Fr. All. ex Benth.) durante a hidratação
Seed imbibitions is the first stage of the germination process and is characterized by the hydration of tissues and cells and the activation and/or induction of the enzymes responsible for mobilizing reserves for respiration and the construction of new cell structures. The objective of this study was to investigate the alterations in reserve substances during slow hydration of Bahia Rosewood (Dalbergia nigra) seeds in water. Seeds from two different lots (Lot I and II) were placed in saturated desiccators (95-99% RH) to hydrate at 15 and 25 °C until water contents of 10, 15, 20 and 25% were reached. At each level of hydration, changes in lipid reserves, soluble carbohydrates, starch and soluble proteins were evaluated. The mobilization of reserves was similarly assessed in both lots, with no differences being observed between the two hydration temperatures. Lipid contents showed little variation during hydration, while the contents of soluble carbohydrates and starch decreased after the 15% water content level. Soluble proteins showed a gradual tendency to decrease between the control (dry seeds) up to 25% water content
Emergência de plântulas de Astrocaryum aculeatum G. May. em função da temperatura e do período de embebição das sementes
Temperaturas para a germinação de sementes de capixingui (Croton floribundus - Spreng - Euphorbiaceae)
- …