Seed Dormancy
Mostrando 1-12 de 177 artigos, teses e dissertações.
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1. What is the cause of low seed germination of Zanthoxylum rhoifolium Lam.?
ABSTRACT This study aimed to determine the main causes of low germination of Zanthoxylum rhoifolium Lam. (Rutaceae) seeds. Initially, the physical and physiological qualities were evaluated in seeds from four areas (lots) (Step I). Then, tests were performed (Step II) to determine physical dormancy (imbibition in water and methylene blue), physiological (ger
Revista Ceres. Publicado em: 2022
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2. Agronomic trait selection and pre-germinative treatments in passion fruit hybrid
ABSTRACT Seed biometry and dormancy overcoming methods should be considered in the passion fruit production chain, in the seedling production stage, because of the different characteristics that condition the seedlings. The objective of this work was to identify and correlate the main biometric characteristics between seeds and seedlings and to select the be
Revista Ceres. Publicado em: 2022
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3. Hymenaea parvifolia Huber: dormancy breaking, morphology of fruit, seed and seedling
ABSTRACT The successful use of native species in conservation actions depends on basic knowledge of their biology, beginning with the identification of regenerating individuals in the field, up to the behavior and development of the species from the early stages of germination. Moreover, seed propagation and germination may be limited by the occurrence of do
Rev. Ceres. Publicado em: 2021-04
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4. Physical and physiological quality of rice seeds in function of drying temperature and storage
ABSTRACT The objective with the work was to evaluate, during storage, the rice seeds physical and physiological quality, cultivar IRGA 424 RI, dried with different drying air temperatures. For such, rice seeds were harvested with a moisture content of 22%. Then, they were subjected to drying in a cross-flow dryer, operating in an intermittent system and usin
Rev. Ceres. Publicado em: 2021-02
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5. Seed germination and dormancy break in Eragrostis polytricha, a native Brazilian grass species with potential for recovery of degraded lands
ABSTRACT Ferruginous Rocky Outcrops have high levels of species richness and endemism, but have been threatened by several anthropic actions, especially mining. Eragrostis polytricha, a common grass species in the vegetation of these outcrops, has shown promising features for use in the recovery of mining areas. However, in order to fully understand the spec
Acta Bot. Bras.. Publicado em: 2020-09
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6. Testa structure in Erythrina speciosa (Leguminosae): the role of the mucilaginous stratum in the acquisition of physical dormancy
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 inve
Acta Bot. Bras.. Publicado em: 2020-09
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7. Germination responses of Lycium humile, an extreme halophytic Solanaceae: understanding its distribution in saline mudflats of the southern Puna
ABSTRACT Although knowledge about halophytic Solanaceae is scarce, it is known that several species within genus Lycium tolerate salinity. Lycium humile grows in highly saline soils in mudflats near saline Andean lakes. This study evaluated the germination responses of L. humile under different scarification methods, photoperiods, temperatures and saline con
Acta Bot. Bras.. Publicado em: 2020-09
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8. Fire cues and germination of invasive and native grasses in the Cerrado
ABSTRACT Fire-related cues may enhance seed recruitment in flammable ecosystems and differences in fire-germination responses of invasive vs. native species can drive the invasion process. We evaluated the effects of heat shock and smoke water solution treatment on seed germination of invasive (Melinis minutiflora, Urochloa decumbens, U. brizantha) and nativ
Acta Bot. Bras.. Publicado em: 2020-03
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9. Biometria, características físicas e absorção de água de sementes de Enterolobium maximum Ducke
Resumo Enterolobium maximum Ducke é uma Fabaceae (Mimosoideae), arbórea, de crescimento rápido, com comportamento excelente para reflorestamento e recomposição de áreas degradadas. Objetivou-se com este trabalho estudar a biometria, a absorção de água e a qualidade fisiológica de sementes de Enterolobium maximum. Foram analisados: comprimento, larg
Ciênc. Florest.. Publicado em: 02/12/2019
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10. In vitro germination to overcome dormancy in seeds of ‘Red Globe’, ‘Italia’ and ‘Niagara Rosada’ grapes
Resumo A dormência em sementes de videira dificulta o avanço de muitos programas de melhoramento genético da cultura, ocasionando desuniformidade e baixa porcentagem de germinação. Os métodos convencionais utilizados para superar a dormência são demorados. Assim, a germinação in vitro das sementes torna-se uma alternativa promissora para garantir
Rev. Bras. Frutic.. Publicado em: 14/11/2019
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11. Production regions, physical and physiological quality of Brachiaria brizantha cv. BRS 'Piatã' seeds
RESUMO A qualidade das sementes é influenciada pelas condições climáticas do campo de produção. A identificação das características dos melhores campos de sementes de forrageiras permite o aprimoramento do setor. Neste estudo, objetivou-se identificar características climáticas das regiões produtoras que podem afetar as qualidades física e fisio
Rev. Ciênc. Agron.. Publicado em: 04/11/2019
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12. Southern highland papaya (Vasconcellea quercifolia A. St.-Hil.): Do fruit ripening and harvesting time affect seed germination?
ABSTRACT. In this work, we report the effects of the harvesting time, the stages in fruit ripening and the influence of potassium nitrate in V. quercifolia seed germination. In addition, information about the storage period and light requirements is provided. Fruits were harvested at the beginning and at the end of the fruiting season, and they were classifi
Acta Sci., Agron.. Publicado em: 21/10/2019