Morfologia e qualidade fisiológica de sementes de Luetzelburgia auriculata (Allemão) Ducke

• Autor(a) principal: Rangel, Izabela Souza Lopes
• Data de Publicação: 2016
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/123456789/14534
• topic: Pau-mocó; Análise de sementes; Temperatura; Volumes de água; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA

The species Luetzelburgia auriculata (Allemão) Ducke, known as pau-mocó is an arboreal species from the Fabaceae family, food supplier for animals and wood for construction. The morphological aspects of fruits, seeds, germination and seedling provide support to seed technology, in order to interpret the germination and vigor tests. Given the above, this study objectives were to determine the morphology of fruits, seeds and initial development of seedlings, the physiological quality of seeds of different matrices and the germination of L. auriculata seeds due to different temperatures and water volumes for substrate wetting. The research was conducted at the Laboratories of Seed’s Analysis and Biology belonging to the Center of Agricultural Science of the Federal University of Paraíba, Areia - PB in experimental design completely randomized (germination and vigor tests) and a randomized block design (field emergence). For morphological description of fruits, seeds, germination and seedling fruit measurements were carried out and seeds as well as photographs to record the characteristics. To evaluate the physiological quality of seeds of different mother trees it was determined the water content, weight of a thousand seeds, germination, emergence, first count and germination speed index and emergency percentage of normal seedlings, leaf number, length and dry mass of seedlings and the shoot / root ratio. To evaluate the influence of different temperatures (constant 20, 25, 30 and 35 °C and alternated 20-30 °C) and water volumes for wetting the substrate (2,0; 2,5; 3,0 and 3,5 times the mass of dry substrate), the variables were germination percentage, first count and speed index and percentage of abnormal seedlings, length and dry mass of shoots and roots of normal seedlings. The mother tree 19 produced seeds with the most quality, and those can be indicated for dispersion and reproduction, but as well as the seeds from the mother trees 4, 13 and 19 been plant producers of seeds with higher physiological quality. The constant temperatures of 25 and 30 °C and alternated of 20-30 °C and the water volumes of 2,5 to 3,0 times the dry weight are appropriated to the germination and vigor tests conduction. The temperatures of 20 and 35 °C at different water volumes used to moisture the substrate reduced the germination and vigor of the seeds of Luetzelburgia auriculata (Allemão) Ducke.