33 documents found, page 1 of 4
Hydropriming changes temperature thresholds for seed germination of tree specie...
Nascimento,Joana Paula Bispo; Dantas,Bárbara França; Meiado,Marcos ViniciusAbstract: This study evaluates the effects of hydration and dehydration cycles (HD cycles) on seed germination of four Caatinga tree species (Anadenanthera colubrina var. cebil, Enterolobium contortisiliquum, Pityrocarpa moniliformis and Pterogyne nitens) subjected to different temperatures and determine the thermal upper and lower limits of germination. For this, seeds were subjected to 0, 1, 2 and 3 HD cycles...
Environmental stress, future climate, and germination of Myracrodruon urundeuva...
Oliveira,Gilmara Moreira de; Silva,Fabricio Francisco Santos da; Araujo,Marcelo do Nascimento; Costa,Danielle Carolina Campos daAbstract: Myracrodruon urundeuva, a native species from the Brazilian Caatinga, is widely distributed across its endemic region, where it also plays an essential socioeconomic role. The objective of this study was to evaluate the influence of environmental stress on the germination of M. urundeuva seeds harvested in different years (2010 to 2013). Seeds were germinated at constant temperatures between 10 to 40 ...
Does discontinuous hydration of Senna spectabilis (DC.) H.S. Irwin & Barneb...
Lima,Ayslan Trindade; Cunha,Paulo Henrique de Jesus da; Dantas,Bárbara França; Meiado,Marcos ViniciusAbstract: Seed hydration memory is the ability of seeds to retain biochemical and physiological changes caused by discontinuous hydration. This study aimed to determine if Senna spectabilis (DC.) H.S. Irwin & Barneby var. excelsa (Schrad.) H.S.Irwin & Barneby (Fabaceae) present seed memory and evaluate the effects of hydration and dehydration cycles (HD) on the seed germination of this species when submitted to...
Thermal stress and physiological changes in watermelon seeds
Silva,Rita de Cássia Barbosa da; Araujo,Marcelo do Nascimento; Ornellas,Fábio Luiz Santos; Dantas,Bárbara FrançaABSTRACT Given that watermelon is a crop widespread around the world, there is considerable interest in verifying how its seeds physiologically behave under unfavorable temperature conditions. This study aimed to evaluate the biochemical changes mobilization and reserves degradation, as well as the enzyme activity, during seed germination and initial growth of watermelon seedlings subjected to thermal stress, u...
Size and vigor of Anadenanthera colubrina (Vell.) Brenan seeds harvested in Caa...
Bispo,Jaciara de Souza; Costa,Danielle Carolina Campos da; Gomes,Samara Elizabeth Vieira; Oliveira,Gilmara Moreira de; Matias,Janete RodriguesAbstract: Angico is a species found in several environments in Brazil, with several applications. It is used in the timber industry and mainly in folk medicine. In order to verify a variation in the biometric characteristics and the quality of seeds from different mother-plants in different harvesting years, the following variables were studied: moisture content, diameter, density, electrical conductivity, fres...
Seed quality of Amburana cearensis (Allemão) A.C. Sm. (Fabaceae) is influenced ...
Araujo,Marcelo do Nascimento; Ferraz,Marisol; Américo,Fabiana Karla Araújo; Silva,Fabrício Francisco Santos; Dantas,Bárbara FrançaAbstract: The aim of this study was to evaluate the effects of storage conditions on the germination of A. cearensis seeds. The experimental design was completely randomized into split plots over time with four replicates. The storage conditions of the airtight containers in the refrigerator and laboratory, paper bags in the laboratory and liquid nitrogen were assessed for 27 months. In the laboratory, we evalu...
SYNCHRONIZING THE in vitro GERMINATION OF Psidium guineense Sw. SEEDS BY MEANS ...
Santos,Márcia Adriana Carvalho dos; Rego,Mailson Monteiro do; Queiroz,Manoel Abilio de; Dantas,Bárbara França; Otoni,Wagner CamposABSTRACT The Brazilian guava (Psidium guineense Swartz) is seed-propagated and, being native to the Caatinga biome, may frequently have uneven germination.Thus, we aimed to evaluate the synchronization of the in vitro seed germination of three accessions of the Brazilian guava, using water, polyethyleneglycol (PEG 6000), and potassium nitrate (KNO3) at different potentials and times of osmotic priming. Seeds fr...
Seed germination of Brazilian guava (Psidium guineense Swartz.)
Santos,Márcia Adriana Carvalho dos; Queiróz,Manoel Abílio de; Bispo,Jaciara de Souza; Dantas,Bárbara FrançaBrazilian guava (Psidium guineense Swartz.) is a plant species native from Brazil and present in all Brazilian biomes. This species occurs in the Caatinga biome as a wild fruit that has broad utility and can generate income, as well as provide material for breeding. The objective of this work was to study seed germination of guava accessions collected in two municipalities in Bahia. Seeds imbibition curve was s...
Physiological changes in osmo and hydroprimed cucumber seeds germinated in bios...
Matias,Janete Rodrigues; Ribeiro,Renata Conduru; Aragão,Carlos Alberto; Araújo,Gherman Garcia Leal; Dantas,Bárbara FrançaBiosaline agriculture has been a viable alternative for agricultural production in regions with lack of good quality water. To enable the cultivation of vegetables in high electrical conductivities, seed priming has been used to increase tolerance to stress caused by use of brackish water. We aimed to evaluate the efficiency of osmo and hydropriming in cucumber seeds cv. Caipira germinated biosaline in water, r...
Caracterization of seed germination of Zephyranthes sylvatica (Mart.) Baker (Am...
Silva,Mayara Wesley da; Barbosa,Laise Guerra; Silva,José Eduardo Santos Barboza da; Guirra,Keylan Silva; Gama,Diego Rangel da SilvaZephyranthes sylvatica is a beautiful lily, endemic from the Brazilian Caatinga. Although it has a great ornamental potential, little is known about this species, especially regarding its seeds germination process. Aiming to characterize the germination of Z. sylvatica seeds, we studied its imbibition curve, optimum temperature and substrate for germination and seedling emergence, osmotic and salt stress tolera...