Biometry and Germinative Potential in Seeds of Peltophorum dubium (Sprengel) Taubert – Fabaceae

• Autor(a) principal: Duarte, Daniela Fialho
• Data de Publicação: 2021
• Outros Autores: Giacomelli, Felipe Brancalion, Fernandes, Simone Yasuda, Souza, Bianca de Oliveira, Morais, Glaucia Almeida de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Research, Society and Development
• Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/21204
• topic: Canafístula; Matriz; Categoria; Germinação; Superação de dormência.; Canafistula; Sede; Categoría; Germinación; Superando dormán.; Canafistula; Headquarters; Category; Germination; Overcoming dorman.

The growing search for high quality seeds for reforestation has increased the interest in knowledge related to seed biology such as biometric characteristics, in order to make the production of seedlings of some species more viable. Thus, the aim of this study was to analyze the biometry of seeds from different matrices of Peltophorum dubium (Spreng) Taubert, and relate it to germination potential and dormancy intensity in different seed sizes. Seeds were collected in 12 matrices and evaluated for length, width, thickness and mass. The data obtained were subjected to tests to compare the matrices, verify the relationship between the variables and to define seed categories based on mass classes (small, medium and large). The germination potential of each matrix and of the three seed categories was evaluated comparing intact seeds and seeds submitted to dormancy breaking in sulfuric acid. Germination data were used to calculate percentage, relative frequency, speed index and mean time. The matrices and categories were compared statistically by analysis of variance. The correlation of biometric data of the seeds was positively significant for all comparisons, with stronger associations for associations with mass, a variable used to define size categories. The scarified seeds obtained, on average, 90% germination while the control 4%. Medium and large seeds showed better germination performance, without influence of the light regime (continuous light and 12-hour photoperiod). We conclude in this study that Peltophorum dubium seeds biometrically resemble lots from geographically closer regions and that there is variability between matrices, which is an important factor for population maintenance. Furthermore, we also observed that the mass variable is an adequate parameter for the selection of seeds with greater germination potential.