| Revue: | Acta scientiarum. Biological sciences |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000433583 |
| ISSN: | 1679-9283 |
| Autores: | Shibata, Marília1 Coelho, Cileide Maria Medeiros2 Schmidt, Eder Carlos3 Bouzon, Zenilda Laurita3 Campos, José Marcello Salabert de4 Maraschin, Marcelo5 |
| Instituciones: | 1Universidade Federal Rural da Amazonia, Capitao Poco, Para. Brasil 2Universidade do Estado de Santa Catarina, Laboratorio de Sementes, Lages, Santa Catarina. Brasil 3Universidade Federal de Santa Catarina, Laboratorio de Biologia Celular Vegetal, Florianopolis, Santa Catarina. Brasil 4Universidade Federal de Juiz de Fora, Laboratorio de Genetica e Biotecnologia, Juiz de Fora, Minas Gerais. Brasil 5Universidade Federal de Santa Catarina, Laboratorio de Morfogenese e Bioquimica Vegetal, Florianopolis, Santa Catarina. Brasil |
| Año: | 2019 |
| Volumen: | 41 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | This study aimed at assessing the cell cycle, and anatomical and biochemical changes that the embryonic axis of Araucaria angustifolia undergoes during development, focusing on the maturation stage. During all development, cells exhibited intense metabolic activity with an abundance of mitochondria, lipid bodies, and vacuolated cells. The continued accumulation of starch and protein was observed by LM and TEM and indicated by spectra of FTIR. Cell differentiation of the procambium was observed with a thickening of the cell wall and the formation of resiniferous ducts. At Stage III and IV, cells exhibited structural changes such as altered or elongated mitochondria and presence of plastoglobules. These results suggest that there is a gradual transition from developmental metabolism to germination metabolism. Such changes can contribute to the rapid germination of seeds right after their dispersion, making it an ecological strategy to reduce post-dispersal exposure to predators and to avoid damage from reduced moisture |
| Disciplinas: | Biología |
| Palabras clave: | Fisiología vegetal, Gimnospermas, Semillas, Germinación, Ciclo celular, Diferenciación celular, Actividad metabólica, Araucaria angustifolia, Araucariaceae |
| Keyword: | Plant physiology, Gymnosperms, Seeds, Germination, Cell cycle, Cell differentiation, Metabolic activity, Araucaria angustifolia, Araucariaceae |
| Texte intégral: | http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/43381/pdf |
