Data/hora: 03/06/2024 05:16:59

Provedor de dados: | 3
País: | Brazil
Título: | Anatomical and biochemical changes associated with the development and germination of Araucaria angustifolia seeds
Autores: | Shibata, Marília; Coelho, Cileide Maria Medeiros; Schmidt, Eder Carlos; Bouzon, Zenilda Laurita; Campos, José Marcello Salabert de; Maraschin, Marcelo.
Data: | 2019-07-22
Ano: | 2019
Palavras-chave: | 2.03.00.00-0 Botânica; 2.03.03.00-9 Fisiologia Vegetal; 5.02.01.04-2 Sementes Florestais maturation; Recalcitrant seed; Light microscopy; Transmission electron microscopy; Flow cytometry Botânica.
Resumo: | 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/43381

10.4025/actascibiolsci.v41i1.43381

Editor: | Universidade Estadual De Maringá

Relação:

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/43381/pdf

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/43381/19013

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/43381/19019

Formato: | application/pdf

Fonte:

Acta Scientiarum. Biological Sciences; v. 41 (2019): Publicação contínua; e43381

Acta Scientiarum. Biological Sciences; v. 41 (2019): Publicação contínua; e43381

1807-863X

1679-9283

Fonte:

Direitos autorais 2019 Acta Scientiarum. Biological Sciences

http://creativecommons.org/licenses/by/4.0