Data/hora: 11/06/2024 03:56:37

Provedor de dados: 	Acta Scientiarum: Agronomy	
País: 	Brazil	
Título: 	Reserve metabolism of stored and germinated Araucaria angustifolia seeds	
Autores: 	Araldi, Cristhyane Garcia; Coelho, Cileide Maria Medeiros.	
Data: 	2019-09-05	
Ano: 	2019	
Palavras-chave: 	Brazilian pine; Conifer; Protein profile; Reserve mobilization.	
Resumo: 	Germination metabolism of recalcitrant seeds of Araucaria angustifolia is activated in storage, which complicates the seeds conservation and utilization. This study aimed to identify the changes in the reserve metabolites of A. angustifolia seeds throughout storage in order to understand the processes of hydrolysis caused by germination metabolism. Mature seeds were harvested in southern Brazil and stored in an ambient environment and cold chamber conditions. Biochemical analyses were performed for embryos and megagametophytes from seeds stored for 0, 15, 30, 45, and 90 days. Due to seeds being in advanced germination in storage, they were evaluated at 90 days in different early developmental categories: I – seeds with mature embryos, II – seeds with embryos showing apparent elongation along the embryonic axis, and III – seeds with root protrusion. Higher contents of carbohydrate, protein, and amino acids were observed in embryos compared to megagametophytes, and these metabolites were decreased after onset of germination, especially in the embryo tissue. Mobilization of metabolites in megagametophytes would probably increase in later stages of germination. It is suggested that such alterations are not due to deterioration of reserve components, but instead are based on seed metabolism, which remains active after harvest with hydrolysis of metabolites providing energy for germination.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42707

10.4025/actasciagron.v41i1.42707	
Editor: 	Universidade Estadual de Maringá	
Relação: 	http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42707/751375148349	
Formato: 	application/pdf	
Fonte: 	Acta Scientiarum. Agronomy; Vol 41 (2019): Publicação Contínua; e42707

Acta Scientiarum. Agronomy; v. 41 (2019): Publicação Contínua; e42707

1807-8621

1679-9275	
Fonte: 	Copyright (c) 2019 Acta Scientiarum. Agronomy

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