Data/hora: 11/06/2024 01:08:19

Provedor de dados: 	3	
País: 	Brazil	
Título: 	Dynamics in global DNA methylation and endogenous polyamine levels during protocorm-like bodies induction of Cattleya tigrina A. Richard	
Autores: 	Almeida, Vivian; Fraga, Hugo Pacheco de Freitas; Navarro, Bruno Bachiega; Guerra, Miguel Pedro; Pescador, Rosete.	
Data: 	2017-11-24	
Ano: 	2017	
Palavras-chave: 	2.03.00.00-0; 2.03.03.00-9; 2.03.06.00-8 orchids; Micropropagation; In vitro culture; Epigenetics; PLBs. Botânica.	
Resumo: 	Cattleya tigrina is endemic to the Atlantic forest biome and classified as vulnerable in the Red Book of Brazilian Flora. In vitro techniques comprise valuable tools for the conservation of endangered plant species. The aim of the present study was to evaluate the morphological features, global DNA methylation levels and free polyamines during protocorm-like bodies (PLBs) induction of C. tigrina. Along with that, an efficient protocol for in vitro propagation of this species is proposed. The first evidences of PLBs induction in C. tigrina occurred at seven days in culture, starting from the basal portion of the leaf abaxial surface. A hypomethylation marked the beginning of cell differentiation, followed by an increased global DNA methylation at 35 days in culture, coinciding with a subtle change in the structures morphogenetic development. During PLBs induction, putrescine exhibited higher levels as compared to spermidine and spermine, and apparently presents a major role during the PLBs induction in C. tigrina. Due to the apparent secondary PLBs formation, this protocol can represent a highly efficient method for in vitro propagation of this species. 	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/36656

10.4025/actascibiolsci.v39i4.36656	
Editor: 	Universidade Estadual De Maringá	
Relação: 	http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/36656/pdf	
Formato: 	application/pdf	
Fonte: 	Acta Scientiarum. Biological Sciences; v. 39, n. 4 (2017); 497-505

Acta Scientiarum. Biological Sciences; v. 39, n. 4 (2017); 497-505

1807-863X

1679-9283	
Fonte: 	Direitos autorais 2017 Acta Scientiarum. Biological Sciences