Data/hora: 13/06/2024 05:51:54

Provedor de dados: | 95
País: | Brazil
Título: | Mobilization of reserves and germination of seeds of Erythrina velutina Willd. (Leguminosae - Papilionoideae) under different osmotic potentials
Autores: | Reis,Renata Conduru Ribeiro; Dantas,Bárbara França; Pelacani,Claudinéia Regina.
Data: | 2012-01-01
Ano: | 2012
Palavras-chave: | PEG 6000; Water-stress; Carbon of storage; Soluble proteins; "mulungu"; "caatinga".
Resumo: | Some environmental factors, including water availability, may influence seed germination. This study investigated the germination of E. velutina seeds submitted to different osmotic potentials and mobilization of reserves during water-stress. Scarified seeds were arranged in paper rolls and soaked in solutions of Polyethylene Glycol (PEG) prepared in osmotic potentials 0.0, -0.2, -0.4, -0.6, and -0.8 MPa and kept into a seed germinator, at 25 °C, and 12/12 h photoperiod (L/D), during 10 days. The percentage, mean time, mean speed, germination speed index; as well as the germination uniformity coefficient were assessed. During germination process the total soluble sugars, reducing sugars, soluble protein, and total amino acids were quantified in the cotyledon, hypocotyl and radicle of soaked seeds and cotyledons of quiescent seeds (control). There was influence of osmotic potential on E. velutina seed germination. The germination percentage remained at high levels until -0.6 MPa and above this osmotic potential there has been no germination. The mobilization of stored reserves of carbon and nitrogen in E. velutina seeds was also influenced by water-stress. There was sensitiveness between -0.2 and -0.6 MPa; however, the degradation and the mobilization of reserves was slower when the osmotic potential decreased.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000400008
Editor: | Associação Brasileira de Tecnologia de Sementes
Relação: | 10.1590/S0101-31222012000400008
Formato: | text/html
Fonte: | Revista Brasileira de Sementes  v.34 n.4 2012
Fonte: | info:eu-repo/semantics/openAccess