Data/hora: 07/06/2024 13:39:30

Biblioteca(s): 	Embrapa Semiárido.	
Data corrente: 	22/02/2013	
Data da última atualização: 	13/06/2023	
Autoria: 	REIS, R. C. R.; DANTAS, B. F.; PELACANI, C. R.	
Afiliação: 	RENATA CONDURU RIBEIRO REIS; BARBARA FRANCA DANTAS, CPATSA; CLAUDINÉIA REGINA PELACANI.	
Título: 	Mobilization of reserves and germination of seeds of Erythrina velutina Willd. (Leguminosae - Papilionoideae) under different osmotic potentials.	
Ano de publicação: 	2012	
Fonte/Imprenta: 	Revista Brasileira de Sementes, v. 34, n. 4, p. 580-588, 2012.	
Idioma: 	Inglês	
Conteúdo: 	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.	
Palavras-Chave: 	Carbono de reserva; Proteínas solúveis; Stresse hídrico.	
Thesagro: 	Caatinga; Germinação; Mulungu; Recurso natural; Semente.	
Thesaurus Nal: 	Erythrina velutina; Natural resources; Water stress.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/78727/1/Barbara.pdf	
Registro original: 	Embrapa Semiárido (CPATSA)	
Exemplares: 	CPATSA - (49589-1) - UPC - AP - DD -  -  -  - DIS