Data/hora: 09/06/2024 07:41:09

Biblioteca(s): 	Embrapa Semiárido.	
Data corrente: 	31/07/2014	
Data da última atualização: 	31/07/2014	
Autoria: 	RIBEIRO, R. C.; MATIAS, J. R.; PELACANI, C. R.; DANTAS, B. F.	
Afiliação: 	RENATA CONDURU RIBEIRO; JANETE RODRIGUES MATIAS; CLAUDINÉIA REGINA PELACANI; BARBARA FRANCA DANTAS, CPATSA.	
Título: 	Activity of antioxidant enzymes and proline accumulation in Erythrina velutina Willd. seeds subjected to abiotic stresses during germination.	
Ano de publicação: 	2014	
Fonte/Imprenta: 	Journal of Seed Science, v. 36, n. 2, p. 231-239, 2014.	
DOI: 	10.1590/2317-1545v32n2956	
Idioma: 	Inglês	
Conteúdo: 	The aim of this study was to evaluate the effect of different abiotic stresses on the activity of antioxidant enzymes and on accumulation of proline in Erythrina velutina Willd. seeds during germination. Mulungu seeds were scarified and placed to germinate at constant temperatures of 15, 25, and 35 °C, moistened with distilled water, and exposed to 12 h of light. Other seeds were exposed to solutions of NaCl (EC of 0, 4, and 8 dS.m-1) and polyethylene glycol (osmotic potentials of 0.0, -0.2, and - 0.6 MPa) and maintained in a germination chamber set at 25 °C and 12 h photoperiod for seven days. At the end of each period of imbibition, the embryonic axis and cotyledons of the seedlings were collected separately and used to quantify proline content and the activity of antioxidant enzymes. These were detected in both the cotyledons and embryonic axis of the mulungu seeds. Antioxidant activity varied depending upon the type and degree of stress applied. It was concluded that under the aspect of the detoxification process, the mechanism found in mulungu seeds is more efficient when subjected to different temperatures followed by salt stress and water stress.	
Palavras-Chave: 	Antioxidative metabolism; Estresse abiótico.	
Thesagro: 	Caatinga; Germinação; Mulungu; Semente.	
Thesaurus Nal: 	Erythrina velutina; Water stress.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/105776/1/Barbara-3.pdf	
Registro original: 	Embrapa Semiárido (CPATSA)	
Exemplares: 	CPATSA - (53035-1) - UPC - AP - DD -  -  -  - DIS