Data/hora: 15/06/2024 09:58:41

Biblioteca(s): 	Embrapa Agrobiologia; Embrapa Trigo.	
Data corrente: 	27/06/1995	
Data da última atualização: 	27/06/1995	
Autoria: 	ELLIS, R. H.; SIMON, G.; COVELL, S.	
Título: 	The influence of temperature on seed germination rate in grain legumes. III. A comparison of five faba bean genotypes at constant temperatures using a new screening method.	
Ano de publicação: 	1987	
Fonte/Imprenta: 	J. Exp. Bot., v.38, n.191, p.1033-1043, 1987.	
Idioma: 	Inglês
Português	
Conteúdo: 	A screening procedure which requires information on the progress of germination at only four temperatures was able to define the response of the rate of seed germination to sub- and supra-optimal temperatures for whole seed populations of each of five faba bean (Vicia faba L.) genotypes. In one population of the cultivar Sutton the models for sub- and supra-optimal temperatures derived from the screen satisfactorily explained observations from an earlier separate investigation at a wider range of temperatures. Two discrete groups of genotypes were identified. Within each group the base temperature Tb did not differ significantly: for the landraces Lebanese Local Large and Syrian Local Large the value was estimated to be ?7·5°C and for the landrace Lebanese Local Small and the cultivars Sutton and Aquadulce it was ?4·0°C. The optimum temperature for the 50th percentile [To(50), at which temperature the rate of germination is maximal] also varied between these two groups of genotypes, being 20·5–21·5°C for the first group and 24·5–26·0°C for the second. In several temperature regimes some of the viable seeds within a seed population failed to germinate. Nevertheless, even at temperatures where a substantial proportion of the seeds failed to germinate the models defined by the screening method predicted the germination times of those seeds which did germinate.	
Palavras-Chave: 	LEGUMINOSA DE GRAO.	
Thesagro: 	Germinação; Grão; Semente; Temperatura.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Agrobiologia (CNPAB)	
Exemplares: 	CNPAB - (13611-1) - ADC - SP - -- -  -  - 11705 - DIS
CNPT - (41618-1) - ADD - SP - PP - 15875 -  - 15875 - DIS