Data/hora: 22/09/2024 21:41:47

Biblioteca(s): 	Embrapa Soja.	
Data corrente: 	17/09/1998	
Data da última atualização: 	08/03/2006	
Autoria: 	BELHASSEN, E.; CASTIGLIONI, V. B. R.; CHIMENTI, C.; GRIVEAU, Y.; JAMAUX, I.; STEINMETZ, A.	
Título: 	Looking for physiological and molecular markers of leaf cuticular transpiration using interspecific crosses between Helianthus argophyllus and H. annuus.	
Ano de publicação: 	1996	
Fonte/Imprenta: 	In: SYMPOSIUM ON DROUGHT TOLERANCE IN SUNFLOWER, 2., 1996, Paris. Drought tolerance in sunflower. Paris: International Sunflower Association, 1996.	
Páginas: 	p.39-51.	
Idioma: 	Inglês	
Conteúdo: 	A selection of drought tolerant genotypes of sunflower was attempted. Starting from an interspecific cross with H. argophyllus, four cycles of divergent selection on a physiological criteria in relation with the cuticular transpiration of leaf (the Relative Water Loss) allow the production of two contrasted genotype: T- (low level of leaf cuticular transpiration) and T+ (high level leaf cuticular transpiration). Field experiments show better yield tolerance index combined with good potential yield for T- hybrids in some location. Physiological analysis done in the in field and in controlled conditions allow to distinguish the two genotypes for only one parameters: the osmotic adjustment. Molecular comparison revealed the existence of a DNA differentiating T- from T+. This cDNA has high homology with a amino-acid transporter. A quantification of the amino-acid concentrations during water deficit in T- and T+ lines, show that the T- plant accumulate significantly more proline than T+ ones. RFLP and STS analysis using this cDNA allow to differentiate the two lines.  	
Palavras-Chave: 	Ajustamento osmotico; Brasil; Drought resistance; Franca; Genotypes; Marcadores moleculares; Osmotic adjustment; Parana; Physiological markers; Sunflower; Transpiracao.	
Thesagro: 	Fisiologia; Genótipo; Girassol; Helianthus Annuus; Resistência a Seca.	
Thesaurus Nal: 	Argentina; Brazil; France; Helianthus argophyllus; physiology; transpiration.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Soja (CNPSO)	
Exemplares: 	CNPSO - (15809-1) - UPC - PL - -- - 4740 -  -  - DIS