Data/hora: 05/06/2024 12:11:22

Biblioteca(s): 	Embrapa Mandioca e Fruticultura.	
Data corrente: 	28/07/1995	
Data da última atualização: 	08/11/1995	
Autoria: 	CONN, E. E.	
Afiliação: 	Section of Molecular and Cellular Biology, University of California, Davis, California 95616 USA.	
Título: 	Cyanogenesis - A personal perspective.	
Ano de publicação: 	1994	
Fonte/Imprenta: 	Acta Horticulturae, n.375, 1994.	
ISSN: 	0567-7572	
Idioma: 	Inglês	
Conteúdo: 	The past 35 years have provided much new knowledge of the process of cyanogenesis in higher plants. In 1958, when the first studies establishing the biosynthetic origin of the aglycone of a cyanogenic glycoside from a protein amino acid were published, only a dozen cyanogenic glycosides had been described. Fewer than half of those had been rigorously characterized, although the list included linamarin, first isolated from Linum. Today, more than 60 cyanogenic. Although the biosynthesis of cyanogenic glycosides was examined vigorously in our laboratory for 20 years, important details of the biosynthetic sequence are still being sorted out by others in 1993. One surprising observation made during our biosynthetic work was the metabolism of HCN released from cyanogenic glycosides to form B-cyanoalanine and asparagine. This detoxification process retains the nitrogen atom of the cyanogenic glycosides in metabolites that lead to ammonia. In this way, the nutritionally significant nitrogen atom is conserved and returned to the plants nutritio as ammonia. Compartmentalization of cyanogenic glycosides away from their catabolic enzymes is self evident. Some details of that process were first described in 1980 for soughum leaves. Studies in other species, including cassava, folloowed. The situation in seeds of Prunus serotina has recently been documented in exquisite detail. This type of information is essential when attempting to understand how cyanogenic glycosides can be transferred between tissues within the same plant.	
Palavras-Chave: 	Compartmentation; Cyanogenic glucosides; Dhurrin; HCN metabolism; Linamarin.	
Thesaurus Nal: 	cassava.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
Exemplares: 	CNPMF - (3237-1) - ADC - AP - -- - 635.05 -  - 635.05 - DIS
CNPMF - (3521-1) - ADC - AP - -- - 635.05 -  - 635.05 - DIS