Data/hora: 13/06/2024 07:18:29

Provedor de dados: 	61	
País: 	Brazil	
Título: 	Tropical seed species' responses to liquid nitrogen exposure	
Autores: 	Salomão,Antonieta Nassif.	
Data: 	2002-08-01	
Ano: 	2002	
Palavras-chave: 	Cryopreservation; Ex situ conservation; Seed dormancy.	
Resumo: 	The ability to tolerate ultra-low temperature (-196 ºC) exposure was evaluated in 66 tropical orthodox seed species of 21 botanical families from the Cerrado (Brazilian Savannah) and Atlantic Forest Brazilian biomes. Liquid nitrogen had no effect on the germinability of 51 seed species. The stimulatory effect of cryogenic temperature on germinability, with or without subsequent chemical scarification, was observed in nine seed species with deep physical dormancy, or heterogeneous levels of seed hardness, or with no dormancy. Significant reduction in germinability occurred in six seed species, presumably because of factors acting individually or in combination on these seeds, such as inappropriate moisture content, or the potentially detrimental effect of rapid cooling (263 ºC.min-1) or fungal contamination. The results obtained suggest that cryopreservation may be a promising alternative for storing most of the seed species tested.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000200008	
Editor: 	Brazilian Journal of Plant Physiology	
Relação: 	10.1590/S1677-04202002000200008	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Plant Physiology  v.14 n.2 2002	
Fonte: 	info:eu-repo/semantics/openAccess