Data/hora: 03/06/2024 02:44:48

Provedor de dados: 	39	
País: 	Brazil	
Título: 	Germinability after desiccation, storage and cryopreservation of seeds from endemic Encholirium Mart. ex Schult. &amp;amp; Schult. f. and Dyckia Schult. &amp;amp; Schult. f. species (Bromeliaceae)	
Autores: 	Tarré,Erika; Pires,Bárbara Balzana Mendes; Guimarães,Ana Paula Mançano; Carneiro,Leonardo Alves; Forzza,Rafaela Campostrini; Mansur,Elisabeth.	
Data: 	2007-12-01	
Ano: 	2007	
Palavras-chave: 	Cryopreservation; Espinhaço mountain range; Germination; Orthodox seeds; Seed conservation.	
Resumo: 	(Germinability after desiccation, storage and cryopreservation of seeds from endemic Encholirium Mart. ex Schult. &amp;amp; Schult. f. and Dyckia Schult. &amp;amp; Schult. f. species (Bromeliaceae)). Seed storage procedures require previous determination of optimal temperature and light conditions for germination, as well as of tolerance to desiccation and low temperatures. The aim of this paper was to study the effects of desiccation, storage at low temperatures and cryopreservation on the germinability of seeds of six Encholirium and two Dyckia species, which were selected according to vulnerability criteria. Initial germinability of newly harvested seeds varied from 35 to 95%. Seeds presented photoblastic behaviour since light was necessary to induce or increase germination. Except for E. heloisae and E. scrutor, desiccation did not affect significantly the germinability of tested seeds. Storage for one year at 4 and -20 ºC did not affect the germinability of desiccated seeds, except for E. pedicellatum. Germinability after freezing in liquid nitrogen was higher than or similar to control seeds for all species. However, freezing tolerance of E. pedicellatum seeds was only achieved after desiccation to 2.5% moisture content. As regards tolerance to desiccation and to storage at low temperatures, the seeds studied here can be classified as orthodox and conserved ex situ.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000400003	
Editor: 	Sociedade Botânica do Brasil	
Relação: 	10.1590/S0102-33062007000400003	
Formato: 	text/html	
Fonte: 	Acta Botanica Brasilica  v.21 n.4 2007	
Fonte: 	info:eu-repo/semantics/openAccess