Data/hora: 09/06/2024 10:30:06

Provedor de dados: 	88	
País: 	Brazil	
Título: 	The effect of water stress on seed germination of three terrestrial bromeliads from restinga	
Autores: 	Mantovani,André; Iglesias,Ricardo R.	
Data: 	2010-03-01	
Ano: 	2010	
Palavras-chave: 	Bromeliaceae; PEG; Sandy plains; Seed.	
Resumo: 	Bromeliad seedlings are rarely found on sandy coastal plains (restinga), limited, probably, by stressful conditions and/or specific abiotic requirements for germination. The effect of water stress on rate, time, synchronicity and spreading of germination was evaluated here for three terrestrial bromeliads from the restinga of Maricá using osmotic solutions of polyethyleneglicol 6000 (PEG 6000), from 0.0 to -0.26 MPa for 30 days. Water stress induced by PEG lowered rate and increased time and synchronicity values, besides the number of daily events of bromeliad seed germination, under water potentials between 0.00 to -0.14 MPa. No seeds germinated under water potentials lower than -0.14 MPa. These results reinforce a constant and/or high moisture requirement for bromeliad seeds to germinate. We conclude that bromeliads are not able to act as pioneer plants through germination outside the vegetation islands of the restinga of Maricá, due to the inability of seeds to germinate under lower water potential.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000100017	
Editor: 	Sociedade Botânica de São Paulo	
Relação: 	10.1590/S0100-84042010000100017	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Botany  v.33 n.1 2010	
Fonte: 	info:eu-repo/semantics/openAccess