Data/hora: 19/05/2024 16:24:02

Provedor de dados: 	39	
País: 	Brazil	
Título: 	Deleterious effect of TRIS buffer on growth rates and pigment content of Gracilaria birdiae Plastino &amp;amp; E.C. Oliveira (Gracilariales, Rhodophyta)	
Autores: 	Ursi,Suzana; Guimarães,Melina; Plastino,Estela Maria.	
Data: 	2008-09-01	
Ano: 	2008	
Palavras-chave: 	Culture medium; TRIS (hydroxymethyl)-aminomethane; Gracilaria birdiae; Growth; Pigments.	
Resumo: 	This work evaluated the effects of Tris (hydroxymethyl)-aminomethane (TRIS) buffer and its interaction with nutrient concentration on the development of Gracilaria birdie, a common species on the Brazilian coast that has been exploited for agar production. Responses to different conditions were assessed through growth rates and pigment content (chlorophyll a, phycoerythrin, phycocyanin and allophycocyanin). Provasoli's nutrient solution with and without TRIS addition was tested at concentrations of 12.5, 25 and 50%. The pH was also monitored. G. birdiae grew better in the absence of TRIS and at low nutrient concentrations, 12.5 and 25% (growth rates of 10.8-11.3%.day-1). Higher contents of phycoerythrin and chlorophyll a were observed without TRIS at 12.5 and 25% (Phycoerythrin, 649.6-698.0 μg g-1 fresh biomass; Chlorophyll a, 156.0-168.6 μg g-1 fresh biomass). These findings highlight the deleterious effect of TRIS on growth and phycoerythrin and chlorophyll a content. They also demonstrate the importance of appropriate nutrient concentration for laboratory cultures, depending on the intrinsic characteristics of each species.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062008000300024	
Editor: 	Sociedade Botânica do Brasil	
Relação: 	10.1590/S0102-33062008000300024	
Formato: 	text/html	
Fonte: 	Acta Botanica Brasilica  v.22 n.3 2008	
Fonte: 	info:eu-repo/semantics/openAccess