Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/3922
Title: Carrageenophytes of occidental Portuguese coast: 1-spectroscopic analysis in eight carrageenophytes from Buarcos bay
Authors: Pereira, Leonel 
Mesquita, José F. 
Keywords: Portugal; Carrageenophytes; Carrageenan; FT-Raman; 13C NMR
Issue Date: 2003
Citation: Biomolecular Engineering. 20:4-6 (2003) 217-222
Abstract: Infrared and Raman spectroscopic analysis of the carrageenan (alkaline extraction) in eight species (representing seven genera and four families) of Gigartinales, in different reproductive phases from Buarcos bay (Figueira da Foz, Portugal), were studied. Female gametophytes and non-fertile thalli samples of Chondrus crispus, Mastocarpus stellatus, Chondracanthus teedei var. lusitanicus, Gigartina pistillata and Chondracanthus acicularis present a [kappa]-carrageenan profile or varying degrees of a [kappa]-[iota] hybrid. The presence of [kappa]-[iota] hybrid carrageenan in C. teedei var. lusitanicus was confirmed by 13C NMR. The carrageenans extracted from Gymnogongrus crenulatus and Ahnfeltiopsis devoniensis are constituted mainly by [iota]-carrageenan but seasonal variations in the nature of carrageenans are present. [lambda]-Family carrageenans were found in tetrasporophytes of C. crispus, M. stellatus, C. teedei var. lusitanicus, C. acicularis and G. pistillata. Calliblepharis jubata presents carrageenans of [iota]-type in all reproductive stages.
URI: http://hdl.handle.net/10316/3922
DOI: 10.1016/S1389-0344(03)00056-X
Rights: openAccess
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais

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