SciELO - Scientific Electronic Library Online

 
vol.22 issue4Use of geographic information systems (GIS) to identify adequate sites for cultivation of the seaweed Gracilaria birdiae in Rio Grande do Norte, Northeastern BrazilHIV-1 Reverse Transcriptase: a potential target for marine products author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Revista Brasileira de Farmacognosia

Print version ISSN 0102-695X

Abstract

PEREIRA, Dinaelza Castelo; TRIGUEIRO, Thiago Gaban; COLEPICOLO, Pio  and  MARINHO-SORIANO, Eliane. Seasonal changes in the pigment composition of natural population of Gracilaria domingensis (Gracilariales, Rhodophyta). Rev. bras. farmacogn. [online]. 2012, vol.22, n.4, pp. 874-880.  Epub June 05, 2012. ISSN 0102-695X.  http://dx.doi.org/10.1590/S0102-695X2012005000075.

The concentrations of phycobiliproteins (phycoerythrin and phycocyanin), chlorophyll-a and total soluble proteins were determined monthly in three strains (red, green and brown) of Gracilaria domingensis (Kützing) Sonder ex Dickie, collected from natural populations on the coast of Rio Grande do Norte, Brazil. In all the strains, pigment and protein concentrations were higher in the months of less sunlight and greater nitrogen availability and decreased gradually with increased sunlight and decreased nutrient concentration. The red strain showed higher concentrations of phycoerythrin and total soluble proteins. The difference in the concentration of biochemical components over the course of the year indicates species acclimation to different environmental conditions.

Keywords : Gracilaria; strain; pigments; phycobilins; chlorophyll-a; proteins.

        · text in English     · pdf in English