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Trends in Photochemistry & Photobiology   Volumes    Volume 10 
Effects of solar radiation on phycobiliproteins of marine red algae
Donat- P. Häder, E. Walter Helbling, Elena S. Barbieri, Michael Lebert, Rajeshwar P. Sinha
Pages: 149 - 157
Number of pages: 9
Trends in Photochemistry & Photobiology
Volume 10 

Copyright © 2003 Research Trends. All rights reserved

Three strains of marine red algae, callithamnion byssoides Lyngbye, Ceramium rubrum (Huds.) Ag., and Corallina officinalis Linnaeus, isolated form Patagonia, Argentina in February 2002, were tested for the presence and the type of phycobiliproteins.  Changes in their specific pigment content were monitored over a period of 36 h during alternating light/ dark cycles under total solar radiation (without filter) or only the PAR component of solar radiation (under a 395 nm cut-off filter).  Phycoerythrin (PE) was found to be the predominant accessory light harvesting phycobiliprotein in all three red algae.  Phycocyanin (PC) was present only in Ceramium rubrum where as allophycyanin (APC) was not detected from all the red algae tested so far.  There was a decline in the amount of PE and PC during light periods and an increase during dark periods in all the red algae showing a circadian rhythm of the phycobiliprotein destruction and resynthesis.  Although the pattern of the rhythm was similar in both samples  receiving either total (unfiltered) solar radiation or only PAR, the degree of bleaching of phycobiliproteins was more pronounced, and there was less recovery in the samples that received unfiltered solar radiation.
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