Effects of solar radiation on phycobiliproteins of marine red algae

SINHA, R.P,; BARBIERI, E.S.; LEBERT, M.; HELBLING, E.W.; HÄDER, D.P.

TRENDS IN PHOTOCHEMISTRY AND PHOTOBIOLOGY

RESEARCH TRENDS

Lugar: INDIA; Año: 2003 vol. 10 p. 149 - 157

0972-4532

<!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-1610611985 1107304683 0 0 159 0;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-indent:9.05pt; line-height:150%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-fareast-language:EN-US;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-family:"Times","serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Calibri; mso-bidi-theme-font:minor-latin; mso-fareast-language:EN-US;} .MsoPapDefault {mso-style-type:export-only; text-align:justify; text-indent:9.05pt; line-height:150%;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> Three strains of marine red algae, Callithamnion byssoides Lyngbye, Ceramium rubrum (Huds.) Ag., and Corallina officinalis Linnaeus, isolated from 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 dominant accessory light harvesting phycobiliprotein in all three red algae. Phycocyanin (PC) was present only in Ceramium rubrum whereas allophycocyanin (APC) was altogether absent from all the red algae tested so far. There was a decline in the amount of PE during light periods and an increase during dark periods in all the red algae; PC has a similar behavior in C. rubrum, 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.