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- Title
AN UNUSUAL PHYCOCYANOBILIN-CONTAINING PHYCOERYTHRIN OF SEVERAL BLUISH-COLORED, ACROCHAETIOID, FRESHWATER RED ALGAL SPECIES.
- Authors
Glazer, Alexander N.; Chan, Crystal F.; West, John A.
- Abstract
The reproductive biology and phycobiliproteins of four different culture isolates of the freshwater algae Audouinella and 'Chantransia' were investigated. 'Chantransia' sp. (3585/UTEX 2623) and Audouinella macrospore (Wood) Sheath et Burkholder (3394,3395) from California and Minnesota reproduced only by monospores. However, A. macrospora (3603/Necchi I) reproduced by monosporangia that formed successive generations of the Audouinella phase, and Barachospermum shoots developed from the basal and erect systems. The major light-harvesting phycobiliprotein in all of these isolates was a phycocyanobilin-containing phycoerythrin not previously detected in red algae or cyanobacteria. As in the commonly found R- and B-phycoerythrins, Audouinella phycoerythrin had a native molecular mass of ∼240,000 and was made up of α, β, and γ subunits. Audouinella phycoerythrin carried two phycoerythrobilins on the α subunit; one phycourobilin, one phycoerythrobilin, and one phycocyanobilin on the β subunit; and one phycourobilin and two phycoerythrobilins on the γ subunit. With excitation at 495, 563, or 603 nm, the fluorescence emission peak of Audouinella phycoerythrin was at 626 nm, showing that phycocyanobilin was the terminal energy acceptor.
- Subjects
PHYCOBILIPROTEINS; FRESHWATER algae; PLANT proteins; PHOTOSYNTHETIC pigments; PLANT pigments; FRESHWATER phytoplankton; ALGAE; BIOLOGY
- Publication
Journal of Phycology, 1997, Vol 33, Issue 4, p617
- ISSN
0022-3646
- Publication type
Article
- DOI
10.1111/j.0022-3646.1997.00617.x