1. In general, cell diameters (without sheaths) increased in cells cultivated at the temperature of 30°C and at the irradiance of 150 W. m-2 PhAR, in agreement with higher values of the average dry masses of one cell ascertained under the mentioned conditions.
2. Extremely large cells were occasionally observed.
3. The smallest cells were found in strain SAG 1380-2.
4. Photosynthetic pigments. Attention was paid to the content of phycocyanin, a light-harvesting blue phycobiliprotein located in disc-shaped phycobilisomes for its influence on algal growth.
5. Shapes of curves of in vivo photosynthetic pigment absorption spectra depended on the composition and nutrient concentration of the media. The ratios of absorbances of phycocyanin (maximum at 635 nm) and chlorophyll a (maximum at 683 nm) of nutrient-saturated cells differed in the media with organic compounds (1.15 to 1.4) and without them (approx. 0.9).
6. Cells from the nutrient-deficient medium lost phycocyanin first, afterwards the amount of the chlorophyll a lowered, too.
Pekárková B, et al. Cell morphology and growth characteristics of Porphyridiumaerugineum(Rhodophyta).
Pl. Syst. Evol. 1988, 164: 263-272
From Patrick J. Keeling ,at Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada and Canadian Institute for Advanced Research, Integrated Microbial Biodiversity program, Canada.
Keeling PJ, Burki F, Wilcox HM, Allam B, Allen EE, Amaral-Zettler LA, et al. (2014) The Marine Microbial Eukaryote Transcriptome Sequencing Project (MMETSP): Illuminating the Functional Diversity of Eukaryotic Life in the Oceans through Transcriptome Sequencing. PLoS Biol 12 (6): e1001889.