Genetic polymorphism of some algal species
2005
Duca, M. | Chumac, D. | Rudic, V. | Turcan, E.
The genome of eukaryotic organisms consists of zones with different number of copies. The goal of the present research was to compare some properties of eukaryotic (Dunaliella salina and Porphyridium crunentum) and prokaryotic (Spirulina platensis) algal genomes. The highest denaturation temperatures are specific to halophilous algae Dunaliella (90 deg C), whereas the lowest were observed at red algae Porphyridium (83 deg C). Spirulina showed intermediate values (87 deg C). The study of the distribution of the regions with different number of copies in the analysed algae showed that unique sequences are present in genomes of all species. The quantity of medium repetitive sequences is significantly lower in Spirulina. In Spirulina genome highly repetitive nucleotide sequences (uncharacteristic for prokaryotes) were also identified, which play roles in structural organization of chromosomes.
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