scholarly journals Genome of the red alga Porphyridium purpureum

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Debashish Bhattacharya ◽  
Dana C. Price ◽  
Cheong Xin Chan ◽  
Huan Qiu ◽  
Nicholas Rose ◽  
...  
Keyword(s):  
Red Alga ◽  
Porphyridium Purpureum

Reevaluation of mitosis in the red alga Porphyridium purpureum

Nature ◽  
1980 ◽  
Vol 283 (5745) ◽  
pp. 409-410 ◽  
Author(s):  
KATHLEEN L. SCHORNSTEIN ◽  
JOE SCOTT
Keyword(s):  
Red Alga ◽  
Porphyridium Purpureum

Induced cultivation pattern enhanced the phycoerythrin production in red alga Porphyridium purpureum

2019 ◽  
Vol 43 (2) ◽  
pp. 347-355 ◽  
Author(s):  
Yuanchao Xu ◽  
Kailin Jiao ◽  
Huichang Zhong ◽  
Shengshan Wu ◽  
Shih-Hsin Ho ◽  
...  
Keyword(s):  
Red Alga ◽  
Porphyridium Purpureum

scholarly journals Reevaluation of mitosis in the red alga Porphyridium purpureum (reply)

Nature ◽  
1980 ◽  
Vol 283 (5745) ◽  
pp. 410-410
Author(s):  
R. BRONCHART ◽  
V. DEMOULIN
Keyword(s):  
Red Alga ◽  
Porphyridium Purpureum

scholarly journals Recent mobility of plastid encoded group II introns and twintrons in five strains of the unicellular red alga Porphyridium

2014 ◽  
Author(s):  
Marie-Mathilde Perrineau ◽  
Dana C Price ◽  
Georg Mohr ◽  
Debashish Bhattacharya
Keyword(s):  
Mobile Element ◽  
Red Alga ◽  
Group Ii Introns ◽  
Porphyridium Purpureum ◽  
Spliceosomal Introns ◽  
Plastid Genomes ◽  
Endonuclease Domain ◽  
Eukaryote Evolution ◽  
Group Ii ◽  
First Time

Group II introns are closely linked to eukaryote evolution because nuclear spliceosomal introns and the small RNAs associated with the spliceosome are thought to trace their ancient origins to these mobile elements. Therefore, elucidating how group II introns move, and how they lose mobility can potentially shed light on fundamental aspects of eukaryote biology. To this end, we studied five strains of the unicellular red alga Porphyridium purpureum that surprisingly contain 42 group II introns in their plastid genomes. We focused on a subset of these introns that encode mobility-conferring intron-encoded proteins (IEPs) and found them to be distributed among the strains in a lineage-specific manner. The reverse transcriptase and maturase domains were present in all lineages but the DNA endonuclease domain was deleted in vertically inherited introns, demonstrating a key step in the loss of mobility. P. purpureum plastid intron RNAs had a classic group IIB secondary structure despite variability in the DIII and DVI domains. We report for the first time the presence of twintrons (introns-within-introns, derived from the same mobile element) in Rhodophyta. The P. purpureum IEPs and their mobile introns provide a valuable model for the study of mobile retroelements in eukaryotes and offer promise for biotechnological applications.

Ultrastructure of cell division in the unicellular red alga Flintiella sanguinaria

1986 ◽  
Vol 64 (3) ◽  
pp. 516-524 ◽  
Author(s):  
Joe Scott
Keyword(s):  
Cell Division ◽  
Cell Formation ◽  
Taxonomic Revision ◽  
Red Alga ◽  
Cell Periphery ◽  
Animal Cells ◽  
Porphyridium Purpureum ◽  
Structural Details ◽  
Red Algal ◽  
Reduced Forms

Cell division was examined with the electron microscope in the unicellular red alga Flintiella sanguinaria. Flintiella morphologically resembles Porphyridium purpureum, the only other red algal unicell that has been examined for ultra-structural details of cell division. Both genera are in the order Porphyridiales (Bangiophyceae), an unnatural assemblage of reduced forms in great need of taxonomic revision. Before mitosis, the nucleus migrates to the cell periphery. As in all red algae examined, except Porphyridium, the nucleus-associated organelle is a polar ring. At prometaphase, one or two microtubule-containing cytoplasmic invaginations penetrate the nucleus at each pole. By metaphase an intranuclear spindle is found in association with a typical metaphase chromosomal plate. The nuclear envelope is intact except for a single, large gap at each pole. Perinuclear endoplasmic reticulum is absent. An elongated anaphase interzonal midpiece is formed which breaks down at telophase. The daughter nuclei are widely separated by the chloroplast, which is constricted at the same time as daughter cell formation occurs by a cleavage furrow associated with a finely filamentous region similar to the contractile ring found in many animal cells. Because of pronounced differences in several mitotic features, it is concluded that Flintiella is not closely related to Porphyridium and instead shows closer phylogenetic ties with other macroscopic genera.

Sustained production of arachidonic and eicosapentaenoic acids by the red alga Porphyridium purpureum cultured in a light/dark cycle

1992 ◽  
Vol 74 (6) ◽  
pp. 398-402 ◽  
Author(s):  
Souichi Ohta ◽  
Thomas Chang ◽  
Osamu Aozasa ◽  
Masaomi Kondo ◽  
Hideaki Miyata
Keyword(s):  
Red Alga ◽  
Dark Cycle ◽  
Porphyridium Purpureum
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