ISSN:
1615-6110
Keywords:
Algae
;
Dinophyta
;
Gymnodinium aeruginosum
;
Anucleate cryptophycean endosymbiont
;
evolution
;
ribosomes in an anucleate compartment
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Gymnodinium aeruginosum has the usual fine structure of a dinoflagellate but does not seem to contain a well elaborated peduncle or a microtubular basket. Naked cells are surrounded by a single large amphiesmal vesicle. It houses an endosymbiont with typical blue-green cryptophycean chloroplasts (generally only one), cryptophycean starch grains in the periplastidal cytoplasm without a nucleomorph, and two membranes separating the periplastidal cytoplasm from the cryptophycean cytoplasm which contains mitochondria, ER, vesicles and ribosomes, but no eukaryotic nucleus. The endosymbiont is surrounded by a single membrane. Possible ways of the acquisition of the endosymbiont and the problem of the existence of ribosomes within a compartment without nucleus are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00940431
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