Abstract
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Journal of Eukaryotic Microbiology |
| Vol/bind | 57 |
| Udgave nummer | 4 |
| Sider (fra-til) | 308-321 |
| Antal sider | 14 |
| ISSN | 1066-5234 |
| DOI | |
| Status | Udgivet - 2010 |
Bibliografisk note
Keywords:Eyespot;Gymnodinium;morphology;nuclear pore;parasitic bacteria;phylogeny;pusule;ventral connectiveAdgang til dokumentet
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I: Journal of Eukaryotic Microbiology, Bind 57, Nr. 4, 2010, s. 308-321.
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
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TY - JOUR
T1 - Ultrastructure of the harmful unarmored dinoflagellate Cochlodinium polykrikoides (Dinophyceae) with reference to the apical groove and flagellar apparatus
AU - Iwataki, Mitsunori
AU - Hansen, Gert
AU - Moestrup, Øjvind
AU - Matsuoka, Kazumi
N1 - Keywords:Eyespot;Gymnodinium;morphology;nuclear pore;parasitic bacteria;phylogeny;pusule;ventral connective
PY - 2010
Y1 - 2010
N2 - The external and internal ultrastructure of the harmful unarmored dinoflagellate Cochlodinium polykrikoides Margalef has been examined with special reference to the apical groove and three-dimensional structure of the flagellar apparatus. The apical groove is U-shaped and connected to the anterior sulcal extension on the dorsal side of the epicone. The eyespot is located dorsally and composed of two layers of globules situated within the chloroplast. A narrow invagination of the plasma membrane is associated with the eyespot. The nuclear envelope has normal nuclear pores similar to other eukaryotes but different from the Gymnodinium group with diagnostic nuclear chambers. The longitudinal and transverse basal bodies are separated by approximately 0.5-1.0 µm and interconnected directly by a striated basal body connective and indirectly by microtubular and fibrous structures. Characteristic features of the flagellar apparatus are as follows: (1) a nuclear extension projects to the R1 (longitudinal microtubular root) and is connected to the root by thin fibrous material; (2) fibrillar structures are associated with the longitudinal and transverse flagellar canal; and (3) a striated ventral connective extends toward the posterior end of the cell along the longitudinal flagellar canal. We conclude, based on both morphological and molecular evidence, that Cochlodinium is only distantly related to Gymnodinium.
AB - The external and internal ultrastructure of the harmful unarmored dinoflagellate Cochlodinium polykrikoides Margalef has been examined with special reference to the apical groove and three-dimensional structure of the flagellar apparatus. The apical groove is U-shaped and connected to the anterior sulcal extension on the dorsal side of the epicone. The eyespot is located dorsally and composed of two layers of globules situated within the chloroplast. A narrow invagination of the plasma membrane is associated with the eyespot. The nuclear envelope has normal nuclear pores similar to other eukaryotes but different from the Gymnodinium group with diagnostic nuclear chambers. The longitudinal and transverse basal bodies are separated by approximately 0.5-1.0 µm and interconnected directly by a striated basal body connective and indirectly by microtubular and fibrous structures. Characteristic features of the flagellar apparatus are as follows: (1) a nuclear extension projects to the R1 (longitudinal microtubular root) and is connected to the root by thin fibrous material; (2) fibrillar structures are associated with the longitudinal and transverse flagellar canal; and (3) a striated ventral connective extends toward the posterior end of the cell along the longitudinal flagellar canal. We conclude, based on both morphological and molecular evidence, that Cochlodinium is only distantly related to Gymnodinium.
U2 - 10.1111/j.1550-7408.2010.00491.x
DO - 10.1111/j.1550-7408.2010.00491.x
M3 - Journal article
SN - 1066-5234
VL - 57
SP - 308
EP - 321
JO - Journal of Eukaryotic Microbiology
JF - Journal of Eukaryotic Microbiology
IS - 4
ER -