A study of the cytoplasmic structures in the male germinal cells of several species of notonecta, with special reference to the golgi system

1940 ◽  
Vol 67 (3) ◽  
pp. 489-521 ◽  
Author(s):  
Kenneth M. Richter
Keyword(s):  
Special Reference ◽  
Golgi System ◽  
Cytoplasmic Structures ◽  
Germinal Cells

Further Observations on the Fine Structure of Chrysochromulina Chiton With Special Reference to the Haptonema, ‘Peculiar’ Golgi Structure and Scale Production

1967 ◽  
Vol 2 (2) ◽  
pp. 265-272
Author(s):  
IRENE MANTON
Keyword(s):  
Fine Structure ◽  
Special Reference ◽  
Internal Structure ◽  
Similar Species ◽  
Scale Production ◽  
Related Genus ◽  
Fixation Methods ◽  
Close Resemblance ◽  
Golgi System ◽  
Golgi Structure

A more detailed study of ‘peculiar’ Golgi structure in this organism has been attempted than in any similar species, using modern fixation methods. Where comparisons are possible there is close resemblance to the related genus Prymnesium, to a degree sufficient to suggest that this particular type of Golgi system is likely to be a major phyletic indicator for the class Haptophyceae. Certain stages of scale production have been traced and some developmental aspects of the whole system are discussed, though full interpretation is deferred. Some additional features of haptonema structure are described for the sake of completeness in characterizing the particular strain of the species under investigation. These include information on the internal structure of the haptonema tip.

Golgi Apparatus and Melanogenesis: Ultrastructural Study of a Human Cellular Blue Nevus (Melanocytoma)

1973 ◽  
Vol 31 ◽  
pp. 380-381
Author(s):  
S.R. Allegra
Keyword(s):  
Endoplasmic Reticulum ◽  
Golgi Apparatus ◽  
Ultrastructural Study ◽  
The Other ◽  
Blue Nevus ◽  
Normal Complement ◽  
Golgi Vesicles ◽  
Golgi System ◽  
The Subject ◽  
Cellular Blue Nevus

The respective roles of the ribo somes, endoplasmic reticulum, Golgi apparatus and perhaps nucleus in the synthesis and maturation of melanosomes is still the subject of some controversy. While the early melanosomes (premelanosomes) have been frequently demonstrated to originate as Golgi vesicles, it is undeniable that these structures can be formed in cells in which Golgi system is not found. This report was prompted by the findings in an essentially amelanotic human cellular blue nevus (melanocytoma) of two distinct lines of melanocytes one of which was devoid of any trace of Golgi apparatus while the other had normal complement of this organelle.

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