ISSN:
1432-0878
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Developing cilia and non-ciliated centrioles are both present in the rat choroid cell studied with the electron microscope. The development of the cilium begins with the appearance of a thick-walled vesicle close to the centriole or in contact with it. Very soon this vesicle lines the distal extremity of the centriole. The growing ciliary shaft invaginates the vesicle, forming a temporary ciliary sheath. This sheath isolates the growing cilium from its environment. Degenerating ciliary shafts are by no means rare. They are interpreted as evidence of a biological cycle of the cilia. Club-shaped forms are also frequent. Non-ciliated centrioles are sometimes in contact with striated structures consisting of alternating dark and light bands, separated by a distance of 600 Å. These formations (treillis) are different from the “pericentriolar satellites”. On morphological grounds, they might be considered as centriole precursors.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00326560
