ANNULATE LAMELLAE AND "YOLK NUCLEI" IN OOCYTES OF THE DRAGONFLY, LIBELLULA PULCHELLA
نویسندگان
چکیده
منابع مشابه
Annulate Lamellae and "yolk Nuclei" in Oocytes of the Dragonfly, Libellula Pulchella
Annulated membranes in the form of single and short lamellae are present adjacent to and parallel to the nuclear envelope in oogonia and early oocyte (synaptene) stages of the dragonfly, Libellula pulchella. These solitary and short annulate lamellae are usually continuous with long, part rough- and part smooth-surfaced cisternae which extend into more distal areas of the oogonial ooplasm. Thes...
متن کاملObservations on the Annulate Lamellae of Immature Amphibian Oocytes
Electron microscopy has established the existence of a complex membranous-bound system of cavities, the endoplasmic reticulum, in the cytoplasm of numerous cells (1). By means of the same technique, what may be parts of another cytoplasmic organelle, the annulate lamellae (2), has also been discovered. These usually consist of a number of parallel, double-membraned sheets, each of which structu...
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Electron microscope studies were made on various tunicate oocytes at different stages of growth and development. Both the inner and outer lamellae of the perforated nuclear envelope demonstrate considerable blebbing activity. The blebs of the inner lamella detach into the nucleoplasm where they undergo a special type of fusion process resulting in the formation of numerous, usually single, diff...
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Annulate lamellae (AL) are a membranous structure frequently observed in differentiating gametes and tumor cells. In spite of numerous morphological studies, the function and biochemical composition of this membrane system are not well understood. In this study, we have examined the AL membrane system of vinblastine-treated mouse L cells using immunocytochemistry and Western blot analysis. Our ...
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Certain lamellar structures have been described from snail (Otala) and clam (Spisula) oocytes, the acinar cells of amphibian (Ambystoma) pancreas, and from rat spermatids. These structures are alike in possessing numerous rings or annuli, resembling those in the nuclear membrane. Thus the name "annulate lamellae" has been proposed for them. It is suggested that they may function in the transfer...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 1969
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.42.1.185