ISSN:
1749-6632
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Natural Sciences in General
Notes:
During the last several years, the study of the nucleolus and, more specifically, its structure has been the object of much research.1 The observation of the state of the nucleolus, its composition, and its spatial organization allows us to appreciate the synthesis and metabolism of ribonucleic acids (rRNA).Vacuoles have been observed in the nucleolus in some cells, such as those of cotton fibers2 the embryonic root cells of Zea Mays,3 tobacco cells,4 and so on. This is also the case in oocytes, for instance, in Xenopus5 and in the teleost fish, Xiphophorus helleri.6 The rat oocytes from antral follicle often have germinal vesicles possessing spherical inclusions. With mature rats, Tsafiri and Kraicer7 have noticed these formations in 91% of the nucleoli. We have also found them in nearly all oocytes from adult rats, but not in those from prepubertal untreated rats.8 Bomsel-Helmreich et al.9 have published illustrations showing that these cavities can be clearly distinguished at the interior of very large nucleoli belonging to human oocytes in mature ovarian follicles.To our knowledge, the origin, development and significance of these nucleolar vesicles have not yet been established with certainty.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1749-6632.1985.tb37507.x
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