Sequential study of synaptonemal complexes in mouse spermatocytes by light and electron microscopy |
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Authors: | M Guitart M D Coll M Ponsà J Egozcue |
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Institution: | (1) Department of Cell Biology, Faculty of Science, Campus Universitari, Bellaterra (Barcelona), Spain;(2) Institut de Biologia Fondamental ‘V. Villar Palasi’ da Universitat Autònoma de Barcelona, Campus Universitari, Bellaterra (Barcelona), Spain;(3) Present address: Departament de Biologia Cellular. Facultat de Ciències, Universitat Autònoma de Barcelona, Bellaterra (Barcelona), Spain |
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Abstract: | Synaptonemal complex (SC) studies in male mice from the beginning of meiosis to its completion (7–40 days of age) indicate:
(1) the existence of a leptotene stage with fragmented and completely unpaired axial elements; (2) that synapsis begins at
several different initiation points of the axial elements, resulting in X-shaped and Y-shaped configurations; (3) that interlocking
of axial elements at zygotene is a normal phenomenon; and (4) that zygotene (presynaptic) and diplotene (postsynaptic) configurations
are different from each other.
This investigation received financial support from the special Programme of Research, Development and Research Training in
Human Reproduction, World Health Organization. |
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