caa a22 4500 469082917 CHVBK 20180323132956.0 cr unu---uuuuu 170328e19920201xx s 000 0 eng 10.1007/BF00302972 doi (NATIONALLICENCE)springer-10.1007/BF00302972 Ultrastructural changes in primordial germ cells during early gonadal development of the common carp ( Cyprinus carpio L., teleostei) [Elektronische Daten] [A. van Winkoop, G. Booms, G. Dulos, L. Timmermans] Summary: A description is given of primordial germ cell (PGC) differentiation and gonadal development in carp from hatching until the age of 6 weeks. This period was chosen as the PGCs are mitotically silent before they start to proliferate rapidly after week 6. The PGCs increased in size between week 2 and week 4 after fertilization. Ultrastructurally, the perinuclear dense bodies present in PGCs from hatching onwards increased in size and formed the ‘cement' between mitochondria. Moreover, from week 2 onwards, an elaborate Golgiapparatus was present in PGCs, indicating synthetic activity that may be related to PGC enlargement. During the observation period, gonadal tissue was gradually formed around the PGCs. From the age of 4 and 5 weeks onwards, two somatic cell types could be distinguished; the central type had a light appearance and was closely associated with the PGCs, the other type being darker and forming the peripheral layer of the developing gonads. Thus, during the period of mitotic quiescence, the PGCs and the gonads actively differentiate in preparation for the fast PGC proliferation that occurs after 6 weeks. Springer-Verlag, 1992 Primordial germ cell nationallicence Ultrastructure nationallicence Gonadal differentiation nationallicence Cyprinus carpio (Teleostei) nationallicence van Winkoop A. Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, NL-6709 PG, Wageningen, The Netherlands aut Booms G. Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, NL-6709 PG, Wageningen, The Netherlands aut Dulos G. Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, NL-6709 PG, Wageningen, The Netherlands aut Timmermans L. Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, NL-6709 PG, Wageningen, The Netherlands aut Cell and Tissue Research Springer-Verlag 267/2(1992-02-01), 337-346 0302-766X 267:2<337 1992 267 441 https://doi.org/10.1007/BF00302972 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00302972 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- van Winkoop A. Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, NL-6709 PG, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- Booms G. Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, NL-6709 PG, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- Dulos G. Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, NL-6709 PG, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- Timmermans L. Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, NL-6709 PG, Wageningen, The Netherlands aut NATIONALLICENCE 773 0- Cell and Tissue Research Springer-Verlag 267/2(1992-02-01), 337-346 0302-766X 267:2<337 1992 267 441 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer