Stages of meiosis from the bluebell Endymion non-scriptus (L.) were studied by electron microscopy. The segregated components of the nucleolus at meiotic prophase underwent fragmentation and dissolution at pachytene-diplotene. Nucleoli were absent during both meiotic divisions and reformed on the nucleolus organizer into a fibrillar mass from scattered fibrillar components at the dyad and tetrad stages. Ti is argued that the fibrillar region shows continuity through nuclear division though undergoing structural transformations in the process. Nucleolar reformation occurs on condensed nucleolus organizers. Processing of the ribosomal precursors and the resumption of RNA synthesis is discussed in relation to the dispersal of the nucleolus organizer into the fibrillar region of the reformed nucleolus.
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JOURNAL ARTICLE| 01 June 1977
The nucleolus and meiosis during microsporogenesis in Endymion non-scriptus (L.)
Online Issn: 1477-9137
Print Issn: 0021-9533
© 1977 by Company of Biologists
J Cell Sci (1977) 25 (1): 111–123.
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B.T. Luck, E.G. Jordan; The nucleolus and meiosis during microsporogenesis in Endymion non-scriptus (L.). J Cell Sci 1 June 1977; 25 (1): 111–123. doi: https://doi.org/10.1242/jcs.25.1.111
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