Synaptonemal complexes as evidence for meiosis in the life cycle of the monomorphic diplokaryotic microsporidium Paranosema grylli |
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| Authors: | Elena S Nassonova Alexey V Smirnov |
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| Institution: | aLaboratory of Cytology of Unicellular Organisms, Institute of Cytology, Russian Academy of Sciences, Tikhoretsky Avenue 4, 194064 St. Petersburg, Russia;bFaculty of Biology and Soil Sciences, St. Petersburg State University, Universitetskaja nab. 7/9, 199034 St. Petersburg, Russia |
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| Abstract: | Characteristic configurations of the nuclei and synaptonemal complexes, indicative of the onset of meiosis, were observed in the meronts of the monomorphic diplokaryotic microsporidium, Paranosema grylli. This finding indicates that a process similar to the meiosis previously reported in polymorphic and some monomorphic monokaryotic microsporidia probably occurs in the development of P. grylli. It is the first evidence for the possible presence of a sexual phase in the life cycle of this microsporidium, which for a long time has been considered asexual. |
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| Keywords: | Diplokaryon Meiosis Microsporidia Paranosema grylli Synaptonemal complexes Ultrastructure |
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