Ultrastructure of the Gregarina Niphandrodes Nucleus Through Stages from Unassociated Trophozoites to Gamonts in Syzygy and the Syzygy Junction.
From: School of Biological Sciences, Washington State University, Pullman, Washington 99164-4236, USA.
The Journal of parasitology
- Publish Date: Jun 2007
- ISSN: 0022-3395
- Volume: 93
- Issue: 3
- Pages: 479-84
- Medium: Print
- Language: English
- Citation (JAMA): Toso Marc A, Omoto Charlotte K, et al. Ultrastructure of the Gregarina Niphandrodes Nucleus Through Stages from Unassociated Trophozoites to Gamonts in Syzygy and the Syzygy Junction.. J. Parasitol. Jun 2007;93:479-84
Abstract
In Gregarina niphandrodes, an apicomplexan parasite, the sexual stage of its life cycle begins with the association of 2 gamonts. Here, we describe the ultrastructure of the syzygy junction and the nucleus during the transition from unassociated trophozoites to paired gamonts to gamonts in syzygy. Throughout this process, the folds within the syzygy junction undergo changes that correspond to changes of the epicytic folds. The nucleus goes through dramatic changes from multiple spheres of condensed chromatin in unassociated trophozoites, to mostly uncondensed chromatin in paired gamonts, to a large single sphere of condensed chromatin encasing many smaller spheres in gamonts in syzygy. These differing nuclear ultrastructures reflect the dramatic cellular and transcriptional changes associated with life cycle transitions and are indicative of the numerous cell divisions that follow.
Mesh Headings (Keywords): Animals, Apicomplexa, Cell Nucleus, Life Cycle Stages, Microscopy, Electron, Transmission, Tenebrio
Check for Full Text / PubMed Unique Identifier (PMID): 17626337
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