Characterization of the life cycle and heteromeric nature of the macronucleus of the ciliate Chilodonella uncinata using fluorescence microscopy.

Characterization of the life cycle and heteromeric nature of the macronucleus of the ciliate Chilodonella uncinata using fluorescence microscopy.
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DOI:
10.1111/jeu.12109
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发表时间:
2014-05
期刊:
The Journal of eukaryotic microbiology
影响因子:
--
通讯作者:
Katz LA
Katz LA
中科院分区:
其他
文献类型:
--
作者:
Bellec L;Maurer-Alcala XX;Katz LA

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关于非模式纤毛虫生活史的研究很少,如棉铃虫。关于这一分类群的少数论文表明,存在一个异构体大核,其特点是DNA丰富区和DNA贫乏区分开。在这里,我们使用激光共聚焦扫描显微镜结合DAPI染色来研究钩吻线虫的生活史,这使得我们能够区分生活周期阶段的微核和大核的核动力学。我们用照片记录了新的大核发育的不同阶段,并确认了以前用电子显微镜表征的各个方面。我们通过Z-堆栈和3D重建进一步揭示了大核的异构体结构。在营养生长过程中,我们没有发现在大核中心存在内小体的证据。除了说明这种纤毛虫的生命周期外,为这项研究开发的方法还将使使用荧光显微镜对核动力学进行额外的比较分析成为可能。
Only a limited number of studies exist on the life cycles of non-model ciliates such as Chilodonella uncinata (Cl: Phyllopharyngea). The handful of papers on this taxon indicates the presence of a heteromeric macronucleus, marked by separate DNA rich and DNA poor regions. Here, we study the life cycle of C. uncinata using confocal laser scanning microscopy with DAPI staining, which allows us to differentiate nuclear dynamics of the micronucleus and the macronucleus during life cycle stages. We photo-documented various stages and confirm aspects of the development of the new macronucleus previously characterized by electron microscopy. We further reveal the heteromeric structure of the macronucleus with Z-stacks and 3D reconstructions. We find no evidence for the presence of an endosome at the center of the macronucleus during vegetative growth. In addition to illustrating the life cycle of this ciliate, the approaches developed for this study will enable additional comparative analyses of nuclear dynamics using fluorescence microscopy.
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