Abstract
The distribution and configurations of nucleolar DNA in Pisum sativum L., Allium sativum L., Triticum aestivum L. were analyzed by specific cytochemical staining using NAMA-Ur. It has been observed that in the nucleoli of different plant species, the DNA occupied different positions in different areas, which may imply a different status and strategy of rDNA transcription. Our results showed irregular clumps of rDNA surrounding FCs in semi-circular formations in P. sativum and T. aestivum, indicating a regular pattern of rDNA distribution and supporting the helix model of rDNA configuration. The rDNA was condensed in some regions and uncondensed in others. Nucleolus-associated chromatin extended from outside the nucleolus to the periphery of the FCs via nucleolar channels, which suggests a possible origin for nucleolar DNA.
| Original language | English |
|---|---|
| Pages (from-to) | 405-410 |
| Number of pages | 6 |
| Journal | Micron |
| Volume | 39 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jun 2008 |
Keywords
- Allium sativum L.
- In situ structure
- Nucleolus
- Nucleus
- Pisum sativum L.
- Triticum aestivum L
- rDNA
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