کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1590116 | 1002026 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: In situ comparative studies on subnucleolar distribution and configuration of plant rDNA In situ comparative studies on subnucleolar distribution and configuration of plant rDNA](/preview/png/1590116.png)
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.
Journal: Micron - Volume 39, Issue 4, June 2008, Pages 405–410