DISTRIBUTION AND TRANSCRIPTION ACTIVITY OF NUCLEOLAR DNA IN HIGHER PLANT CELLS

By using the NAMA-Ur DNA selective staining method, we have observed in situ the location of nucleolar DNA in onion cells and found it at the boundary between fibrillar centres (FC) and dense fibrillar component (DFC) in transcriptionally active nucleolus. We have also used anti-NOR serum, which is...

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Published in:Cell biology international 2001-11, Vol.25 (11), p.1167-1171
Main Authors: Tao, W., Xu, W., Valdivia, M.M., Hao, S., Zhai, Z.H.
Format: Article
Language:English
Subjects:
Alllium cepa
Cell Nucleolus - physiology
Cell Nucleolus - ultrastructure
DNA, Plant - physiology
location of nucleolar DNA in situ
nucleolus
Onions - genetics
Onions - physiology
Onions - ultrastructure
RNA Polymerase I transcription factor (UBF)
transcription sites of rRNA genes
Transcription, Genetic - physiology
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container_issue 11
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container_title Cell biology international
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creator Tao, W.
Xu, W.
Valdivia, M.M.
Hao, S.
Zhai, Z.H.
description By using the NAMA-Ur DNA selective staining method, we have observed in situ the location of nucleolar DNA in onion cells and found it at the boundary between fibrillar centres (FC) and dense fibrillar component (DFC) in transcriptionally active nucleolus. We have also used anti-NOR serum, which is identified as the RNA Polymerase I transcription factor (UBF) antibody, to study its reactivity with higher plant cells and demonstrated this factor associated to the DFC but not present at the interior of FC. Finally, by employing anti-DNA/RNA hybrid antibodies, we labeled the transcriptionally active rRNA genes in active nucleolus and testified that at the boundary between FC and DFC. The results provide the evidence that the boundary between FC and DFC is the genuine transcription site of rRNA genes in nucleolus.
doi_str_mv 10.1006/cbir.2001.0791
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subjects Alllium cepa
Cell Nucleolus - physiology
Cell Nucleolus - ultrastructure
DNA, Plant - physiology
location of nucleolar DNA in situ
nucleolus
Onions - genetics
Onions - physiology
Onions - ultrastructure
RNA Polymerase I transcription factor (UBF)
transcription sites of rRNA genes
Transcription, Genetic - physiology
title DISTRIBUTION AND TRANSCRIPTION ACTIVITY OF NUCLEOLAR DNA IN HIGHER PLANT CELLS
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