Nucleolar organizer activity in wheat, rye and derivatives analyzed by a silver-staining procedure

Chromosoma ◽  
1984 ◽  
Vol 89 (5) ◽  
pp. 370-376 ◽  
Author(s):  
M. C. Cerme�o ◽  
J. Orellana ◽  
J. L. Santos ◽  
J. R. Lacadena
Keyword(s):  
Silver Staining ◽  
Nucleolar Organizer ◽  
Staining Procedure ◽  
Nucleolar Organizer Activity ◽  
Organizer Activity

Nucleolar organizer competition in Aegilops–rye hybrids

1985 ◽  
Vol 27 (4) ◽  
pp. 479-483 ◽  
Author(s):  
M. C. Cermeño ◽  
J. R. Lacadena
Keyword(s):  
Secale Cereale ◽  
Silver Staining ◽  
Nucleolar Organizer ◽  
Nucleolus Organizer ◽  
Staining Procedure ◽  
Nucleolar Activity ◽  
Nucleolar Organizer Activity ◽  
Organizer Activity ◽  
Chromosome 1R

The nucleolar organizer activity in several Aegilops × rye hybrids (A. triuncialis × Secale cereale, A. variabilis × S. cereale, A. biunicialis × S. cereale, A. biuncialis × S. vavilovii, A. juvenalis × S. cereale) is analyzed by using a highly reproducible silver-staining procedure. The 1U and 5U chromosomes show a strong nucleolar activity, suppressing the NOR activity of chromosome 1R from rye in all the hybrid combinations (UCR, USvR, UMbR, UMbRv, and UMjDR). The nucleolus organizer chromosomes from the genomes C, Sv, Mb, and Mj show small activities. Our results confirm previous data of the nucleolar organizer activity predominant status of the 1U and 5U chromosomes from the U genome (A. umbellulata) and the weakest condition of the 1R chromosome from rye. A diagram showing the relationships between the nucleolar organizer activities of chromosomes from different genomes of Triticeae is presented.Key words: nucleolar competition, amphiplasty, Ag-NORs, Triticeae, Aegilops, Secale.

Nucleolar organizer activity at meiosis in wheat–rye hybrid plants

1986 ◽  
Vol 28 (2) ◽  
pp. 227-234 ◽  
Author(s):  
N. Cuñado ◽  
M. C. Cermeño ◽  
J. Orellana
Keyword(s):  
Silver Staining ◽  
Staining Method ◽  
Nucleolar Organizer ◽  
The Other ◽  
Nucleolar Organizer Regions ◽  
Binucleate Cells ◽  
Hybrid Plants ◽  
Nucleolar Organizer Activity ◽  
Silver Staining Method ◽  
Organizer Activity

Nucleoli and nucleolar organizer regions (NORs) have been studied by a silver staining method in all meiotic stages of wheat–rye hybrid plants. The maximum number of nucleoli per cell scored at meiotic prophase and tapetum binucleate cells indicates that only the NORs of 1B, 6B, and 5D wheat chromosomes are active, whereas that of chromosome IR (SAT) of rye is inactive. However, at diakinesis, metaphase and anaphase meiotic stages only chromosomes 1B and 6B show Ag-NOR as was reported previously in somatic metaphase. The absence of Ag-NOR on chromosome 5D has been imputed to its low nucleolar organizer activity, not detectable by silver staining, because of the small number of rDNA clusters it carries. On the other hand, the meiotic behaviour of chromosomes 1B and 6B has been studied at metaphase I and anaphase I, using the Ag-NORs as cytological markers.Key words: nucleolar organizer, Ag-NOR, meiosis, wheat–rye hybrids.

Variation in nucleolar organizer activity in lymphocytes of females with adenocarcinoma

2008 ◽  
Vol 19 (3) ◽  
pp. 145-148 ◽  
Author(s):  
D. M. Cheng ◽  
T. E. Denton ◽  
S. L. Liem ◽  
C. L. Elliot
Keyword(s):  
Nucleolar Organizer ◽  
Nucleolar Organizer Activity ◽  
Organizer Activity

Estimation of nucleolar organizer activity in tumor cells from patients with esophageal and gastric carcinoma

1985 ◽  
Vol 99 (4) ◽  
pp. 511-513 ◽  
Author(s):  
N. N. Mamaev ◽  
N. V. Bebiya ◽  
S. E. Mamaeva ◽  
I. A. Chalisov ◽  
I. V. Bykhovets
Keyword(s):  
Gastric Carcinoma ◽  
Tumor Cells ◽  
Nucleolar Organizer ◽  
Nucleolar Organizer Activity ◽  
Organizer Activity

scholarly journals Nucleolar organizer activity and competition in Tricepiro Don René INTA, a synthetic forage crop

Caryologia ◽  
2006 ◽  
Vol 59 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Ferrari Maria Rosa ◽  
Maia Fradkin ◽  
Eduardo Josè Greizerstein ◽  
Carlos Alberto Naranjo ◽  
Lidia Poggio
Keyword(s):  
Nucleolar Organizer ◽  
Forage Crop ◽  
Nucleolar Organizer Activity ◽  
Organizer Activity
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