Silver Nitrate Staining of Nucleolar Organizer Regions (Ag-NORs) in Plant Chromosomes

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Plant Cytogenetics and Cytogenomics

Part of the book series: Methods in Molecular Biology ((MIMB,volume 2672))

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Abstract

Silver nitrate staining to evidence the location of nucleolar organizer regions (Ag-NORs) in chromosomes is widely used as a classical method in plant cytogenetics. Here, we present the most used procedures and highlight some aspects in terms of their replicability by plant cytogeneticists. Some technical features described are materials and methods used, procedures, protocol modifications, and precautions in order to obtain positive signals. The methods to obtain Ag-NOR signals have different degrees of replicability, but do not require any sophisticated technology or equipment for their application.

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References

  1. Schwarzacher H, Mikelsaar A, Schnedl W (1978) The nature of the Ag-staining of nucleolus organizer regions. Cytogenet Cell Genet 20:24–39

    Article  CAS  PubMed  Google Scholar 

  2. Medina F, Risueño M, Sanchez-Pina M, Fernandez-Gomez M (1983) A study on nucleolar silver staining in plant cells. The role of argyrophilic proteins in nucleolar physiology. Chromosoma 88:149–155

    Article  CAS  Google Scholar 

  3. Cermeño M, Orellana J, Santos J, Lacadena J (1984a) Nucleolar organizer activity in wheat, rye and derivatives analyzed by a silver-staining procedure. Chromosoma 89:370–376

    Article  Google Scholar 

  4. Hubbell H (1985) Silver staining as an indicator of active ribosomal genes. Stain Technol 60:285–294

    Article  CAS  PubMed  Google Scholar 

  5. Carvalho A, Polanco C, Lima-Brito J (2010) Differential rDNA gene expression in hexaploid wheat related to NOR methylation. Plant Mol Biol Repo 28:403–412

    Article  CAS  Google Scholar 

  6. Goodpasture C, Bloom S (1975) Visualization of nucleolar organizer regions in mammalian chromosomes using silver staining. Chromosoma 53:37–50

    Article  CAS  PubMed  Google Scholar 

  7. Kavalco K, Pazza R (2004) A rapid alternative technique for obtaining silver-positive patterns in chromosomes. Genet Mol Biol 27:196–198

    Article  Google Scholar 

  8. Fernández-Gómez E, Stockert J, López-Sáez J, Giménez-Martín G (1969) Staining plant cell nucleoli with AgNO3 after formalin-hydroquinone fixation. Stain Technol 44:48–49

    PubMed  Google Scholar 

  9. Jara-Seguel P, Palma-Rojas C, Contreras J, von Brand E (2012) Chromosome localisation of nucleolar organizer region in Rhodophiala bagnoldii (Herb.) Traub (Asparagales: Amaryllidaceae) determined by silver nitrate staining. Gayana Bot 69:201–203

    Article  Google Scholar 

  10. Pannese E (1999) The Golgi stain: invention, diffusion and impact on neurosciences. J Hist Neurosci 8:132–140

    Article  CAS  PubMed  Google Scholar 

  11. Hizume M, Sato S, Tanaka A (1980) A highly reproducible method of nucleolus organizing regions staining in plants. Stain Technol 55:87–90

    CAS  PubMed  Google Scholar 

  12. Rufas J, Iturra P, de Souza W, Esponda P (1982) Simple silver staining procedures for the location of nucleolus and nucleolar organizer under light and electron microscopy. Arch Biol 93:267–274

    Google Scholar 

  13. Howell W, Black D (1980) Controlled silver-staining of nucleolus organizer regions with a protective colloidal developer: a 1-step method. Experientia 36:1014–1015

    Article  CAS  PubMed  Google Scholar 

  14. Mehra R, Brekrus S, Butler M (1985) A simple two-step procedure for silver staining nucleolus organizer regions in plant chromosomes. Can J Gen Cytol 27:255–257

    Article  Google Scholar 

  15. Olert J, Sawatzki G, Kling H, Gebauer J (1979) Cytological and histochemical studies on the mechanism of the selective silver staining of nucleolus organizer regions (NORs). Histochemistry 60:91–99

    Article  CAS  PubMed  Google Scholar 

  16. De Capoa A, Ferraro M, Lavia P, Pelliccia F, Finazzi-Agro A (1982) Silver staining of the nucleolus organizer regions (NOR) requires clusters of sulfhydryl groups. J Histochem Cytochem 30:908–911

    Article  PubMed  Google Scholar 

  17. Orellana J, Santos J, Lacadena J, Cermeño M (1984) Nucleolar competition analysis in Aegilops ventricosa and its amphiploids with tetraploid wheats and diploid rye by the silver-staining procedure. Can J Gen Cytol 26:34–39

    Article  Google Scholar 

  18. Cermeño M, Orellana J, Santos J, Lacadena J (1984b) Nucleolar activity and competition (Amphiplasty) in the genus Aegilops. Heredity 53:603–611

    Article  Google Scholar 

  19. Santos J, Lacadena J, Cermeño M, Orellana J (1984) Nucleolar organizer activity in wheat-barley chromosome addition lines. Heredity 52:425–429

    Article  Google Scholar 

  20. Lacadena J, Cermeño M, Orellana J, Santos J (1984) Evidence for wheat-rye nucleolar competition (amphiplasty) in triticale by silver-staining procedure. Theor Appl Genet 67:207–213

    Article  CAS  PubMed  Google Scholar 

  21. Roa F, Guerra M (2012) Distribution of 45S rDNA sites in chromosomes of plants: structural and evolutionary implications. BMC Evol Biol 12:225

    Article  CAS  PubMed  PubMed Central  Google Scholar 

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Acknowledgments

Our thanks to the Núcleo de Estudios Ambientales (NEA), and to the Dirección de Investigación, Universidad Católica de Temuco, Chile.

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Correspondence to Pedro Jara-Seguel .

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Palma-Rojas, C., Jara-Seguel, P., Araya-Jaime, C. (2023). Silver Nitrate Staining of Nucleolar Organizer Regions (Ag-NORs) in Plant Chromosomes. In: Heitkam, T., Garcia, S. (eds) Plant Cytogenetics and Cytogenomics. Methods in Molecular Biology, vol 2672. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-3226-0_13

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  • DOI: https://doi.org/10.1007/978-1-0716-3226-0_13

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  • Publisher Name: Humana, New York, NY

  • Print ISBN: 978-1-0716-3225-3

  • Online ISBN: 978-1-0716-3226-0

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