Abstract
Some aspects of both the nucleolar organizer activity and meiosis were studied in the testes of Triatoma vitticeps (Heteroptera, Triatominae). The techniques used included squashing followed by lacto-acetic orcein staining, silver-ion impregnation, fluorescent banding (CMA3, Quinacrine mustard and DAPI) and fluorescent in situ hybridization (FISH). A close relationship between heterochromatin and nucleolus in testicular cells was observed. During meiosis, the silver-ion impregnation pattern varied. At metaphase plate, a small body appeared apart from the chromosomes. In the spermatids this small body was seen in preparations stained with orcein and silver- ion impregnation but not with fluorochromes or FISH. These characteristics combined suggest that these corpuscles represent a source of ribonucleoproteins (RNP) – RNA and specific nucleolar proteins. Silver-ion impregnation and (FISH) revealed nucleolar organizer activity in two metaphase sex chromosomes (X). These results indicate that, in these species, nucleolar organizer regions (NORs) are located in the sex chromosomes, X chromosomes were CMA +3 and Y chromosome was DAPI+.
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References
M. Ashraf M.B.E. Godward (1988) ArticleTitleUltrastructural study of nucleolus reorganization in telophase in a green alga Cytologia 53 447–456
M.T.V. Azeredo-Oliveira (1990) ArticleTitleCytogenetic study in the malpighian tubules, salivary glands and testes of triatomines (triatominae, Heteroptera) Revista Brasileira de Genética (Braz. J. Genetics) 13 640–642
R. Barth (1956a) ArticleTitleEstudos anatômicos e histológicos sobre a subfamília Triatominae. (Heteroptera, Reduviidae), V parte: Anatomia do testículo e espermiocitogênese do Triatoma infestans Memórias do lnstituto Oswaldo Cruz 54 599–624 Occurrence Handle1:STN:280:CyiD1MjptlI%3D
R. Barth (1956b) ArticleTitleEstudos anatômicos e histológicos sobre a subfamíla Triatominae (Hemiptera, Reduviidae). VI parte Estudo comparativo sobre a espermiogênese das espécies mais importantes Memórias do Instituto Oswaldo Cruz 54 599–616 Occurrence Handle1:STN:280:CyiD1MjptlI%3D
H.E.M.C. Bicudo L. Madi-Ravazzi S. Nanya (1992) ArticleTitleSimplified Ag-staining technique for nucleolar organizing regions and nucleoli Rev. Bras. Gen. 15 199–200
E.S. Vaio ParticleDe B. Grucci A.M. Castagnino (1985) ArticleTitleMeiotic differences between three triatomines species (Hemiptera, Reduviidae) Genetica, Netherlands 67 185–191
D. Frias J. Atria (1998) ArticleTitleChromosomal variation, macroevolution and possible apatric speciation in Mepraia spinolai (porter) (Hemiptera: Reduviidae) Genetics and Molec. Biol 21 179–184
J.G. Gall M.L. Pardue (1969) ArticleTitleFormation and detection of RNA-DNA hybrid molecules in cytological preparations Genetics 63 378–83 Occurrence Handle1:CAS:528:DyaF1MXkvVygsbs%3D
C. Goodpasture S.E. Bloom (1975) ArticleTitleVisualization of nucleolar organizer regions in mammalian chromosomes using silver staining Chromosoma 53 37–50 Occurrence Handle10.1007/BF00329389 Occurrence Handle1:STN:280:CSmD28rlvVM%3D Occurrence Handle53131
M. Howell D.A. Black (1980) ArticleTitleControlled silver staining of nucleolus organizer regions with protective colloidal developer: I-step method Experientia 36 104–105 Occurrence Handle10.1007/BF01953855
H.A. John M.L. Birstiel K.W. Jones (1969) ArticleTitleRNA-DNA hybrids at the cytological level Nature 223 582–87 Occurrence Handle1:CAS:528:DyaF1MXltF2ltr4%3D Occurrence Handle5799530
H.C. Mac Gregor (1993) An introduction to animal cytogenetics Chapman and Hall London
M.L.S. Mello (1995) ArticleTitleRelocation of RNA metachromasy at mitosis Acta Histochem. Cytochem. 28 149–154
C. Mirre B. Knibiehler (1985) ArticleTitleUltrastructural and functional variations in the spermatid nucleolus during spermiogenesis in the mouse Cell Diffn 16 51–61 Occurrence Handle1:STN:280:BiqC2snpvFc%3D
A. Morielle M.T.V. Azeredo-Oliviera (2004) ArticleTitleDescription of the nucleolar activity and karyo type in germanitive cell lines of Rhodnius Domesticus (Triatominae, Heteroptera) Caryologia 57 IssueID1 31–37
A. Morielle (2000) ArticleTitleStudy of the spermatogenesis in triatomines of genus Rhodnius (Heteroptera, Triatominae) with emphasis on nucleolar activity Genetics and Molecular Biology 23 502–503
Parvinen, M., K.K. Vihko & J. Toppari, 1986. Cell Interactions during the seminiferous epithelial cycle. __Cytology: A survey of cell biology. 3 editor Academic Press, New York, 104: 115–151.
E. Petitpierre (1996) ArticleTitleMolecular cytogenetics and taxonomy of insects, with particular reference to the Coleoptera Int. J. Insect Morphol. & Embriol. 25 115–136
M. Schimid (1980) ArticleTitleChromosoma banding an amphibia IV. Differentiation of GC and AT rich regions in Anura Chromosoma 77 83–103
G. Schreider J. Pellegrino (1950) ArticleTitleEteropicnosi di autosomi come possible mecanismo di speciazione Scientia Genética 3 215–226
D. Schweizer W. Nagl (1976) ArticleTitleHeterochromatin diversity in Cybidium, and its relationship to differential DNA replication Exp. Cell. Res. 111 327–32
A.J. Solari (1979) ArticleTitleAutosomal synaptonemal complex and sex chromosomes without axes in Triatoma infestans (Reduviidae, Hemiptera) Chromosoma 72 225–240 Occurrence Handle10.1007/BF00293236
A.T. Sumner (1990) Chromosome banding Unwin Hyman London
E. Tartarotti M.T.V. Azeredo-Oliveira (1999) ArticleTitleMeiosis patterns of holocentric chromosomes in triatomines genus Panstrongylus Cytologia 64 235–240
M. Tavares M.T.V. Azeredo-Oliveira (1997) ArticleTitleCytogenetics study on holocentric chromosomes of five species of triatomines (Heteroptera: Reduviidae) Cytobios 89 51–61
B.C. Vidal M.L.S. Mello (1987) Biologia Celular Atheneu Rio de Janeiro 29
E. Viegas-Péquignot (1992) In situ Hibridization to chromosomes with biotinylated probes d. Willernson (Eds) In situ hybridization: a pratical approach Oxford University Press, IRL Press Oxford 137–158
N. Ueshima (1966) ArticleTitleCytotaxonomy of the Triatominae (Reduviidae, Hemiptera) Chromosoma 18 97–122 Occurrence Handle10.1007/BF00326447
N. Ueshima (1979) Hemiptera II: Heteroptera. Animal Cytogenetics Gebrüder Bormtraeger Berlin 1–117
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Severi-Aguiar, G.D.C., Lourenço, L.B., Bicudo, H.E.M.C. et al. Meiosis Aspects and Nucleolar Activity in Triatoma vitticeps (Triatominae, Heteroptera). Genetica 126, 141–151 (2006). https://doi.org/10.1007/s10709-005-1443-2
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DOI: https://doi.org/10.1007/s10709-005-1443-2