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| Silva, Silvana do Nascimento; UESB; Carvalho, Andre Mauricio Vieira de; CEPLAC; Santos, Francisco de Assis Ribeiro dos; UEFS. |
| Este trabalho consistiu no levantamento do táxon Cestrum em Mata Higrófila do sul e extremo sul do Estado da Bahia. Foram encontradas 12 espécies: C. amictum Schltdl., C. coriaceum Miers, C. laevigatum Schltdl., C. lanceolatum Schott ex Sendtn, C. martii Sendtn, C. megalophyllum Dunal, C. parqui L`Hér., C. retrofractum Dunal, C. salzmannii Dunal, C. schlechtendahlii G. Don, C. sendtenerianum Mart. ex Sendtn e C. viminale Sendtn. São apresentadas chaves de identificação, descrições e ilustrações de algumas espécies, além de dados de distribuição geográfica, floração e frutificação |
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Palavras-chave: 2.01.00.00-0 Biologia Geral Florística; Mata Higrófila; Cestrum; Bahia; Brasil 2.01.00.00-0 Biologia Geral. |
| Ano: 2003 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2112 |
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| Guarido,Paula Carolina Paes; Paula,Adriano Alves de; Silva,Carlos Roberto Maximiano da; Rodriguez,Carmen; Vanzela,André Luís Laforga. |
| Heterochromatin comprises a fraction of the genome usually with highly repeated DNA sequences and lacks of functional genes. This region can be revealed by using Giemsa C-banding, fluorochrome staining and cytomolecular tools. Some plant species are of particular interest through having a special type of heterochromatin denominated the cold-sensitive region (CSR). Independent of other chromosomal regions, when biological materials are subjected to low temperatures (about 0 °C), CSRs appear slightly stained and decondensed. In this study, we used Cestrum strigilatum (Solanaceae) to understand some aspects of CSR condensation associated with cytosine methylation levels, and to compare the behavior of different heterochromatin types of this species, when... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anti-5-methylcytosine; Cestrum; Chromosomes; CMA/DAPI banding; Heterochromatin; Immunolabeling. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000300012 |
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| Fregonezi,Jéferson Nunes; Fernandes,Thiago; Torezan,José Marcelo Domingues; Vieira,Ana Odete S.; Vanzela,André Luís Laforga. |
| We studied the karyotypes of four Brazilian Cestrum species (C. amictum, C. intermedium, C. sendtnerianum and C. strigilatum) using conventional Feulgen staining, C-Giemsa and C-CMA3/DAPI banding, induction of cold-sensitive regions (CSRs) and fluorescent in situ hybridization (FISH) with rDNA probes. We found that the karyotypes of all four species was 2n = 2x = 16, with, except for the eighth acrocentric pair, a predominance of meta- and submetacentric chromosomes and various heterochromatin classes. Heterochromatic types previously unreported in Cestrum as neutral C-CMA3(0)/DAPI0 bands, CMA3+ bands not associated with NORs, and C-Giemsa/CSR/DAPI- bands were found. The heterochromatic blocks varied in size, number, position and composition. The 45S rDNA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cestrum; Chromosome banding; CSRs; Karyotype evolution; RDNA probes. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100019 |
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| Fernandes,Thiago; Rego,Letícia do Nascimento Andrade de Almeida; Nardy,Mariana; Yuyama,Priscila Mary; Vanzela,André Luís Laforga. |
| The karyotypes of four South American species of Cestrum (C. capsulare, C. corymbosum, C. laevigatum and C. megalophylum) were studied using conventional staining, C-CMA/DAPI chromosome banding and FISH with 45S and 5S rDNA probes. The karyotypes showed a chromosome number of 2n = 2x = 16, with metacentric chromosomes, except for the eighth submeta- to acrocentric pair. Several types of heterochromatin were detected, which varied in size, number, distribution and base composition. The C-CMA+ bands and 45S rDNA were located predominantly in terminal regions. The C-CMA+/DAPI+ bands appeared in interstitial and terminal regions, and the C-DAPI+ bands were found in all chromosome regions. The 5S rDNA sites were observed on the long arm of pair 8 in all species... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cestrum; Chromosome banding; FISH; Heterochromatin; Physical maps; 45S and 5S rDNA. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200019 |
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| Silva, Silvana do Nascimento; UESB; Carvalho, André Mauricio Vieira de; Centro de Pesquisa do Cacau; Santos, Francisco de Assis Ribeiro dos; UEFS. |
| Foram estudados os grãos de pólen de 12 táxons: C. amictum Schltdl., C. coriaceum Miers, C. laevigatum Schltdl., C. lanceolatum Schott ex Sendtn, C. martii Sendtn., C. megalophyllum Dunal, C. parqui L`Hér., C. retrofractum Dunal, C. salzmannii Dunal, C. schlechtendahlii G. Don., C. sendtenerianum Mart. ex Sendtn. e C. viminale Sendtn., coletados na mata higrófila da Bahia, com o objetivo de fornecer uma caracterização morfopolínica das espécies, permitindo algumas considerações taxonômicas. O material polínico foi acetolisado, e os grãos foram examinados em microscópio óptico. Os grãos apresentam tamanho médio, com faixa de variação entre 20,0 e 50,0µm; quanto à forma, as espécies apresentaram grãos de pólen oblatos esferoidais a subprolatos;... |
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Palavras-chave: 2.01.00.00-0 Biologia Geral grãos de pólen; Cestrum; Mata higrófila; Bahia Brasil 2.01.00.00-0 Biologia Geral. |
| Ano: 2003 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2035 |
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