Marcelo Guerra
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View article: Fungal Planet description sheets: 1436–1477
Fungal Planet description sheets: 1436–1477 Open
Novel species of fungi described in this study include those from various countries as follows: Argentina , Colletotrichum araujiae on leaves, stems and fruits of Araujia hortorum . Australia , Agaricus pateritonsus on soil, Curvularia fra…
View article: Molecular cytogenetics reveals an uncommon structural and numerical chromosomal heteromorphism in Zephyranthes brachyandra (Amaryllidaceae)
Molecular cytogenetics reveals an uncommon structural and numerical chromosomal heteromorphism in Zephyranthes brachyandra (Amaryllidaceae) Open
Background and aims: Zephyranthes brachyandra belongs to a tribe of ornamental Amaryllidaceae native of South America, whose genera circumscription and phylogenetic relationships are still unclear. Cytologically, Z. brachyandra is a tetrap…
View article: Molecular cytogenetics of Dictyoloma vandellianum A. Juss. and the ancestral karyotype of Rutaceae
Molecular cytogenetics of Dictyoloma vandellianum A. Juss. and the ancestral karyotype of Rutaceae Open
Determination of the chromosome base number of a taxon is fundamental to understanding karyotypic variation and its implications for the evolution of that group. This usually requires careful evaluation of cytological literature and robust…
View article: Molecular cytogenetics of Dictyoloma vandellianum A. Juss. and the ancestral karyotype of Rutaceae
Molecular cytogenetics of Dictyoloma vandellianum A. Juss. and the ancestral karyotype of Rutaceae Open
Determination of the chromosome base number of a taxon is fundamental to understanding karyotypic variation and its implications for the evolution of that group. This usually requires careful evaluation of cytological literature and robust…
View article: Intense proliferation of rDNA sites and heterochromatic bands in two distantly related Cuscuta species (Convolvulaceae) with very large genomes and symmetric karyotypes
Intense proliferation of rDNA sites and heterochromatic bands in two distantly related Cuscuta species (Convolvulaceae) with very large genomes and symmetric karyotypes Open
The genome size varies widely among angiosperms but only a few clades present huge variation at a low phylogenetic level. Among diploid species of the genus Cuscuta the genome size increased enormously in at least two independent lineages:…
View article: Genome size and cytomolecular diversification in two species of the South African endemic genus Tulbaghia L. (Allioideae, Amaryllidaceae)
Genome size and cytomolecular diversification in two species of the South African endemic genus Tulbaghia L. (Allioideae, Amaryllidaceae) Open
Tulbaghia L. is a South African genus of Allioideae, Amaryllidaceae, which includes circa 25 species with similar karyotypes, all of them with 2n = 12 large chromosomes, predominantly metacentric to submetacentric. This karyotype stability…
View article: Intense proliferation of rDNA sites and heterochromatic bands in two distantly related Cuscuta species (Convolvulaceae) with very large genomes and symmetric karyotypes
Intense proliferation of rDNA sites and heterochromatic bands in two distantly related Cuscuta species (Convolvulaceae) with very large genomes and symmetric karyotypes Open
The genome size varies widely among angiosperms but only a few clades present huge variation at a low phylogenetic level. Among diploid species of the genus Cuscuta the genome size increased enormously in at least two independent lineages:…
View article: IAPT chromosome data 31
IAPT chromosome data 31 Open
Fil: Marhold, Karol. Slovak Academy of Sciences. Institute of Botany. Science and Biodiversity Centre. Bratislava, Slovak Republic.
View article: Does the chromosomal position of 35S rDNA sites influence their transcription? A survey on Nothoscordum species (Amaryllidaceae)
Does the chromosomal position of 35S rDNA sites influence their transcription? A survey on Nothoscordum species (Amaryllidaceae) Open
35S ribosomal DNA (rDNA) sites are the regions where the ribosomal genes 18S, 5.8S and 25S, responsible for the formation of the nucleoli, are found. The fact that rDNA sites have non-random distribution on chromosomes suggests that their …
View article: Karyotype of the Neotropical mangrove species <i>Pelliciera Rhizophorae</i> Triana and Planchon (Tetrameristaceae)
Karyotype of the Neotropical mangrove species <i>Pelliciera Rhizophorae</i> Triana and Planchon (Tetrameristaceae) Open
Pelliciera rhizophorae is the sole survivor of the Eocene mangroves inhabiting the Isthmus of Panama. Two populations of Pelliciera rhizophorae, a small morphotype at the Pacific coast and a tall morphotype at the Caribbean coast, display …
View article: Condensation patterns of prophase/prometaphase chromosome are correlated with H4K5 histone acetylation and genomic DNA contents in plants
Condensation patterns of prophase/prometaphase chromosome are correlated with H4K5 histone acetylation and genomic DNA contents in plants Open
Mitotic prophase chromosome condensation plays an essential role in nuclear division being therefore regulated by highly conserved mechanisms. However, degrees of chromatin condensation in prophase-prometaphase cells may vary along the chr…
View article: Agmatoploidy and symploidy: a critical review
Agmatoploidy and symploidy: a critical review Open
Agmatoploidy is a type of chromosome rearrangement that involves the fragmentation of an entire chromosome complement, generating a diploid with double its original chromosome number. Agmatoploidy and other related karyotype changes, such …
View article: Supplementary Material for: Non-Random Distribution of 5S rDNA Sites and Its Association with 45S rDNA in Plant Chromosomes
Supplementary Material for: Non-Random Distribution of 5S rDNA Sites and Its Association with 45S rDNA in Plant Chromosomes Open
5S and 45S rDNA sites are the best mapped chromosome regions in eukaryotic chromosomes. In this work, a database was built gathering information about the position and number of 5S rDNA sites in 784 plant species, aiming to identify patter…
View article: Supplementary Material for: Non-Random Distribution of 5S rDNA Sites and Its Association with 45S rDNA in Plant Chromosomes
Supplementary Material for: Non-Random Distribution of 5S rDNA Sites and Its Association with 45S rDNA in Plant Chromosomes Open
5S and 45S rDNA sites are the best mapped chromosome regions in eukaryotic chromosomes. In this work, a database was built gathering information about the position and number of 5S rDNA sites in 784 plant species, aiming to identify patter…