Comparative cytogenetic analysis of<i>Cestrum</i>(Solanaceae) reveals different trends in heterochromatin and rDNA sites distribution

Paula, Angélica Alves de; Fernandes, Thiago; Vignoli‐Silva, Márcia; Vanzela, André Luís Laforga

doi:10.1080/11263504.2014.969354

Cited by 8 publications

(15 citation statements)

References 31 publications

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“…Species of Cestrum have shown large diversity in the accumulation and distribution of repetitive DNA families [65], and Bs have been described in seven species: C. strigilatum, C. diurnum, C. parqui × C. aurantiacum, C. intermedium, C. parqui, C.…”

Section: Cestrummentioning

confidence: 99%

Evolution of Plant B Chromosome Enriched Sequences

Marques

Klemme

Houben

2018

Preprint

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B chromosomes are supernumerary chromosomes which are found in addition to the normal standard chromosomes (A chromosomes). B chromosomes are well known to accumulate several types of repeats. Although the evolution of B chromosomes has been subject of numerous studies, the mechanisms of accumulation and evolution of repetitive sequences is not fully understood. Recently, new genomic approaches have shed light on the origin and accumulation of different classes of repetitive sequences in the process of B chromosome formation and evolution. Here we discuss the impact of repetitive sequences accumulation on the evolution of plant B chromosomes.

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Section: Cestrummentioning

confidence: 99%

Evolution of Plant B Chromosome Enriched Sequences

Marques

Klemme

Houben

2018

Preprint

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“…Approximately 24,000 species of angiosperms (4% of them) have Bs ( Levin et al 2005 ), and apparently, large genomes could favor or influence the occurrence of B chromosomes ( Trivers et al 2004 ). This appears to be true for some Solanaceae , since in the genus Cestrum , for example, species have 16 chromosomes with up to 12 µm and 20 pg of DNA per diploid set ( Paula et al 2015 ), and show the highest number of taxa with Bs. These chromosomes have been reported in C. diurnum Linnaeus, 1753 ( Sobti et al 1979 ), C. parqui L’Héritier, 1788 × C. aurantiacum Lindley, 1844 ( Sýkorová et al 2003 ), C. intermedium Sendtner, 1846, C. strigilatum ( Fregonezi et al 2004 ), C. parqui , C. euanthes Schlechtendal, 1832 and C. nocturnum Linnaeus, 1753, with 1-2, 1-3 and 1-10 B chromosomes, respectively ( Urdampilleta et al 2015 ).…”

Section: Introductionmentioning

confidence: 97%

“…Species of Cestrum exhibit a large variation in the occurrence and distribution of repetitive DNA families ( Paula et al 2015 ), and some of them have already been identified and associated with B chromosomes ( Fregonezi et al 2004 ). In the hybrid C. parqui × C. aurantiacum , for instance, the B chromosome contains 35S and 5S rDNA and SSR AT-rich motifs ( Sýkorová et al 2003 ).…”

Section: Introductionmentioning

confidence: 99%

Cestrum strigilatum (Ruiz & Pavón, 1799) B chromosome shares repetitive DNA sequences with A chromosomes of different Cestrum (Linnaeus, 1753) species

Vanzela

Paula

Quintas

et al. 2017

CCG

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Species of Cestrum (Linnaeus, 1753) have shown large diversity in the accumulation and distribution of repetitive DNA families, and B chromosomes have been described in seven species. Some types of repetitive DNA were identified in A and B chromosomes in species of this plant group, such as AT-rich SSR, 35S and 5S rDNA, C-Giemsa and C-CMA/DAPI bands and retrotransposons. To increase our understanding of the relationships of A and B chromosomes, the B of C. strigilatum Ruiz & Pavón, 1799 was microdissected, amplified and hybridized in situ against chromosomes of this species, and in six other species of this genus. FISH signals were observed in whole the B of C. strigilatum, including stretches of A chromosomes, as well as in some A chromosomes of all tested species. A strong FISH signal was seen adjacent to the 5S rDNA in the proximal region of pair 8 of all species and, due to this, we have searched for 5S rDNA fragments in the microdissected B chromosome. PCR and sequencing data evidenced 5S rDNA deletion along evolutionary pathways of the B of C. strigilatum. Although A and B chromosomes displayed redundancy in the repetitive DNA families in different species, the B of C. strigilatum seemed to differ from those Bs of other Cestrum species by the loss of rDNA fractions. A possible origin of Bs in Cestrum was discussed.

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“…It is interesting to note that even molecular details such as composition and distribution pattern of heterochromatin, which are generally useful for such chromosomally problematic genera, are also lacking in the genus Curcuma. The information regarding heterochromatic regions are cytologically recognized due to its condensation and differential staining during cell division [15]. Quantitative and qualitative differentiation of the heterochromatin played significant role in understanding the molecular composition of the genome without the need of advanced molecular techniques [16].…”

Section: Introductionmentioning

confidence: 99%

“…Highly repetetive DNA sequences are the main component of the heterochromatin of higher eukaryotic genomes [17]. It is mostly enriched at the centromeric and telomeric regions of the chromosomes, depending on the species or group of species [15], which contains satellite DNA, retrotransposons and/or rDNA sequences. Heterochromatin also serves a number of other important cellular and biological roles during recombination and segregation of chromosomes in meiosis/mitosis, and global control of gene regulation and speciation [18].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Heterochromatin Distribution Pattern in Wild and Cultivated Species of Curcuma L.

JM¹,

DR²

2016

Med Aromat Plants

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Fluorochrome banding pattern with CMA and DAPI showed variation in the type, amount and distribution of heterochromatin in all the Curcuma species studied. The study provided clear insight on the numbers and genomic components such as the repetitive (GC, AT and GC/AT-rich) and non-repetitive DNA fraction(s). The polymorphism in heterochromatic-rich repetitive fraction(s) reflects higher molecular organization of the genome and evolutionary status of the genus Curcuma. The present works entails the importance of heterochromatin rich-repetitive DNA fraction(s) which play significant role in genome organization and evolutionary pattern in the genus Curcuma.

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Comparative cytogenetic analysis ofCestrum(Solanaceae) reveals different trends in heterochromatin and rDNA sites distribution

Cited by 8 publications

References 31 publications

Evolution of Plant B Chromosome Enriched Sequences

Evolution of Plant B Chromosome Enriched Sequences

Cestrum strigilatum (Ruiz & Pavón, 1799) B chromosome shares repetitive DNA sequences with A chromosomes of different Cestrum (Linnaeus, 1753) species

Comparative Analysis of Heterochromatin Distribution Pattern in Wild and Cultivated Species of Curcuma L.

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Comparative cytogenetic analysis ofCestrum(Solanaceae) reveals different trends in heterochromatin and rDNA sites distribution

Cited by 8 publications

References 31 publications

Evolution of Plant B Chromosome Enriched Sequences

Evolution of Plant B Chromosome Enriched Sequences

Cestrum strigilatum (Ruiz &amp; Pavón, 1799) B chromosome shares repetitive DNA sequences with A chromosomes of different Cestrum (Linnaeus, 1753) species

Comparative Analysis of Heterochromatin Distribution Pattern in Wild and Cultivated Species of Curcuma L.

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Cestrum strigilatum (Ruiz & Pavón, 1799) B chromosome shares repetitive DNA sequences with A chromosomes of different Cestrum (Linnaeus, 1753) species