Chromosome numbers, meiotic behavior, and pollen viability of species of <i>Vriesea</i> and <i>Aechmea</i> genera (Bromeliaceae) native to Rio Grande do Sul, Brazil

Palma‐Silva, Clarisse; Santos, Daniel Gonçalves dos; Kaltchuk-Santos, Eliane; Bodanese‐Zanettini, Maria Helena

doi:10.3732/ajb.91.6.804

Cited by 22 publications

(22 citation statements)

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“…All metaphase I cells were regular with predominant bivalent pairing indicating that plants of these two species are potentially interfertile. Regular meiosis was also reported for species of two other diploid bromeliad genera Vriesea and Aechmea (Palma-Silva et al 2004. This is the first report of meiotic chromosome pairing for a polyploid species.…”

Section: Resultsmentioning

confidence: 72%

“…In the Bromeliaceae, cytogenetic studies are rare and chromosome numbers have been reported for no more than 12% of the species (Lindschau 1933;Gauthé 1965;Weiss 1965;Marchant 1967;Sharma & Ghosh 1971;McWilliams 1974;Brown et al 1984;Varadarajan & Brown 1985;Brown & Gilmartin 1986, 1989Lin et al 1987;Brown et al 1997;Cotias-de-Oliveira et al 2000Ramírez-Morillo & Brown 2001;Palma-Silva et al 2004;Bellintani et al 2005;Gitaí et al 2005). The chromosomes are small with sizes varying between 0.23 mm and 1.5 mm (Cotias-de-Oliveira et al 2000;Ceita et al 2008).…”

Section: Introductionmentioning

confidence: 99%

“…He was the first to propose x = 25 as the basic chromosome number for Bromeliaceae. Nowadays, all studies based on meiotic (Brown & Gilmartin 1983, 1986, 1989Brown et al 1997;Palma-Silva et al 2004 Chromosome numbers have been reported for only six species of Orthophytum, revealing an euploid series (i.e. polyploids in exact multiples of the basic number) of 2n = 2x = 50, 2n = 4x = 100 and 2n = 6x = 150 chromosomes (Ramírez-Morillo & Brown 2001;Cotias-de-Oliveira et al 2000Bellintani et al 2005;Gitaí et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Chromosome number of Orthophytum species (Bromeliaceae)

et al. 2010

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Summary. The genus Orthophytum Beer comprises 53 species, all narrow endemics to south-eastern and northeastern Brazil. In this study we present meiotic and mitotic chromosome numbers of 12 species of this important genus in Bromeliaceae. For six of these taxa we are reporting the first cytogenetic study. Orthophytum albopictum, O. amoenum and O. burle-marxii presented 2n = 100 chromosomes and O. hatschbachii, O. mucugense, O. vagans, O. supthutii, O. zanonii and O. ophiuroides showed 2n = 50 chromosomes. These results are consistent with the proposed basic number of x = 25 for Bromeliaceae family. In the genus Orthophytum, polyploidy seems to play an important role in chromosome evolution associated with habitat differentiation among diploid and polyploid species.

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Section: Resultsmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chromosome number of Orthophytum species (Bromeliaceae)

et al. 2010

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“…In addition, meiotic studies carried out by Palma‐Silva et al . 2004; 2008) reported meiotic irregularities in Vriesea and Aechmea , including irregular pairing and observations of univalents, which may lead to a misinterpretation of the bivalent number during meiosis, especially in taxa with small chromosomes.…”

Section: Discussionmentioning

confidence: 99%

Chromosome numbers and DNA content in Bromeliaceae: additional data and critical review

et al. 2014

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For the large Neotropical plant family Bromeliaceae, we provide new data on chromosome numbers, cytological features and genome size estimations, and combine them with data available in the literature. Root‐tip chromosome counts for 46 species representing four subfamilies and a literature review of previously published data were carried out. Propidium iodide staining and flow cytometry were used to estimate absolute genome sizes in five subfamilies of Bromeliaceae, sampling 28 species. Most species were diploid with 2n = 50 in Bromelioideae, Puyoideae and Pitcairnioideae, followed by 2n = 48 observed mainly in Tillandsioideae. Individual chromosome sizes varied more than tenfold, with the largest chromosomes observed in Tillandsioideae and the smallest in Bromelioideae. Genome sizes (2C‐values) varied from 0.85 to 2.23 pg, with the largest genomes in Tillandsioideae. Genome evolution in Bromeliaceae relies on two main mechanisms: polyploidy and dysploidy. With the exception of Tillandsioideae, polyploidy is positively correlated with genome size. Dysploidy is suggested as the mechanism responsible for the generation of the derived chromosome numbers, such as 2n = 32/34 or 2n = 48. The occurrence of B chromosomes in the dysploid genus Cryptanthus suggests ongoing speciation processes closely associated with chromosome rearrangements. © 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 176, 349–368.

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“…Even basic cytogenetic studies in this family are scarce, and only approximately 10% of the species have had their chromosome numbers reported. In Vriesea, a genus that comprises approximately 250 species, chromosome numbers have been recorded for no more than 24 species (Gauthè 1965; Weiss 1965; Marchant 1967; Brown & Gilmartin 1989; Palma‐Silva et al . 2004).…”

Section: Introductionmentioning

confidence: 99%

Meiotic behavior and pollen viability of wild populations of the neotropical species Vriesea gigantea (Bromeliaceae)

Palma‐Silva

Paggi

Felicetti

et al. 2008

Plant Species Biology

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Plant fertility can influence many aspects of population ecology and evolution. The quantity and quality of pollen produced by a plant is an important component of reproductive success. Plant fertility was analyzed by assessing: chromosome number, meiotic behavior and pollen viability of seven native populations of Vriesea gigantea. All plants presented 2n = 50 chromosomes. Most of the pollen mother cells showed a regular meiotic behavior with 25 bivalents and regular chromosome segregation. In accordance, high pollen viability (84-98%) was recorded for all investigated populations. These results indicated that plants from all populations analyzed are fertile. Despite the overall high pollen viability, significant differences were detected among populations. The population of Praia do Araçá showed a reduced percentage of pollen viability, although meiosis was quite regular. Reduction in pollen viability could have an important effect on plants fertility and, consequently, on fitness of this population.

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Chromosome numbers, meiotic behavior, and pollen viability of species of Vriesea and Aechmea genera (Bromeliaceae) native to Rio Grande do Sul, Brazil

Cited by 22 publications

References 10 publications

Chromosome number of Orthophytum species (Bromeliaceae)

Chromosome number of Orthophytum species (Bromeliaceae)

Chromosome numbers and DNA content in Bromeliaceae: additional data and critical review

Meiotic behavior and pollen viability of wild populations of the neotropical species Vriesea gigantea (Bromeliaceae)

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