Comparative karyomorphology and interrelationships ofSelaginella in Japan

Takamiya, Masayuki

doi:10.1007/bf02344419

Cited by 19 publications

(25 citation statements)

References 16 publications

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“…Em angiospermas, os tipos de núcleos interfásicos são freqüentemente relacionados ao tamanho cromossômico e à quantidade de DNA nuclear (Guerra 1985). Takamiya (1993) chamou a atenção para a importância da análise dos tipos de núcleos interfásicos na citotaxonomia das pteridófitas. Aparentemente, há maior varia-bilidade de organização da cromatina entre as espécies heterosporadas.…”

Section: Resultsunclassified

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Cariologia de algumas espécies de Pteridófitas ocorrentes no nordeste do Brasil

2003

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RESUMO -(Cariologia de algumas espécies de pteridófitas ocorrentes no nordeste do Brasil). Foram analisadas citogeneticamente, através de técnicas de coloração convencional, sete espécies de pteridófitas homosporadas e três heterosporadas, pertencentes a oito famílias, sendo essas as primeiras contagens cromossômicas para essas espécies no Brasil. Dois parâmetros principais foram analisados no presente estudo: número cromossômico e tipos de núcleos interfásicos. Em algumas espécies, a morfologia cromossômica e a presença de satélites também foram avaliadas. De todas as espécies analisadas, duas não se tem conhecimento de contagens anteriores: Selaginella convoluta (Arn.) Spring (2n=24) e Thelypteris serrata (Cav.) Alston (2n=72), as quais apresentaram números já esperados para os gêneros. Nas demais espécies os números cromossômicos observados foram: Acrostichum aureum L., 2n=60; A. danaeifolium Langsd. & Fisch., 2n=60; Blechnum occidentale L., 2n=124; Cyathea microdonta (Desv.) Domin, 2n=138; Hemionitis palmata L., 2n=60; Marsilea quadrifolia L., 2n=40; Osmunda cinnamomea L., n=22 e Selaginella kraussiana (Kunze) A. Braun., 2n=20. A única alteração cariológica observada foi a presença de um tetravalente no único indivíduo analisado de O. cinnamomea. A estrutura do núcleo interfásico foi mais densamente reticulada, e mais homogeneamente corada nas espécies homosporadas, enquanto nas heterosporadas essa estrutura foi mais variável, apresentando quase sempre cromômeros ou cromocentros em número variado. Palavras-chave -pteridófitas, número cromossômico, núcleos interfásicosABSTRACT -(Karyology of some pteridophytes species occurring in the northeast of Brazil). Seven species of homosporous and three of heterosporous pteridophytes belonging to eight families, were cytogenetically analysed using conventional staining techniques. This is the first count for Brazilian populations of these species. Two karyological parameters were analysed: chromosome number and structure of interphase nucleus. Chromosome morphology and occurrence of satellites have also been evaluated in some species. Prior reports on chromosome counts are unkown for two of the species analysed: Selaginella convoluta (Arn.) Spring (2n=24) and Thelypteris serrata (Cav.) Alston (2n=72), which presented numbers already expected for their genera. The other species analysed had the following chromosome numbers: Acrostichum aureum L., 2n=60; A. danaeifolium Langsd. & Fisch., 2n=60; Blechnum occidentale L., 2n=124; Cyathea microdonta (Desv.) Domin, 2n=138; Hemionitis palmata L., 2n=60; Marsilea quadrifolia L., 2n=40; Osmunda cinnamomea L., n=22 and Selaginella kraussiana (Kunze)

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Section: Resultsunclassified

“…6). Os números cromossômicos encontrados em S. convoluta e em S. kraussiana coincidiram com dados de outras espécies do mesmo gênero (Goldblatt 1988;Takamiya 1993;Goldblatt & Johnson 1996). Os números básicos mais prováveis do gênero são x= 8, 9, 10 e 11 (Fabri 1963;1965), portanto, essas espécies devem ser diplóides.…”

Section: Resultsunclassified

Cariologia de algumas espécies de Pteridófitas ocorrentes no nordeste do Brasil

2003

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“…Chromosome information was taken from the literature (e.g., Graustein, 1930;Tschermak-Woess & Doležal-Janish, 1959;Jermy & al., 1967;Takamiya, 1993;Marcon & al., 2005;Heidel & Handley, 2006). Molecular (chloroplast and nuclear) results were based on Zhou & al.…”

Section: Methodsmentioning

confidence: 99%

A classification of Selaginella (Selaginellaceae) based on molecular (chloroplast and nuclear), macromorphological, and spore features

Zhou

Zhang

2015

TAXON

206

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The largest genus of seed‐free vascular plants Selaginella alone constitutes t he family Selaginellaceae, the largest of the lycophyte families. The genus is estimated to contain ca. 800 species distributed on all continents except Antarctica, with the highest species diversity in tropical and subtropical regions. The monophyly of Selaginella has rarely been doubted, in contrast its infrageneric classification has been contentious. In the present study, based on chloroplast and nuclear DNA evidence, macromorphology, spore features, and/or distribution information, Selaginella is classified into six subgenera: S. subg. Selaginella, S. subg. Boreoselaginella, S. subg. Pulviniella, S. subg. Ericetorum, S. subg. Heterostachys, and S. subg. Stachygynandrum. The latter three subgenera are further classified into six, five, and seven sections, respectively. All of these infrageneric divisions, identified with molecular data, are supported by non‐molecular features. A key to infrageneric taxa is given. Thirty‐seven infrageneric taxa published in earlier literature are lectotypified and classified into those infrageneric taxa here recognized. A nomenclatural account of each infrageneric taxon is given.

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“…Chromosome number of Selaginella has been investigated on several species of Europe (Reese 1951;Love and Love 1961;Borgen 1975), North America (Tryon 1955;Love 1961, 1976), India (Kuriachan 1963;Loyal 1976Loyal , 1984Ghatak 1977;Vasudeva and Bir 1983), China (Wang et al 1984;Weng and Qiu 1988), Taiwan Shieh 1983, 1988), Japan (Takamiya 1993), and other countries (Tchermak-Woes and DolezaI-Janish 1959;Zhukova and Petrovsky 1975). Jermy et al (1967) made extensive investigation on chromosome numbers of 76 species of Selaginella collected from the Malay Peninsula, Borneo, New Guinea, Australia, Trinidad, Puerto Rico, and Brazil, as well as on cultivated plants.…”

Section: Karyomorphologymentioning

confidence: 99%

“…Selaginella has variation of diploid chromosome number, 2n = 14-60, with basic chromosome number is x = 7, 8, 9, 10, 11, and 12 (Kuriachan, 1963;Jermy et al 1967;Takamiya 1993). This matter originate from x = 9, which later grouping with x = 10, 11, 12, and the other grouping with x = 7, 8 (Takamiya 1993;Mukhopadhyay 1998).…”

Section: Karyomorphologymentioning

confidence: 99%

Review: Recent status of Selaginella (Selaginellaceae) research in Nusantara

Setyawan

2011

Biodiversitas

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.) is a cosmopolitan genus that grows in tropical and temperate regions. Some species of Selaginella have widely distribution and tend to be invasive, but the others are endemics or even, according to IUCN criteria, endangered. Nusantara or Malesia (Malay Archipelago) is the most complex biogeographic region and rich in biodiversity. It is one of the biodiversity hotspot of Selaginella, whereas about 200 species of 700-750 species are exist. Selaginella has been survived for 440 mya without any significant morphological modification, but extinction of tree-shaped species. Selaginella have similar morphological characteristics, particularly having heterospore form and loose strobili; and is classified as one genus and one family. However, individual species has high morphological variation caused by different edaphic and climatic factors. Genetic studies indicate high polymorphism among Selaginella species. Selaginella had been used as complementary and alternative medicines treated to postpartum, menstrual disorder, wound, etc. Biflavonoid -the main secondary metabolites -gives this benefit and is especially used as anti oxidant, anti-inflammatory, and anti cancer in modern pharmaceutical industry. The other metabolites, trehalose, potentially act as molecular stabilizer in biological based industry. Metabolite profiles can also be used to identify Selaginella by its species, time and harvest age, and locations. Since most of Selaginella grows on moist, organically rich, and well drained soils, which is vulnerable to forest degradation and global warming, it needs more conservation priority. Biosystematics and ethnobotanical researches of Nusantara Selaginella is needed to expand taxonomic status and bioprospecting of this bioresources.

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Comparative karyomorphology and interrelationships ofSelaginella in Japan

Cited by 19 publications

References 16 publications

Cariologia de algumas espécies de Pteridófitas ocorrentes no nordeste do Brasil

Cariologia de algumas espécies de Pteridófitas ocorrentes no nordeste do Brasil

A classification of Selaginella (Selaginellaceae) based on molecular (chloroplast and nuclear), macromorphological, and spore features

Review: Recent status of Selaginella (Selaginellaceae) research in Nusantara

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