Cytomorphological variation in Selaginella

Jermy, A. C.; Jones, Keith; Colden, C.

doi:10.1111/j.1095-8339.1967.tb00083.x

Cited by 25 publications

(35 citation statements)

References 9 publications

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“…However, most study is only conducted in western part, though many taxa spread in all over areas (Brown et al 2006). Selaginella is fern with cosmopolitan distribution, especially at subtropical and tropical areas (Tryon and Tryon 1982;Jermy 1990;Kramer and Green 1990). This plant can be found in ninth bioregions of Nusantara, which diversity depends on the island width.…”

Section: Diversitymentioning

confidence: 99%

“…It has dichotomous branch and minute scale-like leaves that are generally in two different sizes, where median is smaller than lateral ones (Jermy 1990). This morphological characteristic is only little change since Carboniferous period, when this plant lives in tropical wetland (Thomas 1992(Thomas , 1997.…”

Section: Morphological and Anatomical Descriptionmentioning

confidence: 99%

“…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. Those are the only karyomorphological investigation which include Nusantara Selaginella.…”

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%

“…This plant 750 species (Tryon and Tryon 1982;Jermy 1990). This ascertainment is not only supported by common taxonomic data, but also supported by newest biomolecular data.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Diversitymentioning

confidence: 99%

Section: Morphological and Anatomical Descriptionmentioning

confidence: 99%

Section: Karyomorphologymentioning

confidence: 99%

Section: Karyomorphologymentioning

confidence: 99%

“…This plant 750 species (Tryon and Tryon 1982;Jermy 1990). This ascertainment is not only supported by common taxonomic data, but also supported by newest biomolecular data.…”

Section: Introductionmentioning

confidence: 99%

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

Setyawan

2011

Biodiversitas

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Sexual and Subsexual Systems in Homosporous Pteridophytes: A New Hypothesis

Klekowski

1973

American J of Botany

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Meiosis in homosporous ferns allows chromosomes to pair within homoeologous sets rather than restricting pairing to homologs; this allows homozygous spore mother cells to give rise to genetically heterogeneous meiospores. It is envisioned that such a meiotic system has evolved in homosporous ferns in response to a life cycle which allows the attainment of total homozygosity in one generation of selfing.

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Biosystematic studies on the genus Isoetes (Isoetaceae) in Japan. II. Meiotic behavior and REPRODUCTIVE MODE OF EACH CYTOTYPE

Takamiya

Watanabe

Ono

1996

American J of Botany

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Meiotic behaviors and reproductive modes of Japanese Isoetes were studied. The hexaploid (2n = 66) and the octaploid (2n = 88) of I. japonica consistently formed 33 and 44 bivalents, respectively, at diakinesis and/or metaphase I in both micro‐ and megaspore mother cells. The tetraploid (2n = 44) of I. sinensis formed 22 bivalents and its hexaploid made 33 bivalents in both types of spore mother cells. At diakinesis and/or metaphase I of microspore mother cells in I. asiatica with 2n = 22, 11 bivalents were detected. Because behaviors of meiosis in all cytotypes mentioned above were quite regular and plants yielded normal‐appearing spores, they should reproduce sexually. Aneuploids of I. japonica with 2n = 87 formed 43 bivalents and one univalent, and I. sinensis with 2n = 65 formed 32 bivalents and one univalent in microspore mother cells. Meiosis of both cytotypes was almost regular and yielded microspores of normal appearance. In the heptaploid (2n = 77) of I. japonica, a configuration of 22 bivalents and 33 univalents was detected in micro‐ and megaspore mother cells, and various irregularities were observed throughout the meiotic divisions. Therefore, the genomic formula of the heptaploid is symbolized as AABBCDE, and the heptaploid is a sterile F, hybrid between the hexaploid (AABBCC) and the octaploid (AABBDDEE) of I. japonica. Since diploid and even‐numbered polyploids regularly formed bivalents and odd‐numbered ones displayed irregularities, allopolyploidy should act as a significant speciation mechanism in this genus.

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Cytomorphological variation in Selaginella

Cited by 25 publications

References 9 publications

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

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

Sexual and Subsexual Systems in Homosporous Pteridophytes: A New Hypothesis

Biosystematic studies on the genus Isoetes (Isoetaceae) in Japan. II. Meiotic behavior and REPRODUCTIVE MODE OF EACH CYTOTYPE

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