The Systematic Position of Psilotum and Tmesipteris

Bierhorst, David W.

doi:10.2307/2805738

Cited by 47 publications

(28 citation statements)

References 18 publications

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“…The meiotic apparatus appears very similar to that reported in fquisetum (Bednara and Rodkiewicz 19€!4), Psilotum (Gabarajeva 1984a(Gabarajeva , 198413, 1985, and leptosporangiate ferns (Sheffield and Bell 1987). Recent cladistic analyses have suggested associations between Psilophytes and Ophioglossaceae (Manhart 1995;Pryer et a/ 1995) resurrecting a fairly old idea (Bierhorst 1977). There is nothing in this study that is inconsistent with this idea.…”

Section: Discussioncontrasting

confidence: 43%

Sporogenesis in Eusporangiate Ferns: II. Polyplastidic Meiosis in Ophioglossum (Ophioglossales)

Brown

Lemmon

2001

J Plant Res

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Structural studies of sporogenesis using combined methods of immunofluorescence labelling of microtubules and transmission electron microscopy provide details of meiosis and cytokinesis in Ophiog/ossum petiolatum. Unlike Angiopteris (Marattiales), which is monoplastidic, Ophiog/lossum undergoes polyplastidic meiosis like members of the fern-seed plant clade. The meiotic spindle is distinctly multipolar in origin and is consolidated into a bipolar spindle that is variously twisted and curved to accommodate the large number of chromosomes. Although a phragmoplast forms after first meiosis, no wall is deposited. Instead, an organelle band consisting of intermingled plastids and mitochondria is formed in the equatorial region between the dyad domains. Following second meiosis, a complex of phragmoplasts forms among sister and non-sister nuclei. Cell plates are deposited first between sister nuclei and then in the region of the organelle band resulting in a tetrad of spores each with a equal allotment of organelles.

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Section: Discussioncontrasting

confidence: 43%

Sporogenesis in Eusporangiate Ferns: II. Polyplastidic Meiosis in Ophioglossum (Ophioglossales)

Brown

Lemmon

2001

J Plant Res

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“…is one of two genera in the Psilotaceae, the other being Psilotum Sw. The Psilotaceae are morphologically isolated, and their relationship to other vascular plants is obscure and controversial (Bierhorst 1977;Brownsey & Lovis 1987;Rothwell 1999;Wagner 1977). Recent phylogenetic analyses of DNA sequences alone (Pryer et al 2004;Qiu et al 2007), and alongside morphological data from extant and fossil lineages (Rothwell & Nixon 2006), have suggested that the Psilotaceae are sister to the Ophioglossaceae, but have not convincingly established the position of this clade among the major euphyllophyte groups (Rothwell & Nixon 2006).…”

Section: Introductionmentioning

confidence: 97%

Tmesipteris horomaka, a new octoploid species from Banks Peninsula

Perrie

Brownsey

Lovis

2010

New Zealand Journal of Botany

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Tmesipteris horomaka sp. nov. is a rare octoploid, endemic to Banks Peninsula, New Zealand. It is morphologically intermediate between the tetraploids Tmesipteris elongata and Tmesipteris tannensis, and is possibly their allopolyploid derivative. DNA sequences from the trnLÁtrnF locus of the uniparentally inherited chloroplast support T. elongata as a progenitor, but direct evidence for T. tannensis is lacking. Tmesipteris horomaka differs from T. elongata in having predominantly emarginate to truncate leaf apices, and from T. tannensis in having synangia that are more rounded in shape, lacking or with only slight points that are directed laterally, rather than being clearly biconic with the points directed upwards away from the subtending leaf. Tmesipteris horomaka generally has bigger spores than both T. elongata and T. tannensis. We suggest that T. horomaka be treated in the Threat Classification System as Nationally Critical DP, OL , this being based on the small number of tree fern hosts on which it is currently known to grow.

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“…This was undoubtedly of fundamental importance in the development and success of the early vascular plants,' since both classes of compound 'have been shown to protect plants against herbivores and phytopathogens (Swain 1979). These compounds are absent from some early land plants and in the light of this distinct chemical separation, Bierhorst's (1977) premise that the Psilotaceae should be included with the filicalean line seems unlikely (Cooper-Driver 1977;Wallace and Markham 1978a).…”

mentioning

confidence: 95%

“…Matteucia also synthesizes C-methyl flavanones (e.g., matteucinol-7-0-glucoside). Hiraoka (1978) argues that evolution proceeds from complex O-glycosylation of flavonols and a greater range of flavonoid structure to a loss in the ability to synthesize flavonoids and a decrease in the diversity of glycosylation patterns (see also Gornall and Bohm 1978). On this basis Hiraoka concludes that the onocleoid ferns are more primitive than the athyreoids.…”

mentioning

confidence: 96%

The Role of Flavonoids and Related Compounds in Fern Systematics

Cooper‐Driver¹

1980

Bulletin of the Torrey Botanical Club

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The Systematic Position of Psilotum and Tmesipteris

Cited by 47 publications

References 18 publications

Sporogenesis in Eusporangiate Ferns: II. Polyplastidic Meiosis in Ophioglossum (Ophioglossales)

Sporogenesis in Eusporangiate Ferns: II. Polyplastidic Meiosis in Ophioglossum (Ophioglossales)

Tmesipteris horomaka, a new octoploid species from Banks Peninsula

The Role of Flavonoids and Related Compounds in Fern Systematics

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