Spore morphology and ornamentation in the genus<i>Blechnum</i>(Blechnaceae)

Passarelli, Lilian Mónica; Galán, José María Gabriel y; Prada, Cármen; Rolleri, Cristina Hilda

doi:10.1080/00173134.2010.524245

Cited by 33 publications

(39 citation statements)

References 34 publications

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“…This arborescent clade is supported by many synapomorphic characters. Some morphological ones include the stout, massive vertical rhizomes, forming a more or less tall caudex; the long, acicular scales; an epidermal type of more-or-less rectangular cells; and densely folded spores (Ramos Giacosa, 2008;Rolleri et al, 2008;Passarelli et al, 2010;Rolleri et al, 2013). They also present some shared nucleotide indels in the trnL-trnF region.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, B. serrulatum and Salpichlaena species have spores with orbiculate perispores carrying irregularly arranged rugose orbicules (Tryon & Lugardon, 1991;Giudice et al, 2008;Passarelli et al, 2010). Although it has been stated that these orbicules or spherules are common in Blechnum (Tryon & Lugardon, 1991), we have only seen them in B. serrulatum and B. fernandezianum, which belong to the B. penna-marina group (Passarelli, 2007;Passarelli et al, 2010). The major differences between these taxa are the absence of indusia in Stenochlaena, and the fact that B. serrulatum is monomorphic while all Salpichlaena and Stenochlaena species are strongly dimorphic.…”

Section: Discussionmentioning

confidence: 99%

“…Kuhn group, originally named B. buchtienii Rosenst. group (Rolleri et al, 2013) (Tryon & Tryon, 1982;Durán, 1997;Dittrich, 2005;Rolleri & Prada, 2006b;Passarelli, 2007;Prada et al, 2007;Gabriel y Galán et al, 2008;Ramos Giacosa, 2008;Rolleri et al, 2008;Passarelli et al, 2010;Rolleri et al, 2010;Gabriel y Galán et al, 2011;Rolleri et al, 2012a;Rolleri et al, 2012b;Rolleri et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology

Galán¹,

Prada²,

Rolleri³

et al. 2013

Turk J Bot

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International audienceBlechnaceae is an important leptosporangiate family (9-10 genera, about 250 species). It is monophyletic and distributed mainly in tropical America and Australasia. Among the species 80% belong to Blechnum, a genus with a very complex taxonomy and uncertain internal relationships. In terms of American diversity, the results of morphological studies have arrived at 8 informal groups. Molecular works on this genus are scarce, and there is no information for the majority of American species. The main objective of this work was to evaluate whether the groups proposed to organise the diversity of American of Blechnum are consistent with a molecular analysis. We sequenced 2 chloroplastic regions from species representing all of the groups. In our molecular analysis most of the informal groups were maintained as well supported clades. Only 2 species, B. brasiliense and B. spicant, appear to be isolated from their alleged relatives. Combining our molecular results with previous morphological knowledge, we propose the recognition of 4 lineages: 1) B. serrulatum , 2) B. spicant, and 3) core Blechnum, which represents a large clade that can be divided into core Blechnum I (arborescent species, cordatoids, and B. brasiliense) and core Blechnum II (epiphytic species and herbaceous terrestrials, both monomorphic and dimorphic groups)

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology

Galán¹,

Prada²,

Rolleri³

et al. 2013

Turk J Bot

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“…Los modelos epidérmicos son similares a los de B. gracile, pero con sinuosidades curvas, no angulosas. Las esporas difieren de las demás especies del grupo, por sus perisporios rugulado-rugados, la lesura prominente, larga, labiado-ondulada y la estructura más compleja del esporodermo (Passarelli et al 2010 Observaciones. Se la ha confundido con B. polypodioides (Murillo 1968, Tryon & Stolze 1993, Lavalle et al 2007, aunque la sinonimia varía con cada uno de esos autores.…”

Section: Resultsunclassified

“…Las dimensiones y densidad de estomas se tomaron en todos los ejemplares estudiados; las dimensiones se expresan en longitud × anchura, en μm y la densidad en número de estomas por mm 2 . El tratamiento de los tipos esporales para el género, incluyendo las especies aquí estudiadas se puede consultar en Passarelli et al (2010) y aquí sólo se ha incluido un breve resumen de las dimensiones esporales y tipos de ornamentación del perisporio. Toda la terminología relacionada con el esporófito está en Lellinger (2002), la referente a la epidermis es la que se ha utilizado en trabajos pteridológicos previos (Rolleri & Prada 2006a, Gabriel y Galán et al 2008, la relacionada con los estomas se ha tomado de Prabhakar (2003) y la relativa a las esporas de Passarelli et al (2010).…”

Section: Materiales Y Métodosunclassified

Revisión de especies monomórficas y subdimórficas del género "Blechnum" ("Blechnaceae-Polypodiophyta")

et al. 2012

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A multi‐character analysis of Struthiopteris leads to the rescue of Spicantopsis (Blechnaceae, Polypodiopsida)

Molino

Galán

Sessa

et al. 2019

TAXON

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The family Blechnaceae is a moderately sized leptosporangiate fern lineage, with 24 genera and around 250 species. Struthiopteris accommodates small to medium-sized, dimorphic, pinnate species. It is composed of six northern species: S. spicant is distributed in western parts of Europe and North America; S. fallax is endemic to Iceland; S. niponica, S. amabilis and S. castanea are endemic to Japan, and S. hancockii occurs in Japan and Taiwan. Due to the lack of a global review and to its highly interesting geographical distribution, this genus merits further study to clarify its taxonomy, species relationships, and distributional pattern. The present study aims to achieve the following goals: (a) identify and describe morphological characters supporting the taxonomy of Struthiopteris; (b) reconstruct a complete phylogeny for the genus; (c) study the biogeographical history of Struthiopteris at a global scale. The morphological study involved the observation of characters ranging from rhizome scales to spores over 164 individuals. Phylogenies were constructed applying ML and BI techniques over 51 newly produced sequences of three chloroplast markers (rbcL, trnL-trnF, psbA-trnH), using the species Blechnidium melanopus and Brainea insignis as closest relatives. For the molecular dating and historical biogeography analyses, we estimated and compared ancestral ranges under several models. Most of the morphological characters led us to discern two groups of species: the S. spicant group (S. spicant, S. fallax, and S. castanea) and the S. niponica group (the remaining species). In our molecular phylogeny, the supposed sister genus Blechnidium always appeared as nested within Struthiopteris, rendering this genus non-monophyletic. The two groups identified by the morphology appeared as monophyletic clades within Struthiopteris, with the clade S. spicant more closely related to Blechnidium than to the clade S. niponica. For all these reasons, we propose to rescue the now-disused genus Spicantopsis for the species belonging to the S. niponica group: indeed, this genus was created c. 100 years ago to reunite the same species S. amabilis, S. niponica, and S. hancockii. Our results suggest that all members of this group of genera (Blechnidium, Struthiopteris, Spicantopsis) emerged in East Asia about 85 mya, at a time when Japan was still part of the mainland. It appears that, for most of their history, the members of these genera have been confined to East Asia, with one dispersal to the Americas by an ancestor within Struthiopteris s.str., and additional dispersals to India and the Philippines by Blechnidium melanopus.

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Spore morphology and ornamentation in the genusBlechnum(Blechnaceae)

Cited by 33 publications

References 34 publications

cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology

cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology

Revisión de especies monomórficas y subdimórficas del género "Blechnum" ("Blechnaceae-Polypodiophyta")

A multi‐character analysis of Struthiopteris leads to the rescue of Spicantopsis (Blechnaceae, Polypodiopsida)

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