Phylogenetic Relationships of the Neotropical Genus &lt;I&gt;Dioon&lt;/I&gt; (Cycadales, Zamiaceae) Based on Nuclear and Chloroplast DNA Sequence Data

González, Dolores; Vovides, Andrew P.; Bárcenas, Cristina

doi:10.1600/036364408784571699

Cited by 27 publications

(40 citation statements)

References 37 publications

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“…Ancestral state reconstruction using parsimony was employed on the trees of González et al . () and Moretti et al . ().…”

Section: Methodsmentioning

confidence: 86%

“…On the tree of González et al . (), the ancestral state for the genus appears to be narrow stomatal bands and encircling cell papillae present, with the evolution of wide stomatal bands and the loss of encircling cell papillae in the ancestor of the Spinulosum clade.…”

Section: Resultsmentioning

confidence: 99%

“…() and González et al . () involves only the ancestral state of the character, which is ambiguous on the topology of Moretti et al . ().…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, concerning the two main clades recognized in the genus on the grounds of nuclear and plastid DNA sequence data (Moretti et al ., ; Bogler & Francisco‐Ortega, ; González et al ., ; Nagalingum et al ., ; Condamine et al ., ), the support for the Spinulosum clade ( D. mejiae Standl. & L.O.Williams, D. spinulosum Dyer ex Eichler and D. rzedowskii De Luca, Sabato & Vázq.Torres) is solid, but the position of D. edule Lindl.…”

Section: Introductionmentioning

confidence: 99%

“…González et al . () assigned D. edule (with D. angustifolium Miq.) to a separate clade allied to the Spinulosum clade and placed the other Dioon spp.…”

Section: Introductionmentioning

confidence: 99%

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Epidermal micromorphology inDioon: did volcanism constrainDioonevolution?

et al. 2015

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The genus Dioon occupies an important phylogenetic position as sister to the other Zamiaceae. However, its epidermal morphology is still poorly known. We employed scanning and transmission electron microscopy, confocal microscopy and light microscopy to examine the epidermal and cuticular morphology of 12 of the 14 currently recognized species of Dioon, examining cultivated plants and herbarium specimens. Epidermal characters separate Dioon quite clearly from the other genera of the cycads. Within the genus, the major subgroups can be distinguished by their epidermal morphology. Some characters, such as the degree of stomatal protection, reflect ecological specializations in species within the subgroups. Several epidermal characters of the crown group Dioon seem to be absent in the Cenozoic fossils usually associated with the genus, which have been used as calibrations in many recent molecular dating analyses. The presence of similar characters in a Mesozoic fossil adapted to volcanic stress offers a new key in the interpretation of Dioon evolution

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“…Ancestral state reconstruction using parsimony was employed on the trees of González et al . () and Moretti et al . ().…”

Section: Methodsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

“…() and González et al . () involves only the ancestral state of the character, which is ambiguous on the topology of Moretti et al . ().…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…González et al . () assigned D. edule (with D. angustifolium Miq.) to a separate clade allied to the Spinulosum clade and placed the other Dioon spp.…”

Section: Introductionmentioning

confidence: 99%

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Epidermal micromorphology inDioon: did volcanism constrainDioonevolution?

et al. 2015

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Pleistocene diversification in an ancient lineage: a role for glacial cycles in the evolutionary history of Dioon Lindl. (Zamiaceae)

Dorsey

Gregory²,

Sass

et al. 2018

American J of Botany

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This study confirms the Pleistocene age of Dioon species and implicates Pleistocene climate change and established topography in lineage spitting. These results add to our understanding of the cycads as evolutionarily dynamic lineages, not relicts or evolutionary dead ends. We also find that well-supported secondary calibration points can be reliable in the absence of fossils. Our hypothesis of lineage splitting mediated by habitat shifts may be applicable to other taxa that are restricted to elevation specific ecotones.

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Phylogenetic analyses of the banana family (Musaceae) based on nuclear ribosomal (ITS) and chloroplast (trnL‐F) evidence

Liu

Kress

2010

TAXON

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The banana family (Musaceae s.str.; Zingiberales), an economically important tropical group of plants, includes three genera, Musa, Ensete and Musella, and possibly 41 species. We performed phylogenetic analyses of a total of 39 accessions covering 28 species in the Musaceae and five outgroup species using nuclear ribosomal ITS and chloroplast trnL‐F sequences. Outgroups were chosen from the closely related families Lowiaceae, Strelitziaceae, and Heliconiaceae. Our results suggest that Musaceae s.str. is monophyletic. Three main internal clades are well‐supported within the family. The genus Musa is comprised of two of these clades, and Musella plus Ensete make‐up the third clade. The sectional classification system of Musa based on chromosome numbers is not supported by DNA sequence evidence. Both inflorescence orientation (erect or pendent) and chromosomal number in Musa, which were characters traditionally thought to be diagnostic in sectional classification, are homoplasious traits in the family. The disjunct distribution of living members of the genus Ensete in tropical Asia and Africa with a fossil species described from the Eocene of Oregon in North America may be an example of the distributional retreat of the Boreal Tropics. The phylogenetic position of the monospecific Musella as sister to the African clade of Ensete suggests that the single species in this lineage is a highly specialized member not warranting generic status. Evidence from the molecular phylogenetic investigations highlights the evolutionary diversification and biogeographic context of this plant group, and suggests additional taxonomic investigations of both Musa and Ensete are in order.

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Phylogenetic Relationships of the Neotropical Genus <I>Dioon</I> (Cycadales, Zamiaceae) Based on Nuclear and Chloroplast DNA Sequence Data

Cited by 27 publications

References 37 publications

Epidermal micromorphology inDioon: did volcanism constrainDioonevolution?

Epidermal micromorphology inDioon: did volcanism constrainDioonevolution?

Pleistocene diversification in an ancient lineage: a role for glacial cycles in the evolutionary history of Dioon Lindl. (Zamiaceae)

Phylogenetic analyses of the banana family (Musaceae) based on nuclear ribosomal (ITS) and chloroplast (trnL‐F) evidence

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