A molecular phylogeny of the wild onions (Allium; Alliaceae) with a focus on the western North American center of diversity

Nguyen, Nhu; Driscoll, Heather; Specht, Chelsea D.

doi:10.1016/j.ympev.2007.12.006

Cited by 87 publications

(69 citation statements)

References 19 publications

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“…3h), as also given by Choi and Oh (2011) such bulb tunic ultrasculpture (McNeal, 1992;McNeal and Jacobsen, 2002;Nguyen et al, 2008). In this context, note that subgenus Microscordum is most closely related to subgenus Amerallium (Friesen et al, 2006).…”

Section: Allium Subgenus Microscordummentioning

confidence: 81%

“…The bulb tunic ultrasculpture of North American representatives of subgenus Amerallium has been examined and deemed valuable in elucidating relationships among the North American species (McNeal, 1992). The native North American taxa of subgenus Amerallium were found to be a well-supported monophyletic clade, sister to the Old World taxa (Nguyen et al, 2008). Scape anatomical characters have also indicated close relationships between Old World and New World species of subgenus Amerallium (Fritsch, 1993).…”

Section: Allium Subgenus Ameralliummentioning

confidence: 99%

“…The genus is characterized by the presence of bulbs enclosed in membranous (sometimes becoming fibrous) tunics, free or almost-free tepals and often a subgynobasic style (Friesen et al, 2006). The diversity of Allium is greatest in Southwest and Central Asia and the Mediterranean region, and there is a second smaller center of diversity in North America (McNeal, 1992;Friesen et al, 2006;Nguyen et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Some characters have proved useful at subgeneric and sectional levels, including the structure and shape of rhizome and bulb, and anatomical features of root, leaf, scape, ovary, septal nectaries and seed (De Wilde-Duyfjes, 1976;Fritsch, 1992Fritsch, , 1993Kruse, 1992;McNeal, 1992;Friesen et al, 2006;Gurushidze et al, 2008;Nguyen et al, 2008;Choi and Cota-Sánchez, 2010;Celep et al, 2012). Many other characters are diagnostically important and commonly used in species descriptions.…”

Section: Introductionmentioning

confidence: 99%

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Cell Pattern and Ultrasculpture of Bulb Tunics of Selected Allium Species (Amaryllidaceae) and their Diagnostic Value

Rola¹

2014

Acta Biologica Cracoviensia S. Botanica

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Cell pattern and ultrasculpture were examined by light and scanning electron microscopy in bulb tunics of 46 Allium species to determine the diagnostic value of micromorphological characters. The study examined the diversity of these characters, evaluated their usefulness at different taxonomic levels (species, section, subgenus), and considered the results in relation to the recent intrageneric classification of the genus. Detailed characteristics are provided for the investigated species, and taxa showing the presence of calcium oxalate crystals in bulb tunic cells are indicated. The results suggest that several bulb tunic characters are of taxonomic significance in Allium as their variation between specimens of the same species was negligible; they can be useful elements of species descriptions and determination keys. Allium subgenus Allium shows considerable variation of bulb tunic ultrasculpture and hexagonal or elongated cell patterns. Differences in ultrasculpture are sufficient to distinguish species within the Amerallium subgenus. Three subgenera (Anguinum, Butomissa, Reticulatobulbosa) are characterized by fibrous tunics with reticulate ultrasculpture. Rectangular to elliptic cells with thick walls, giving the bulb tunic an almost perforated structure, are characteristic for Allium subgenus Cepa. No specific pattern was found for Allium subgenus Melanocrommyum and Polyprason. The only representative of subgenus Microscordum (Allium monanthum) showed distinct herringbone ultrasculpture. The bulbs of Allium subgenus Rhizirideum representatives can be distinguished by their linear ultrasculpture following the long axis of the elongated cells. Allium bulb tunic ultrasculpture and cell pattern show some degree of variability. These characters are of potential use in taxonomic delimitation, species determination and further study of the relationships between species, particularly in members of subgenus Amerallium.K Ke ey y w wo or rd ds s: : Allium, bulb tunic, calcium oxalate crystals, micromorphology, SEM, taxonomy, ultrasculpture.

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Section: Allium Subgenus Microscordummentioning

confidence: 81%

Section: Allium Subgenus Ameralliummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cell Pattern and Ultrasculpture of Bulb Tunics of Selected Allium Species (Amaryllidaceae) and their Diagnostic Value

Rola¹

2014

Acta Biologica Cracoviensia S. Botanica

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“…Despite the dramatic morphologies, few biogeographical studies have used molecular tools to understand the origin and evolution of insular floras thriving on this unique habitat. Most such studies have focused on continental regions with small radiations over serpentine areas, as in the Mediterranean, Asia Minor, and California (e.g., Cecchi & Selvi, 2009;Nguyen et al, 2008). Serpentine radiations within tropical islands are even more poorly researched.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetics, Conservation, and Historical Biogeography of the West Indian Members of the Adelieae (Euphorbiaceae)

Jestrow¹

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The Caribbean Island Biodiversity Hotspot is the largest insular system of the New World and a priority for biodiversity conservation worldwide. The tribe Adeliae (Euphorbiaceae) has over 35 species endemic to this hotspot, representing one of the most extraordinary cases of speciation in the West Indies, involving taxa from Cuba, Hispaniola, Jamaica, and the Bahamas. These species form a monophyletic group and traditionally have been accommodated in two endemic genera: Lasiocroton and Leucocroton. A study based on: (1) scanning electron microscopy of pollen and trichomes, (2) macromorphology, and (3) molecular data, was conducted to reveal generic relationships within this group. Phylogenies were based on parsimony and Bayesian analyses of nucleotide sequences of the ITS regions of the nuclear ribosomal DNA and the non-coding chloroplast DNA spacers psbM-trnD and ycf6-pcbM. One species, Lasiocroton trelawniensis, was transferred from the tribe into the genus Bernardia. Of the remaining species, three major monophyletic assemblages were revealed, one was restricted to limestone ares of Hispaniola and was sister to a clade with two monophyletic genera, Lasiocroton and Leucocroton. Morphological, vi biogeographical, and ecological data provided additional support for each of these three monophyletic assemblages. The Hispaniolan taxa were accommodated in a new genus with four species: Garciadelia. Leucocroton includes the nickel hyperaccumulating species from serpentine soils of Cuba, while the rest of the species were placed in Lasiocroton, a genus restricted to limestone areas. The geographic history of the islands as well as the phylogenetic placement of the Leucocroton-alliance, allows the research to include the historical biogeography of the alliance across the islands of the Caribbean based on a dispersal-vicariance analysis.

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Allium ursinum L. in Germany – surprisingly low genetic variability

2012

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Allium ursinum s.l. is a widely spread species of the herb layer in beech forests throughout Europe. Little is known about its phylogenetic origin and its biogeographic history. Molecular genetic analyses of eleven populations from Germany were used to clarify the relationship between populations of A. ursinum s.l. and its relationship to several other species of the genus Allium. The study focused mainly on the Teutoburg Forest in Lower Saxony and the Franconian mountain area in Bavaria. Sequences of the nuclear internal transcribed spacer ITS, and the external transcribed spacer ETS, as well as the plastidic trn L‐rpl 32 and the trn L‐trn F spacer regions were compared. No variation was detected within the species. Even sequences of populations from Belfast, Ireland did not differ from populations of Germany. The closest relative to Allium ursinum s.l. turned out to be Allium moly or Allium scorzonerifolium from the section Molium. Random amplified polymorphic DNA fingerprinting was performed and revealed 29% polymorphic bands. Genetic distances of the populations within the Teutoburg Forest coincided with geographical distances. Three populations (Osnabrück Westerberg, Osnabrück Honeburg and Leer, East Frisia) out of eleven analysed populations were identified as garden escapes. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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A molecular phylogeny of the wild onions (Allium; Alliaceae) with a focus on the western North American center of diversity

Cited by 87 publications

References 19 publications

Cell Pattern and Ultrasculpture of Bulb Tunics of Selected Allium Species (Amaryllidaceae) and their Diagnostic Value

Cell Pattern and Ultrasculpture of Bulb Tunics of Selected Allium Species (Amaryllidaceae) and their Diagnostic Value

Phylogenetics, Conservation, and Historical Biogeography of the West Indian Members of the Adelieae (Euphorbiaceae)

Allium ursinum L. in Germany – surprisingly low genetic variability

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