A well-supported phylogenetic framework for the monocot order Alismatales reveals multiple losses of the plastid NADH dehydrogenase complex and a strong long-branch effect

Iles, William J. D.; Smith, Selena Y.; Graham, Sean W.

doi:10.1017/cbo9781139002950.002

Cited by 37 publications

(126 citation statements)

References 70 publications

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“…Molecular analysis of two plastids (matK, rbcL) and four mitochondrial genes (atp1, ccmB, cob, nad5) performed by Petersen, Seberg, Short, and Fortes (2014) also supported the hypothesis that the Cymodoceaceae is a monophyletic group. In contrast to the studies mentioned above, Les and Tippery (2013) and Iles, Smith, and Graham (2013) argued that the Cymodoceaceae family is a non-monophyletic group, which seems to be in agreement with our results. In other words, to clarify whether Cymodoceaceae is a non-monophyletic or monophyletic group, additional carefully combined nuclear and organellar sequence data are required in future work.…”

Section: Discussionsupporting

confidence: 92%

New insights into DNA barcoding of seagrasses

Nguyen

Höfler

Glasenapp

et al. 2015

Systematics and Biodiversity

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Taxonomists find some plant genera challenging because of the few morphological differences or unclear characters among closely related species, which leads to the misidentification of taxa. DNA barcoding is an approach to identify species by using short orthologous DNA sequences, known as 'DNA barcodes'. Concatenated rbcL and matK sequences are considered DNA barcodes for seagrasses. However, these markers are not applicable to all members of seagrasses at the species level, especially within the genus Halophila. Our previous studies indicated that the internal transcribed spacer (ITS) showed higher species resolution than the concatenated rbcL and matK sequences in the case of Halophila ovalis and closely related species. In this study, 26 ITS, two rbcL and two matK consensus sequences from 18 seagrass taxa belonging to four families collected in India, Vietnam, Germany, Croatia and Egypt were processed. Molecular ITS analysis resolved five clades. The results also indicate that the Cymodoceaceae family might be a non-monophyletic group. In conclusion, ITS could be applied as a DNA barcode for seagrasses instead of the rbcL/matK system previously proposed.

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Section: Discussionsupporting

confidence: 92%

New insights into DNA barcoding of seagrasses

Nguyen

Höfler

Glasenapp

et al. 2015

Systematics and Biodiversity

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“…The sequences come from 45 individuals representing 11 of the 18 African species, 9 of the 11 Asian species, 10 of the 13 Australian species and 12 of the 15 Madagascan species. Based on Les and Tippery (2013) and Iles et al (2013), Aponogetonaceae are the sister clade to the Cymodoceaceae, Juncaginaceae, Maundiaceae, Posidoniaceae, Potamogetonaceae, Ruppiaceae, Scheuchzeriaceae and Zosteraceae, and their divergence times were inferred by Iles et al (2013). Given this existing framework, we included Tetroncium magellanicum, a species of Juncaginaceae, Scheuchzeria palustris, the single species of Scheuchzeriaceae, and as a more distant outgroup Butomus umbellatus, the single species of Butomaceae.…”

Section: Taxon Samplingmentioning

confidence: 99%

“…Aponogeton has long been placed in its own family, the Aponogetonaceae, which together with 13 other families make up the Alismatales (Stevens, 2001 onwards), an order of mostly aquatic plants, including sea grasses (Cymodoceaceae, Posidoniaceae, Ruppiaceae, Zosteraceae), freshwater aquatics (Alismataceae, Aponogetonaceae, Butomaceae, Hydrocharitaceae and Potamogetonaceae which also include a few sea grasses), plants of marshy habitats (Juncaginaceae, Maundiaceae, Scheuchzeriaceae, Tofieldiaceae), and free-floating aquatics (most strikingly Lemnoideae and Pistia in the Araceae). The Aponogetonaceae are the sister clade to eight of these families, all species-poor with together just 180 species (Les and Tippery, 2013;Iles et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

A phylogeny and biogeographic analysis for the Cape-Pondweed family Aponogetonaceae (Alismatales)

Chen

Grimm

Wang

et al. 2015

Molecular Phylogenetics and Evolution

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“…Molecular phylogenetic data clearly support the segregation of Maundia as a monogeneric family, Maundiaceae (von Mering & Kadereit, ; Iles, Smith & Graham, ; Les & Tippery, ; Petersen et al ., ; Ross et al ., ). According to molecular data, Aponogetonaceae, Scheuchzeriaceae, Juncaginaceae and Maundiaceae form successive branches in a grade leading to a clade that includes Potamogetonaceae, Zosteraceae, Posidoniaceae, Ruppiaceae and Cymodoceaceae.…”

Section: Introductionmentioning

confidence: 80%

“…The core Alismatales clade consists of two sister groups: the tepaloid clade and the petaloid clade (Iles et al ., ; Ross et al ., ). Among the three families of the petaloid clade, the peripheral bundles occur in leaf petioles (except in smaller leaves) and in the midrib of large leaves in Alismataceae, along the length of the triquetrous leaves of Butomaceae and in some Hydrocharitaceae (e.g.…”

Section: Discussionmentioning

confidence: 99%

Vegetative morphology and anatomy ofMaundia(Maundiaceae: Alismatales) and patterns of peripheral bundle orientation in angiosperm leaves with three-dimensional venation

et al. 2016

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Collateral bundles with external position of the phloem characterize the stem vasculature of most seed plants. An earlier study highlighted the occurrence of inverted peripheral bundles in the leafless inflorescence peduncle of the rare Australian aquatic Maundia triglochinoides. This unusual feature and other morphological and molecular data supported the recognition of the monogeneric Maundiaceae, but the anatomy of the leaves, rhizomes and roots of Maundia remained unknown and is studied here. Maundia has an iterative sympodial growth with all shoots bearing five tubular cataphylls splitting longitudinally and simulating open sheaths at maturity and two (or three) linear foliage leaves without a conspicuous basal sheath. This morphology distinguishes Maundiaceae from all other Alismatales. The rhizome has an atactostele with collateral bundles of normal orientation; peripheral bundles are absent. Cataphylls have a series of normally oriented bundles. Foliage leaves are thick, bifacial, semi‐elliptical in cross‐section, with a thin subepidermal layer of chlorenchyma on both sides, accompanied by peripheral bundles with xylem facing outwards (thus abaxial peripheral bundles are inverted) and central large bundles of normal orientation. Strong anatomical similarity between leaves and peduncles is related to their shared function as assimilatory organs. As in angiosperm succulents, the three‐dimensional leaf venation in thick aquatic and helophyte leaves of Alismatales serves to reduce transport distances between veins and photosynthetic cells. In both cases, the patterns of orientation of peripheral bundles (with inverted adaxial or abaxial bundles) are unstable in large clades. These slender bundles cannot be used for the identification of unifacial leaves. Some anatomical characters express homoplastic similarities between Maundiaceae and Aponogetonaceae.

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A well-supported phylogenetic framework for the monocot order Alismatales reveals multiple losses of the plastid NADH dehydrogenase complex and a strong long-branch effect

Cited by 37 publications

References 70 publications

New insights into DNA barcoding of seagrasses

New insights into DNA barcoding of seagrasses

A phylogeny and biogeographic analysis for the Cape-Pondweed family Aponogetonaceae (Alismatales)

Vegetative morphology and anatomy ofMaundia(Maundiaceae: Alismatales) and patterns of peripheral bundle orientation in angiosperm leaves with three-dimensional venation

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