Molecular phylogenetic position of podostemaceae, a marvelous aquatic flowering plant family

Ueda, Kazumitsu; Hanyuda, Takeaki; Nakano, Aiko; Shiuchi, Toshiaki; Seo, Akihiro; Okubo, Hirobumi; Hotta, Mitsuru

doi:10.1007/bf02506847

Cited by 15 publications

(6 citation statements)

References 20 publications

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“…The Podostemaceae as molecular misfits-The Podostemaceae have to be regarded as morphological misfits (Bell, 1991;Rutishauser, 1995Rutishauser, , 1997. Meanwhile, molecular data for various Podostemaceae genera were presented by Les, Philbrick, andNovelo (1997, 1998), as well as Ueda et al (1997). Similar to Ceratophyllaceae (Qiu et al, 1993;Sytsma and Baum, 1996) the Podostemaceae turn out to be molecular misfits as compared to other angiosperms.…”

Section: Molecular and Nonmolecular Criteria Elucidating The Phylogenmentioning

confidence: 99%

“…Fossil evidence, however, is lacking for the Podostemaceae. In spite of the problem of long-branch attraction, Les, Philbrick, and Novelo (1997) as well as Ueda et al (1997) agree that it is best to accept the Crassulaceae, Haloragaceae, and even Hydrostachyaceae as sister groups of the Podostemaceae. This coincides with the classical view that the Podostemaceae belong to the Rosidae clade (Warming, 1890;Engler, 1930;van Royen, 1951).…”

Section: Molecular and Nonmolecular Criteria Elucidating The Phylogenmentioning

confidence: 99%

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The architecture of Mourera fluviatilis (Podostemaceae): developmental morphology of inflorescences, flowers, and seedlings

Rutishauser

Grubert

1999

American J of Botany

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Mourera fluviatilis from northern South America is a spectacular member of the Podostemaceae (river-weeds). Its raceme-like inflorescences are up to 64 cm long and have 40-90 flowers arranged in two opposite rows. Inflorescence development starts with the initiation of a double-sheathed (dithecous) bract in a terminal position. All lateral bracts (again dithecous) are initiated in basipetal order along the two flanks of the inflorescence. Each gap between two neighboring bracts contains a single flower. The flowers are bisexual, each with a whorl of 16-20 ligulate tepals and 14-40 stamens, which are arranged in one or two whorls. Floral development starts with the formation of a girdling primordium rim around a two-lobed primordial gynoecium. Stamen and tepal initiation is centrifugal on the girdling primordium. The anthers are introrse or extrorse, depending on stamen position. Seedlings develop two entire, threadlike cotyledons, followed by forked filamentous leaves, which arise from the plumular pole. The radicular pole of the hypocotyl develops into a claw-shaped holdfast that fixes the young plant to the rock. The developmental morphologies of Mourera fluviatilis and other members of the Mourera group (including Lonchostephus and Tulasneantha) fit well with the Podostemoideae bauplan known from other New World genera, such as Apinagia and Marathrum.

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Section: Molecular and Nonmolecular Criteria Elucidating The Phylogenmentioning

confidence: 99%

Section: Molecular and Nonmolecular Criteria Elucidating The Phylogenmentioning

confidence: 99%

The architecture of Mourera fluviatilis (Podostemaceae): developmental morphology of inflorescences, flowers, and seedlings

Rutishauser

Grubert

1999

American J of Botany

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“…Due to these ecological and morphological specializations, the phylogenetic relationships of Podostemaceae have long been controversial. Chloroplast rbcL sequence data deduced a phylogenetic relationship of Podostemaceae with Crassulaceae (Les et al, 1997 [24] ; Ueda et al, 1997 [44] ). By contrast, recent analyses of 18S rDNA alone, combined data of 18S rDNA/rbcL, and 18S rDNA/rbcL/atpB sequences for a great number of members of families including Crassulaceae suggested that Podostemaceae belong to a Malpighiales clade (Soltis et al, 1999 [36] , 2000 [37] ).…”

Section: Introductionmentioning

confidence: 99%

Infrafamilial Phylogeny of the Aquatic Angiosperm Podostemaceae Inferred from the Nucleotide Sequences of the matK Gene

2001

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The infrafamilial relationships of Podostemaceae were deduced from nucleotide sequences of the chloroplast matK gene. The matK phylogenetic analyses show that Podostemaceae are composed of two major clades that correspond to the subfamily Tristichoideae sensu stricto and Weddellina and the subfamily Podostemoideae. Weddellina, which has long been recognized as a member of the Tristichoideae, is sister to the Podostemoideae, supporting the classification that recognized a third subfamily Weddellinoideae. Malaccotristicha malayana and Terniopsis sessilis form a basal clade in Tristichoideae sensu stricto. Tristichoideae show a high morphological diversity and, surprisingly, a close relationship exists between Dalzellia zeylanica and Indotristicha ramosissima, which remarkably differ in their body plans. A few genera defined by particular characters, such as Synstylis and Torrenticola, merge into clades of other larger genera. The Podostemoideae taxa studied are composed of two American clades, an Asian‐Australian clade and a Madagascan clade, and may suggest that the subfamily perhaps originated in America and migrated to the Old World.

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“…Morphological and molecular data indicate that the Podostemaceae with their unique architecture are dicotyledons related to the Rosids (e.g. Malpighiales clade) within the Eudicots (Les, Philbrick & Novelo, 1997;Ueda et al, 1997;Soltis et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Developmental morphology of Apinagia multibranchiata (Podostemaceae) from the Venezuelan Guyanas

Rutishauser¹,

Grubert²

2000

Botanical Journal of the Linnean Society

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Apinagia (c. 50 spp.) is the largest genus of American Podostemaceae. Apinagia multibranchiata (Matth.) Royen is a haptophyte endemic to the Venezuelan Guyanas. It fits well with the Podostemoideae bauplan known from other New World genera, such as Marathrum and Mourera. Shoots arise in pairs from filamentous creeping adhesive roots. During the rainy season submerged vegetative shoots grow up to more than a metre long. They are normally unbranched and provided wihdistichously arranged leaves which are laterally flattened into one plane. The lanceolate leaves may show a fimbriate tip. Tufts of threads are found on the upper leaf surface which faces the sky. When the water recedes in December‐January, ascending reproductive shoots (up to 15 cm long) are formed which branch syrnpodially. The first module produces a variable number of leaves. Distal leaves are often double‐sheathed (dithecous). Their inner sheaths are fused into a tube that covers the first flower bud. Daughter modules arise from the outer sheaths of the distal leaves. These modules consisting of two double‐sheathed leaves and a flower are repeated giving rise to 2–15 stalked flowers. The flowers are entomophilous and provided with 6–29 pink stamens. Architecture and developmental morphology of A. multibranchiata are compared with other members of the genus.

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Molecular phylogenetic position of podostemaceae, a marvelous aquatic flowering plant family

Cited by 15 publications

References 20 publications

The architecture of Mourera fluviatilis (Podostemaceae): developmental morphology of inflorescences, flowers, and seedlings

The architecture of Mourera fluviatilis (Podostemaceae): developmental morphology of inflorescences, flowers, and seedlings

Infrafamilial Phylogeny of the Aquatic Angiosperm Podostemaceae Inferred from the Nucleotide Sequences of the matK Gene

Developmental morphology of Apinagia multibranchiata (Podostemaceae) from the Venezuelan Guyanas

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