How to get off the mismatch at the generic rank in African Podostemaceae?

Thiv, Mike; Ghogue, Jean-Paul; Grob, Valentin; Huber, Konrad A.; Pfeifer, Evelin; Rutishauser, Rolf

doi:10.1007/s00606-009-0214-4

Cited by 27 publications

(68 citation statements)

References 36 publications

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“…The scale-like leaves outnumber the compound leaves considerably. Only the compound leaves show helical or distichous phyllotaxis whereas the additional feuillettes are scattered irregularly (see [34] and literature cited therein). Other examples of angiosperms with two waves of leaf initiation along the same shoot axis are found in Gunnera tinctoria and allies (Gunneraceae within eudicots), and Hydrothrix gardneri (Pontederiaceae within monocots) [13].…”

Section: Shoot Apices With Two Waves Of Leaf Initiation May Have Arismentioning

confidence: 99%

Acacia (wattle) and Cananga (ylang-ylang): from spiral to whorled and irregular (chaotic) phyllotactic patterns – a pictorial report

Rutishauser

2016

Acta Soc Bot Pol

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Phyllotaxis, i.e., the arrangement of leaves around the stem and leaf-like organs inside flowers is regular in most vascular plants. Thus, developmental models usually explain regular phyllotactic patterns such as Fibonacci spirals and decussate/ whorled patterns that obey Hofmeister's rule: primordia form as far away as possible from previously initiated primordia. However, flowering plants showing at first Fibonacci spirals or whorled phyllotaxes may switch to other patterns that lack an obvious order and thus may be called irregular or even chaotic. Vegetative shoot tips of various Australian wattles (Acacia spp., Leguminosae in eudicots) and flower buds of ylang-ylang (Cananga odorata) and other Annonaceae (basal angiosperms) provide examples of irregular patterning. This pictorial report provides food for thought for scientists interested in phyllotaxis patterns beyond the usual spiral and whorled patterns. Emphasis is given on irregular phyllotaxes that occur in wild-type plants, mainly correlated with geometrical parameters such as leaf and stamen primordia that are very small as compared to the size of their apical meristems. They call for additional explanatory models, combining auxin-driven development with geometrical constraints and biophysical processes.

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Section: Shoot Apices With Two Waves Of Leaf Initiation May Have Arismentioning

confidence: 99%

Acacia (wattle) and Cananga (ylang-ylang): from spiral to whorled and irregular (chaotic) phyllotactic patterns – a pictorial report

Rutishauser

2016

Acta Soc Bot Pol

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“…bosii, and I. cristata, have been presented in detail by Moline et al (2007) and Thiv et al (2009). This information was part of their wider study of about ten species of African Podostemoideae.…”

Section: Morphologymentioning

confidence: 99%

“…Molecular phylogenetic sampling of African Podostemaceae has been only c. 30 % complete at species level (Schenk et al 2015). Thiv et al (2009) and Schenk et al (2015), have convincingly shown that Ledermanniella subg. Phyllosoma C.Cusset forms a well-supported clade of species that are sister to the rest of all other African Podostemaceae sampled, comprising Ledermanniella subg.…”

Section: Introductionmentioning

confidence: 99%

“…Phyllosoma (Thiv et al 2009, Schenk et al 2015, Cheek & Haba 2016a. Material has come to light representing new species which are published here together with a synoptic account and a key to all the species currently recognised.…”

Section: Introductionmentioning

confidence: 99%

“…This work has been compiled and updated by Rutishauser et al (2004) who recognise c. 85 species in 16 genera. Recently, combined morphological and molecular phylogenetic studies of African Podostemaceae have shown that Ledermanniella (as delimited by Cusset) is paraphyletic, including all other sampled genera of Podostemaceae recognised in Africa (Thiv et al 2009, employing plastid markers matK, trnD-trnT, rpoB-trnC in sampling 9 genera and 17 species of African Podostemaceae, and Schenk et al (2015), employing plastid markers matK, trnL, rpoB-trnC, ndhF, rbcL and matR in sampling 10 genera and 27 species of African Podostemaceae). Molecular phylogenetic sampling of African Podostemaceae has been only c. 30 % complete at species level (Schenk et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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