Differentiation of perianth organs in Nymphaeales

Warner, Kate A.; Rudall, Paula J.; Frohlich, Michael W.

doi:10.1002/tax.574006

Cited by 18 publications

(28 citation statements)

References 53 publications

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“…The morphology of the floral epidermis and degree of differentiation between the epidermis of studied organ series show a clear pattern between different groups of species. All species investigated present a differentiation between the outer sepaloid sepal surface and the other surfaces, as already noted by Warner et al (2008Warner et al ( , 2009). However, this sepaloid surface differs in some ways between Euryale and Victoria, where it is densely covered in trichomes and hydropotes, and the species of Nymphaea, where it is not.…”

Section: Discussionsupporting

confidence: 77%

“…Our observations confirm what Warner et al . (, ) observed, and underline the necessity for an approach to gene expression study that would also take into consideration the spatial distribution of floral regulator expression in the single organs. The strong differentiation of the organ series in V. cruziana and E. ferox , on the other hand, demonstrates a more sophisticated system of regulation, at least with regard to epidermal morphology.…”

Section: Discussionmentioning

confidence: 97%

“…All species investigated present a differentiation between the outer sepaloid sepal surface and the other surfaces, as already noted by Warner et al . (, ). However, this sepaloid surface differs in some ways between Euryale and Victoria , where it is densely covered in trichomes and hydropotes, and the species of Nymphaea, where it is not.…”

Section: Discussionmentioning

confidence: 99%

“…We used our observations as well as data compiled from the literature (Endress ; Warner et al . ; Zini et al . ) to code epidermal characters at the generic level for Victoria, Euryale and Nuphar, at the familial level for Cabombaceae, and the subgeneric level for Nymphaea .…”

Section: Methodsmentioning

confidence: 99%

“…We used our observations as well as data compiled from the literature (Endress 2008;Warner et al 2008;Zini et al 2017) to…”

Section: Ancestral Character State Reconstructionmentioning

confidence: 99%

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Disentangling historical signal and pollinator selection on the micromorphology of flowers: an example from the floral epidermis of the Nymphaeaceae

Coiro

Lumaga

2018

Plant Biol J

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The family Nymphaeaceae includes most of the diversity among the ANA-grade angiosperms. Among the species of this family, floral structures and pollination strategies vary. The genus Victoria, as well as subgenera Lotos and Hydrocallis in Nymphaea, present night-blooming, scented flowers pollinated by scarab beetles. Such similar pollination strategies have led to macromorphological similarities among the flowers of these species, which could be interpreted as homologies or convergences based on different phylogenetic hypotheses about the relationships of these groups. We employed scanning electron microscopy of floral epidermis for seven species of the Nymphaeaceae with contrasting pollination biology to identify the main characters of the floral organs and the potential homologous nature of the structures involved in pollinator attraction. Moreover, we used transmission electron microscopy to observe ultrastructure of papillate-conical epidermis in the stamen of Victoria cruziana. We then tested the phylogenetic or ecological distribution of these traits using both consensus network approaches and ancestral state reconstruction on fixed phylogenies. Our results show that the night-blooming flowers present different specialisations in their epidermis, with V. cruziana presenting the most elaborate floral anatomy. We also identify for the first time the presence of conical-papillate cells in the order Nymphaeales. The epidermal characters tend to reflect phylogenetic relationships more than convergence due to pollinator selection. These results point to an independent and parallel evolution of scarab pollination in Nymphaeaceae and demonstrate the promise of floral anatomy as a phylogenetic marker. Moreover, they indicate a degree of sophistication in the anatomical basis of cantharophilous flowers in the Nymphaeales that diverges from the most simplistic views of floral evolution in the angiosperms.

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Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…We used our observations as well as data compiled from the literature (Endress 2008;Warner et al 2008;Zini et al 2017) to…”

Section: Ancestral Character State Reconstructionmentioning

confidence: 99%

See 3 more Smart Citations

Disentangling historical signal and pollinator selection on the micromorphology of flowers: an example from the floral epidermis of the Nymphaeaceae

Coiro

Lumaga

2018

Plant Biol J

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Phylogeny and evolutionary patterns in Nymphaeales: integrating genes, genomes and morphology

Borsch

Löhne

Wiersema³

2008

TAXON

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The Nymphaeales (water lilies) clade has diverged as the second branch in the tree of angiosperms and is composed of the three families Cabombaceae, Nymphaeaceae and Hydatellaceae. Extant species diversity is constituted by 82 species, about half of which belong to the nearly globally distributed genus Nymphaea. DNA sequence datasets of multiple non‐coding and rapidly evolving regions from all three genomic compartments (ca. 8 kb of sequence per taxon) for a dense sampling of Nymphaeales, Austrobaileyales and Amborella were examined. In an attempt to review the literature on water lilies of the past decades a matrix comprising 62 morphological characters was generated. The crown group of extant Nymphaeales is supported by a series of synapomorphies, several of which have evolved in line with the acquisition of herbaceous habits and adaptations to an aquatic lifestyle such as the loss of cambium and sclerenchyma. Further innovations evolved subsequently within the diversification of the water lily crown group such as hydropotes, or an aril as floating device for the seeds in core Nymphaeaceae that have evolved fruits ripening under water. Both Hydatellaceae and Cabombaceae exhibit many derived features that in part may be explained as adaptations to anemophily. The Nymphaeaceae are supported as monophyletic by most character partitions, including morphology, as are Nuphar and Barclaya as successive sisters to the core Nymphaeacae (Nymphaea, Ondinea, Euryale, Victoria). Parsimony analysis of the morphological dataset alone yielded a well resolved and statistically supported tree. Ondinea appears as a close relative of the Australian subg. Anecphya clade within Nymphaea by all genomic compartments and morphology. Earlier hypotheses of Nymphaea being paraphyletic to the Euryale‐Victoria clade are inferred in nuclear trees, albeit with low support. Different morphological characters equivocally support a position of the Euryale‐Victoria clade as sister to the subg. Hydrocallis‐Lotus clade within Nymphaea or as sister to all species of Nymphaea. The diversification of the water lily clade is further characterized by a trend towards increased complexity in floral architecture.

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Development and anatomy of petals with specialized nectar holder and pollen container in Fumarioideae (Papaveraceae)

Lv,

Wang,

Wang

et al. 2024

Planta

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Differentiation of perianth organs in Nymphaeales

Cited by 18 publications

References 53 publications

Disentangling historical signal and pollinator selection on the micromorphology of flowers: an example from the floral epidermis of the Nymphaeaceae

Disentangling historical signal and pollinator selection on the micromorphology of flowers: an example from the floral epidermis of the Nymphaeaceae

Phylogeny and evolutionary patterns in Nymphaeales: integrating genes, genomes and morphology

Development and anatomy of petals with specialized nectar holder and pollen container in Fumarioideae (Papaveraceae)

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