Floral anatomy of Bromeliaceae, with particular reference to the evolution of epigyny and septal nectaries in commelinid monocots

  title={Floral anatomy of Bromeliaceae, with particular reference to the evolution of epigyny and septal nectaries in commelinid monocots},
  author={M. Graça Sajo and Paula J. Rudall and Chrissie Prychid},
  journal={Plant Systematics and Evolution},
Abstract.Floral anatomy is described in ten genera of Bromeliaceae, including three members of subfamily Bromelioideae, three Tillandsioideae, and four genera of the polyphyletic subfamily Pitcairnioideae (including Brocchinia, the putatively basal genus of Bromeliaceae). Bromeliaceae are probably unique in the order Poales in possessing septal nectaries and epigynous or semi-epigynous flowers. Evidence presented here from floral ontogeny, vasculature, and the relative positions of nectary and… 

Floral development and anatomy of two species of Aechmea (Bromeliaceae, Bromelioideae)

Improved understanding of the floral development and morphology of Aechmea may help to explain the existence of polymorphic flowers in this genus and may have implications for studies on interactions with pollinators and systematics.

Floral structure in Licuala peltata (Arecaceae: Coryphoideae) with special reference to the architecture of the unusual labyrinthine nectary

It is shown that labyrinthine nectaries situated below the ovary, as described here, are not known from any other palms, but are similar to those of a few Bromeliaceae and, less strongly convoluted, some Haemodoraceae and Xanthorrhoeaceae.

Floral Anatomy of Xyrids (Poales): Contributions to Their Reproductive Biology, Taxonomy, and Phylogeny

The stylar appendages of Orectanthe (Xyridaceae) have been shown to be nectariferous and anatomically similar to those of Abolboda, differentiating these two genera from Xyris and confirming their placement in AbolBodoideae.

Floral evolution in the monocot family Nartheciaceae (Dioscoreales): evidence from anatomy and development in Metanarthecium luteo-viride Maxim.

Using scanning electron microscopy and light microscopy, the details of the flower structure, initiation, and development in Metanarthecium are described, which is unique amongst Nartheciaceae in possessing both an almost superior ovary and septal nectaries.

Ovary and ovule anatomy in the nidularioid complex and its taxonomic utility (Bromelioideae: Bromeliaceae)

The ovary and ovule anatomy of six species of the nidularioid complex belonging to Canistropsis, Canistrum, Edmundoa, Neoregelia, Nidularium and Wittrockia is described and these characters are used in a parsimony analysis of relationships.

Correlations between gynoecium morphology and ovary position in angiosperm flowers: Roles of developmental and terminological constraints

G.B. Kedrov (1969) suggested that there is a constraint for epigyny in plants with free carpels, and in taxa with disputable morphological interpretations, the gynoecium should be treated as pseudomonomerous (and not monomerous) if the ovary is inferior.

Flower and floral trichome morphology of species of Dyckia Schult. f. (Bromeliaceae, Pitcairnioideae), and their importance to species characterization and genus taxonomy

Flower morphological data useful for characterizing these three rare species of Dyckia, delimiting the genus and forming phylogenetic hypotheses are provided.

The taxonomic value of floral characters in Rapateaceae (Poales-Monocotyledons)

The floral anatomy of Cephalostemon, Monotrema, Rapatea, Spathanthus, and Stegolepis was studied for taxonomic purposes and shows a great number of similarities, corroborating their close relationship indicated in the phylogenetic analyses of the family.

Seed development and its relationship to fruit structure in species of Bromelioideae (Bromeliaceae) with fleshy fruits

These fruit and seed features are strategies for zoochory and provide evidence that each species studied is dispersed by a different type of animal.



Homologies of Inferior Ovaries and Septal Nectaries in Monocotyledons

  • P. Rudall
  • Biology
    International Journal of Plant Sciences
  • 2002
The complex pattern of evolution of gynoecial structures in monocots may be linked with the evolution of different pollination syndromes such as vibratile (buzz) pollination, the latter often associated with loss of septal nectaries.

Bromeliales, Related Monocots, and Resolution of Relationships among Bromeliaceae Subfamilies

Cladistics, phenetics, and the understanding of chromosomal evolution were applied to questions of the relationships and resemblances among the three subfamilies of the monocot family Bromeliaceae, finding Velloziaceae of Bromeliflorae appear to be the most likely to share the same common ancestor with Bromeliacae.

Morphological Variation of Some Floral Features of the Subfamily Pitcairnioideae (Bromeliaceae) and Their Significance in Pollination Biology

Scanning electron and light microscopy observations of wet-preserved flowers of Bromeliaceae subfamily Pitcaimioideae yield new information on the stigma, petal scales, and septal nectaries, and analysis of a wide range of floral features indicates that ornithophily, chiropterophily and entomophily exist in different Pitcairnioid lineages.

Evolution of Floral Nectaries in Iridaceae

New data on nectaries in Iridaceae are presented in combination with a literature review, in the context of systematics and pollination biology, reflecting the wide range of pollination syndromes within the family.

Reversal in Ovary Position from Inferior to Superior in the Haemodoraceae: Evidence from Floral Ontogeny

  • M. Simpson
  • Biology
    International Journal of Plant Sciences
  • 1998
It is proposed that the floral receptacular region of Wachendorfia and of other superior-ovaried Haemodoraceae is homologous with an ancestral inferior ovary with regard to position, development, and vasculature.

Phylogenetic Relationships in Subfamily Tillandsioideae (Bromeliaceae) Using ndhF Sequences

Poor resolution and weak branch support for many clades in the ndhF trees suggests that information from more highly variable sequences or the combining of data sets will be required for a clearer understanding of phylogenetic relationships in Tillandsioideae.

Stigma structure and variation in Bromeliaceae—Neglected taxonomic characters

Stigma architecture is proving to be a rich source of data for phylogenetic reconstruction and for classification at several infrafamilial levels and is consistent with Smith’s hypothesis of phylogenetic proximity of Tillandsioidae and Pitcairnioideae.

Status of Glomeropitcairnia within evolutionary history of Bromeliaceae

All available data including morphology and anatomy, as well as the cladistic analysis, support retention of Glomeropitcairnia within subfamily Tillandsioideae and suggest that the genus is sister taxon to the most recent common ancestor of the tillandsioid genera, Guzmania and Mezobromelia.

Development of ovule and seed in Rapateaceae

The structure of the ovules and/or seeds of twelve species of Rapateaceae were studied, some additional embryological characters also being recorded, and the family fits well into the Commelinales.

Phylogenetic relationships among Poaceae and related families as inferred from morphology, inversions in the plastid genome, and sequence data from the mitochondrial and plastid genomes.

Analysis of the morphological and molecular data places Poaceae in an unresolved relationship relative to several other taxa, including Joinvillea and Ecdeiocolea, while analysis of the molecular and combined data resolves Ec deiocolesa as sister of Poaceae, with joinvillea the sister of this group.