Floral Development and Phylogenetic Position of<i>Schismatoglottis</i>(Araceae)

Barabé, Denis; Lacroix, Christian; Bruneau, Anne; Archambault, Annie; Gibernau, Marc

doi:10.1086/380980

Cited by 26 publications

(26 citation statements)

References 29 publications

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“…This interpretation would be in agreement with the presence of common vegetative characters such as fenestrate and marginal leaf dissection (Hay 1992). Recent molecular data also point to a close phylogenetic relationship between Anaphyllopsis and Dracontium , 2004a, Cabrera et al 2008. One could hypothesize that in the family Lasoideae there was a shift between multimerous flowers (Dracontium) to tetramerous flowers (Anaphyllopsis).…”

Section: Figs 11-16supporting

confidence: 68%

“…Genera of the subfamily Aroideae are characterized by unisexual flowers, and have been investigated by a variety of authors from the perspective of floral anatomy, developmental morphology, and phylogeny (e.g. Engler and Krause 1912;Eyde et al 1967;Hotta 1971;Barahona Carvajal 1977;Uhlarz 1982Uhlarz , 1986French 1985aFrench , 1985bFrench , 1986Mayo 1986Mayo , 1989Buzgó 1994; Barabé et al , 2003Barabé et al , 2004aBarabé et al , 2004b. The developmental morphology of flowers has been particularly well documented in genera (Philodendron, Caladium) where there is a sterile male zone of flowers between the typical male and female floral zones Barabé et al 2004b or where such a zone is absent (Culcasia, Montrichardia) (Barabé and Lacroix 2001;Barabé and Bertrand 1996).…”

Section: Introductionmentioning

confidence: 99%

“…In the present study, we will assess whether the mode of development of flowers in Anaphyllopsis can be integrated into the developmental patterns already recognized in the basal Araceae, particularly in Dracontium, which is phylogenically closely related to Anaphyllopsis (Barabé et al , 2004aCabrera et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Developmental morphology of the flower of Anaphyllopsis americana and its relevance to our understanding of basal Araceae

Barabé

Lacroix

2008

Botany

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The inflorescence of Anaphyllopsis americana (Engler) A. Hay consists of more than 100 flowers arranged in recognizable spirals. Each flower has four broad tepals enclosing four stamens that are not visible prior to anthesis. The unilocular ovary contains one ovule and bears a discoid stigma. The floral primordia are first initiated on the upper portion of the inflorescence. At an early stage during their development, the floral primordia have a circular shape. Two lateral tepals are initiated nearly simultaneously followed by two median tepals. After their initiation, each stamen is associated with a tepal of the same radius; the two lateral stamens are initiated first, directly opposite to the lateral tepals. The unilocular nature of the ovary is clearly visible during the early stages of development of the gynoecium. At dehiscence, anther wall raphides are present in anther locules and are mixed with pollen. The mode of floral development observed in Anaphyllopsis is similar to that reported for Anthurium jenmanii Engl. However, this similarity in mode of development may be linked to structural constraints rather than phylogenetic relationships. The presence of a few pentamerous flowers in the inflorescence of Anaphyllopsis suggests a possible relationship with Dracontium. This would be in accordance with recent molecular studies showing that Anaphyllopsis and Dracontium are closely related.Résumé : L'inflorescence de l'Anaphyllopsis americana (Engler) A. Hay comporte plus de cent fleurs arrangées en spirale évidente. Chaque fleur possède quatre larges tépales entourant 4 étamines qui demeurent invisibles jusqu'à l'anthèse. L'ovaire uniloculaire contient un ovule et porte un stigmate discoïde. Les primordiums floraux apparaissent d'abord sur la partie supérieure de l'inflorescence. Au début de leur développement, les primordiums floraux montrent une forme circulaire. Deux tépales latéraux amorcent leur formation presque simultanément, suivis de deux tépales médians. Après leur initiation, chaque étamine s'associe à un tépale de même rayon; les deux étamines latérales se forment d'abord, en position directement opposée aux tépales latéraux. On identifie facilement la nature uniloculaire de l'ovaire au cours des premiers stades du développement du gynécée. À la déhiscence, on observe les raphides des parois des anthères dans les loges des anthères, se mélangeant au pollen. Le mode de développement floral observé chez l'Anaphyllopsis correspond à celui dé-crit pour l'Anthurium jenmanii Engl. Cependant, cette similarité du mode de développement peut être liée à des contraintes structurales plutôt qu'à des relations phylogénétiques. La présence de quelques fleurs pentamères dans l'inflorescence suggère une relation possible aux Dracontium. Ceci correspondrait avec les récentes études moléculaires montrant que les Anaphyllopsis et les Draconium sont étroitement apparentés.

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Section: Figs 11-16supporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

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Developmental morphology of the flower of Anaphyllopsis americana and its relevance to our understanding of basal Araceae

Barabé

Lacroix

2008

Botany

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“…The flowering cycle of this species is similar to that commonly found in taxa with inflorescences consisting of unisexual flowers that are pollinated by beetles. The results of this study demonstrate that although inflorescences of bisexual flowers appear earlier in the evolution of Araceae (Barabé et al 2004), they can display a pollination mechanism similar to those present in more recent taxa.…”

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confidence: 55%

Pollination ecology of Monstera obliqua (Araceae) in French Guiana

2007

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Data on pollination ecology of Araceae are still scarce and most concern species belonging to the subfamily Aroideae (García-Robledo et al. 2004, Gibernau 2003, Ivancic et al. 2004, 2005; Maia & Schlindwein 2006). In this subfamily, inflorescences consist of unisexual flowers: female flowers are located in the lower portion and the male flowers are in the upper portion of the inflorescence (Mayo et al. 1997). In the documented neotropical Aroideae, pollinators are nocturnal beetles and pollination mechanisms take place within a floral chamber during a short flowering cycle (generally 24–48 h) with floral rewards (sterile flowers rich in proteins and/or lipids) for the beetle pollinators, the secretion of resin to secure pollen on the pollinator, and the production of heat and odours (Chouteau et al. 2007, García-Robledo et al. 2004, Gibernau & Barabé 2002, Gibernau et al. 1999, 2000, 2003; Maia & Schlindwein 2006, Young 1986).

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“…For comparison with Alismatales (14 families), I chose the Araceae, a basally-diverging family in the Alismatales phylogeny Chase et al 2006), and within the Araceae, I chose Gymnostachys, Symplocarpus, Lysichiton, and Orontium, which constitute a basallydiverging clade in the Araceae phylogeny (Tam et al 2004;Barabé et al 2004). Not all embryological features are plesiomorphic for the family or order and are useful for comparison with other orders, but some could be.…”

Section: Comparisons With Early-diverging Monocots Acorales and Alismmentioning

confidence: 99%

Embryology of Japonolirion (Petrosaviaceae, Petrosaviales): a comparison with other monocots

Tobe

2008

J Plant Res

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Japonolirion osense, the sole species of the genus, endemic to Japan, which is placed together with Petrosavia in the Petrosaviaceae and the order Petrosaviales, is still poorly known with respect to systematic characters. Here I present an embryological study of the anther, ovule, and seed of J. osense. Japonolirion is characterized by a glandular anther tapetum, simultaneous cytokinesis in the microspore mother cell, two-celled mature pollen grains, anatropous and crassinucellate ovules, a two-cell-layered nucellar cap formed early in ovule development, antipodal cells hypertrophied in post-fertilization stages, the ab initio cellular mode of endosperm formation, and exotegmic seeds. Comparisons with the basal monocots Acorus (Acorales) and Araceae (Alismatales), and with the more derived monocots Nartheciaceae (Dioscoreales) and Velloziaceae/Triuridaceae (Pandanales), showed that Japonolirion is clearly distinct from those basal and more derived monocots, supporting a distinct position for Petrosaviaceae or Petrosaviales within the monocots. Extensive comparisons further suggest that the two-cell-layered nucellar cap, whose cells are rich in cytoplasm at the time of fertilization in Japonolirion and thus obviously function as the obturator, is likely to be a common characteristic of the basal monocots and may even be a link with the magnoliids.

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Floral Development and Phylogenetic Position ofSchismatoglottis(Araceae)

Cited by 26 publications

References 29 publications

Developmental morphology of the flower of Anaphyllopsis americana and its relevance to our understanding of basal Araceae

Developmental morphology of the flower of Anaphyllopsis americana and its relevance to our understanding of basal Araceae

Pollination ecology of Monstera obliqua (Araceae) in French Guiana

Embryology of Japonolirion (Petrosaviaceae, Petrosaviales): a comparison with other monocots

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