Anatomical aspects of the gynoecium of species of Anthurium sect. Urospadix Engl. (Araceae, Alismatales)

Poli, Letícia Peres; Temponi, Lívia Godinho; Coan, Alessandra Ike

doi:10.1016/j.flora.2012.06.014

Cited by 5 publications

(10 citation statements)

References 21 publications

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“…The present study reveals the existence of two morphologically distinct zones, with an unequal timing of development: the stylar epidermis, which is formed by isodiametric cells, covered by an ornamented or unornamented cuticle, and presenting paracytic stomata that appears in Phase II, and the stigma, formed by secretory trichomes, which differentiates during Phase III. Although such evidence corroborates Poli et al (2012), the adjacent region described in the present study is considered as the style because it corresponds to the elongation and union of the carpel sides and apex.…”

Section: Figs 1-10 Gynoecial Ontogeny Of Anthurium Sect Urospadixsupporting

confidence: 77%

“…Urospadix. Compared with the previous studies on the floral anatomy of Anthurium (e.g., Carvajal 1977;Higaki et al 1984;Carvell 1989;Poli et al 2012), as well to the single ontogenetic study on this genus (Barabé and Lacroix 2008b), the present work describes, for the first time, the presence of an apical septum in the ovary of A. scandens and traces the floral ontogeny concomitantly by both SEM and LM. Using both techniques allowed the observation of the morphological changes associated with the anatomical ones, from the gynoecium primordium to its maturity.…”

Section: Discussionsupporting

confidence: 46%

“…Recently, considering ovarian septum features, the continuity between the transmitting tissue and the apical portion of the septum, and axile placentation, Poli et al (2012) suggested that the mature gynoecia in species of Anthurium presented symplicate and synascidiate zones. The results obtained here using SEM supply new data on the formation of these zones in the gynoecia of this genus, clarifying and reasserting these features in these mature floral organs, in addition to complementing the ontogenetic data on Pothoideae and on Araceae as a whole.…”

Section: Figs 1-10 Gynoecial Ontogeny Of Anthurium Sect Urospadixmentioning

confidence: 99%

“…Different terminologies are used to describe the apical portion of the gynoecium: Barabé and Lacroix (2008b) describe it as the stigma, whereas Poli et al (2012) differentiate it into the stigma and the adjacent region. The present study reveals the existence of two morphologically distinct zones, with an unequal timing of development: the stylar epidermis, which is formed by isodiametric cells, covered by an ornamented or unornamented cuticle, and presenting paracytic stomata that appears in Phase II, and the stigma, formed by secretory trichomes, which differentiates during Phase III.…”

Section: Figs 1-10 Gynoecial Ontogeny Of Anthurium Sect Urospadixmentioning

confidence: 99%

“…Furthermore, few studies have investigated the mature floral organs of Anthurium with a focus on floral anatomy (Carvajal 1977;Carvell 1989;Higaki et al 1984), floral vasculature (Barabé et al 1984), embryology (Campbell 1900;Grayum 1991;Matsumoto et al 1998), and mature gynoecium (French 1987;Poli et al 2012). Poli et al (2012) were the first to characterize the anatomy of mature gynoecia of Anthurium sect. Urospadix, indicating the existence of a truly differentiated style, and an ovarian septum that does not reach the apical portion of the locule.…”

Section: Introductionmentioning

confidence: 99%

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Gynoecial ontogeny of Anthurium: contributions for floral developmental studies in Araceae (Alismatales)

Peres

Temponi

Ike

2015

Botany

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Studies on floral development have widened the knowledge on the floral morphology of Araceae, particularly in genera delimited through classical taxonomic treatments. In Pothoideae, floral ontogenetic studies are limited to some representatives of Pothoidium Schott and Pothos L. and only one species of Anthurium Schott, with no focus on gynoecium. This background reveals a lack of ontogenetic data on the largest genus in the clade. This paper presents gynoecial ontogeny of species circumscribed in different sections of Anthurium, describes gynoecial developmental patterns, and evaluates the relevance of ontogenetic characteristics in the taxonomy of the sections studied. New data for the Araceae include the recognition of four floral developmental phases, the carpellary nature of the ovarian septum, and the development of the symplicate and synascidiate zones of the gynoecium. The apical septum described in Anthurium scandens (Aubl.) Engl. is first reported for the genus in this study. We also highlight the importance of these ontogenetic data as new information for the Pothoideae within Araceae and to understand the notable phases of floral development in the reproductive biology of Anthurium.Résumé : Les études du développement floral ont permis d'élargir la connaissance de la morphologie florale des Araceae, particulièrement les genres délimités par les études taxonomiques classiques. Chez les Pothoideae, les études d'ontogénie florale sont limitées à certains représentants des Pothoidium Schott et des Pothos L., et à une seule espèce d'Anthurium Schott, sans cibler le pistil. Ce contexte met en évidence un manque de données ontogéniques sur le genre le plus important du clade. Cet article présente l'ontogénie du pistil d'espèces limitées à différentes sections des Anthurium, décrit les patrons développementaux du pistil et évalue la pertinence des caractéristiques ontogéniques dans la taxonomie des sections étudiées. Les nouvelles données portant sur les Araceae comprennent la reconnaissance de quatre phases développementales florales, la nature carpellaire du septum ovarien et le développement de la zone du paracarpe du pistil. Le septum apical décrit chez Anthurium scandens (Aubl.) Engl. est rapporté ici pour la première fois chez ce genre. Les auteurs soulignent aussi l'importance de ces données ontogéniques en tant qu'information inédite relativement aux Pothoideae à l'intérieur des Araceae, et afin de comprendre les principales phases du développement floral dans la biologie de la reproduction d'Anthurium. [Traduit par la Rédaction] Mots-clés : septum apical, pistil, septum ovarien, Pothoideae.

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Section: Figs 1-10 Gynoecial Ontogeny Of Anthurium Sect Urospadixsupporting

confidence: 77%

Section: Discussionsupporting

confidence: 46%

Section: Figs 1-10 Gynoecial Ontogeny Of Anthurium Sect Urospadixmentioning

confidence: 99%

Section: Figs 1-10 Gynoecial Ontogeny Of Anthurium Sect Urospadixmentioning

confidence: 99%