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

Oriani, Aline; Scatena, Vera Lúcia

doi:10.1007/s00606-012-0721-6

Cited by 21 publications

(31 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The structure of the middle layer in the mature anther proved to be of interest in the comparison among the species since, by remaining in the anthers, its cells also developed fibrous thickenings. The permanence of the middle layer with thickenings in the mature anter is common and has been reported in other monocot families, such as Rapateaceae (Oriani & Scatena 2013) and Commelinaceae (Hardy et al 2000), despite being unidentified in Dyckia and other Bromeliaceae. It probably aids in anther dehiscence together with the endothecium, due to the presence of fibrous thickening.…”

Section: Resultsmentioning

confidence: 63%

Stamen morphoanatomy of Dyckia Schult.f. (Bromeliaceae, Pitcairnioideae) species: new data for taxonomic use

et al. 2016

View full text Add to dashboard Cite

Th is study presents a morphoanatomical analysis of Dyckia ibicuiensis, D. polyclada and D. racinae stamens. Flowers at anthesis were desiccated and their stamens were processed using common microtechniques for light microscopic analysis. Morphologically, the androecium in these species is diff erentiated by the disposition of the stamens around the gynoecium and by general anther characteristics. Included stamens, with antesepalous fi laments diff erent from those of the antepetalous, anthers in a radial disposition, always curved, and sporangia facing the gynoecium characterize D. ibicuiensis and D. racinae. Th is confi guration results from the fi lament connation, as well as special anatomical characteristics of the anthers, such as the connective with thickenings. In addition, these species are diff erentiated by the U-shaped thickening in the endothecium. D. polyclada is characterized by its small, free and exserted stamens, with a very short common tube, its anthers, that are not curved or organized around the gynoecium, and its divergent sporangia. Th e anatomical and morphological characteristics identifi ed here are important for characterization of these species. Considering that the androecium is important in the delimitation of Dyckia, the increased use of these data should be equally important for other species and infrageneric groupings.

show abstract

Section: Resultsmentioning

confidence: 63%

Stamen morphoanatomy of Dyckia Schult.f. (Bromeliaceae, Pitcairnioideae) species: new data for taxonomic use

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Never theless, in most of the species studied here the cortex of the inflorescence axis is not defined and the vascular bundles are randomly distributed in the parenchyma. The presence of silica bodies, a common characteristic of leaves and inflorescence axes of all studied species, was also observed in other organs of Rapateaceae, such as stems, bracts and flowers (Carlquist 1966, Stevenson et al 1998, Oriani and Scatena 2012). Carlquist (1966 used the presence of silica cells associated with subepidermal fiber strands in the stem to characterize the subfamily Rapateoideae.…”

Section: Discussionmentioning

confidence: 65%

“…In the literature, studies on Rapateaceae are scarce and include taxonomy (Maguire 1958, 1965, Stevenson et al 1998, Berry 2004, pollen morphology (Carlquist 1961), anatomy of roots, leaves, stems and inflorescence axes (Carlquist 1966, Ferrari et al 2014), embryology (Venturelli and Bouman 1988, floral anatomy (Oriani and Scatena 2012), and phylogeny (Givnish et al 2000(Givnish et al , 2004.…”

Section: Introductionmentioning

confidence: 99%

Leaf and inflorescence axis anatomy of Brazilian species of Rapateoideae (Rapateaceae, Poales)

Daltin

Oriani

Scatena

2015

An. Acad. Bras. Ciênc.

Self Cite

View full text Add to dashboard Cite

The anatomy of leaves and inflorescence axes of Spathanthus (2 spp.), Rapatea (2 spp.), Cephalostemon (1 sp.), and Duckea (1 sp.) (Rapateoideae, Rapateaceae) was studied to identify useful characters for taxonomy. The cross-section shape of inflorescence axis differentiates the genera, while the cross-section shape and structure of leaf midrib has a specific value. The following characteristics are exclusive of Spathanthus: silica cells randomly distributed in the leaf epidermis; plicate chlorenchyma in the leaf blade; presence of fiber bundles in the mesophyll and in the inflorescence axis parenchyma. Spathanthus is also distinguished by the number, type and distribution of vascular bundles in the inflorescence axis. The genus Rapatea is characterized by the presence of stomata and silica cells only on the abaxial epidermis of the leaves and chlorenchyma composed of arm cells in the leaf blade. Characteristics with diagnostic value for Cephalostemon riedelianus are: leaf epidermal cells with straight to slightly sinuous walls in frontal view, inflorescence axes presenting a defined cortex, fiber bundles facing the larger vascular bundles and a fistulous pith. The anatomical characteristics of the leaves and inflorescence axes thus proved to be of taxonomic value in generic and specific levels. They are also useful to differentiate Rapateoideae from other subfamilies of Rapateaceae.

show abstract

“…Ainda na região do ovário, a presença do tecido obturador é outro caráter que vem sendo registrado em algumas famílias de Poales, como Rapateaceae (Oriani & Scatena 2013), Juncaceae , Cyperaceae (Goetghebeur 1998, Coan et al 2008 e Bromeliaceae (Sajo et al 2004, Fagundes & Mariath 2010. Tal tecido pode ter origem na placenta, no funículo, nos tegumentos ou no arilo e, em alguns casos, pode ter origem mista, como por exemplo a partir da placenta e do funículo, recebendo a denominação de tecido obturador placentário-funicular (Tilton & Horner Jr. 1980, Davis 1966, Rao 1959.…”

Section: Introductionunclassified

Anatomia floral de Aechmea distichantha Lem. e Canistropsis billbergioides (Schult. & Schult.f) Leme (Bromeliaceae)

Oliveira

Souza

Corrêa

et al. 2016

Hoehnea

View full text Add to dashboard Cite

-(Floral anatomy of Aechmea distichantha Lem. and Canistropsis billbergioides (Schult. & Schult.f) Leme (Bromeliaceae)). Aechmea Ruiz & Pav. and Canistropsis (Mez) Leme belong to the subfamily Bromelioideae, which has the largest morphological diversity in Bromeliaceae. The flower buds of Aechmea distichantha Lem. and Canistropsis billbergioides (Schult. & Schult. f.) Leme were collected, fixed, and processed according to usual techniques in plant anatomy. The species share characteristics such as the presence of spherical crystals of silica in the epidermal cells of perianth; idioblasts with raphids; endothecium with annular thickening; and inferior ovary with axillary placentation. Nonvascular petal appendages were observed only in A. distichantha, arranged in pairs on each petal. Both species present a septal nectary, which nectar is rich in of proteins and carbohydrates. A placental obturator occurs in both species and histochemical tests revealed that the secretion produced by the obturator contains carbohydrates and proteins, probably related to the pollen tube guidance. Keywords: obturator, petal appendages, septal nectary RESUMO -(Anatomia floral de Aechmea distichantha Lem. e Canistropsis billbergioides (Schult. & Schult.f) Leme (Bromeliaceae)). Aechmea Ruiz & Pav. e Canistropsis (Mez) Leme pertencem à subfamília Bromelioideae, detentora da maior diversidade morfológica em Bromeliaceae. Botões florais de Aechmea distichantha Lem. e Canistropsis billbergioides (Schult. & Schult. f.) Leme foram coletados, fixados e processados conforme técnicas usuais em anatomia vegetal. As espécies compartilham características, tais como presença de cristais de sílica esféricos nas células epidérmicas do perianto; idioblastos contendo ráfides; endotécio com espessamento do tipo anelar e ovário ínfero com placentação axilar. Apêndices petaloides não vascularizados foram observados apenas em flores de A. distichantha, dispostos aos pares em cada pétala. Em ambas as espécies ocorre um nectário septal cuja secreção é rica em proteínas e carboidratos. Tecido obturador placentário está presente, e testes histoquímicos revelaram que a secreção produzida por este tecido contém proteínas e carboidratos, provavelmente, relacionados com o direcionamento do tubo polínico aos óvulos. Palavras-chave: apêndices petaloides, nectário septal, obturador

show abstract

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

Cited by 21 publications

References 38 publications

Stamen morphoanatomy of Dyckia Schult.f. (Bromeliaceae, Pitcairnioideae) species: new data for taxonomic use

Stamen morphoanatomy of Dyckia Schult.f. (Bromeliaceae, Pitcairnioideae) species: new data for taxonomic use

Leaf and inflorescence axis anatomy of Brazilian species of Rapateoideae (Rapateaceae, Poales)

Anatomia floral de Aechmea distichantha Lem. e Canistropsis billbergioides (Schult. & Schult.f) Leme (Bromeliaceae)

Contact Info

Product

Resources

About