Floral Anatomy of Paepalanthoideae (Eriocaulaceae, Poales) and their Nectariferous Structures

Rosa, Michele Marcelino; Scatena, Vera Lúcia

doi:10.1093/aob/mcl231

Cited by 39 publications

(46 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Our results show that the nectariferous stylar appendages that characterize some Xyridaceae (except Xyris and Achlyphila: Table 3) are vascularized by dorsal carpellary bundles and have a similar early ontogeny. In Eriocaulaceae, nectariferous stylar appendages occur only in subfamily Paepalanthoideae; they are absent from Eriocauloideae (Stützel 1998;Rosa and Scatena 2007). Stützel (1990) observed that the stylar appendages of Abolboda share similar ontogeny with those of some Eriocaulaceae.…”

Section: Floral Anatomy In Xyridaceae 1303mentioning

confidence: 99%

“…Thus, the alternative hypothesis, that the stylar appendages are homologous between the two families, appears unlikely based on our data, but cannot be entirely discounted pending further comparative data on Eriocaulaceae. Because the stylar appendages produce nectar in both families (Rosa and Scatena 2007;Oriani and Scatena 2012), it is plausible to interpret them as a convergent character.…”

Section: Floral Anatomy In Xyridaceae 1303mentioning

confidence: 99%

“…The style is typically hollow in monocots, including Eriocaulaceae (Rosa and Scatena 2007) and Mayacaceae (Venturelli and Bouman 1986;Carvalho et al 2009). In hollow styles, pollen tubes grow from the stigma to the ovary over the surface of the epidermis through a thin layer of mucilage (e.g.…”

Section: Floral Anatomy In Xyridaceae 1303mentioning

confidence: 99%

“…However, the presence of vascularized staminodes in Xyris and some species of Abolboda appears to refute this hypothesis. The relatively small flowers of Eriocaulaceae (the sister family to Xyridaceae) lack elaborate vasculature, so that the petals and sepals each receive a single tiny vascular bundle (Stützel 1998;Rosa and Scatena 2007). Remizowa et al (2012) suggested that the trimerous condition that predominates in monocot flowers could allow a broader base for each petal than in pentamerous flowers, perhaps facilitating the occurrence of three and multi-traced petals in some monocots.…”

Section: Comparative Floral Vasculaturementioning

confidence: 99%

“…The absence of septal nectaries in both Xyridaceae and Eriocaulaceae has prompted some authors to speculate that nectaries have evolved de novo in xyrids from ancestors that lacked septal nectaries (Linder and Rudall 2005). Both Abolbodoideae (Xyridaceae) and Paepalanthoideae (Eriocaulaceae) have flowers with stylar appendages that produce nectar, which is used as a resource by insect pollinators (Rosa and Scatena 2007;Oriani et al 2009;Scatena 2011, 2012).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Floral ontogeny and vasculature in Xyridaceae, with particular reference to staminodes and stylar appendages

et al. 2017

View full text Add to dashboard Cite

We provide a detailed comparative study of floral ontogeny and vasculature in Xyridaceae, including Xyris, Abolboda and Orectanthe. We evaluate these data in the context of a recent well-resolved phylogenetic analysis of Poales to compare floral structures within the xyrid clade (Xyridaceae and Eriocaulaceae). Xyrids are relatively diverse in both flower structure and anatomy; many species incorporate diverse and unusual floral structures such as staminodes and stylar appendages. Xyridaceae possess three generally epipetalous stamens in a single whorl; the ''missing'' stamen whorl is either entirely absent or transformed into staminodes. Fertile stamens each receive a single vascular bundle diverged from the median petal bundle. In Xyris, the stamen bundle diverges at the flower base, but it diverges at upper flower levels in both Abolboda and Orectanthe. In species of Abolboda that possess staminodes, staminode vasculature is closely associated with the lateral vasculature of each petal. Despite the likely sister-group relationship between Eriocaulaceae and Xyridaceae, our character optimization indicates that the stylar appendages that characterize some Xyridaceae (except Xyris and Achlyphila) are non-homologous with those of some Eriocaulaceae. On the other hand, it remains equivocal whether the loss of a fertile outer androecial whorl occurred more than once during the evolutionary history of the xyrid clade; this transition occurred either once followed by a reversal to fertile stamens in Eriocauloideae and staminodes in some Xyridaceae, or twice independently within both Xyridaceae and Eriocaulaceae.

show abstract

Section: Floral Anatomy In Xyridaceae 1303mentioning

confidence: 99%

Section: Floral Anatomy In Xyridaceae 1303mentioning

confidence: 99%

Section: Floral Anatomy In Xyridaceae 1303mentioning

confidence: 99%

Section: Comparative Floral Vasculaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Floral ontogeny and vasculature in Xyridaceae, with particular reference to staminodes and stylar appendages

et al. 2017

View full text Add to dashboard Cite

show abstract

A comprehensive phylogenetic analysis of Eriocaulaceae: Evidence from nuclear (ITS) and plastid (psbA-trnH and trnL-F) DNA sequences

Andrade

Giulietti

Rapini

et al. 2010

TAXON

View full text Add to dashboard Cite

The Eriocaulaceae are easily recognized because of the small unisexual flowers in long-pedunculate heads and spiraperturate pollen grains. Their monophyly has never been disputed but internal relationships within the family have not been broadly explored and genera are typically distinguished by few floral characters. Here, we present the first comprehensive phylogenetic study of Eriocaulaceae based on individual and combined molecular datasets, including the plastid psbA-trnH and trnL-F and the nuclear ITS. Results are largely congruent among DNA regions and support the internal dichotomy between the two subfamilies: Eriocauloideae and Paepalanthoideae. Eriocaulon and Leiothrix are strongly supported as monophyletic, whereas Paepalanthus, Blastocaulon, and Syngonanthus are not monophyletic. The phylogenetic nature of Actinocephalus is not resolved and Lachnocaulon, Mesanthemum, Philodice, Rondonanthus, and Tonina (monospecific) are represented in our analyses by a single species each. Based on our results, we suggest two principal generic realignments in the family. The first is the division of Syngonanthus in two genera: Syngonanthus s.str., including Philodice (conserving the former name against the latter), and Comanthera, which is being reinstated to include two sections segregated from Syngonanthus: S. sect. Eulepis and S. sect. Thysanocephalus. The second realignment suggested is the amalgamation of Actinocephalus, Blastocaulon, Lachnocaulon, and Tonina into Paepalanthus s.l. Three 'stat. nov.' within Paepalanthus are published (P. ser. Leptocephali, P. ser. Rosulati, and P. ser. Dimeri).

show abstract

Reestablishment and new circumscription of Comanthera (Eriocaulaceae)

Parra¹,

Giulietti

Andrade

et al. 2010

TAXON

View full text Add to dashboard Cite

Previous morphological and molecular studies indicate that Syngonanthus is polyphyletic. Syngonanthus sect. Syngonanthus and S. sect. Carphocephalus as well as Philodice cluster in a monophyletic clade and are included in Syngonanthus. Syngonanthus sect. Eulepis and S. sect. Thysanocephalus are also a monophyletic group that can be used to reestablish Comanthera with a new circumscription and two subgenera: Comanthera subg. Comanthera and C. subg. Thysanocephalus. Characterization of Comanthera and the necessary nomenclatural combinations are provided in this paper. The genus will now include 38 species, six varieties and four subspecies. Of the species, 34 are endemic to Brazil, occurring especially in the Espinhaço Range in Minas Gerais and Bahia. Three species extend from Brazil into other countries of northern South America and one is found only in Venezuela and Guyana. In this paper we also propose 43 new synonyms, 39 new combinations, one name change, three changes of status, eight lectotypifications and one neotypification.

show abstract

Floral Anatomy of Paepalanthoideae (Eriocaulaceae, Poales) and their Nectariferous Structures

Cited by 39 publications

References 7 publications

Floral ontogeny and vasculature in Xyridaceae, with particular reference to staminodes and stylar appendages

Floral ontogeny and vasculature in Xyridaceae, with particular reference to staminodes and stylar appendages

A comprehensive phylogenetic analysis of Eriocaulaceae: Evidence from nuclear (ITS) and plastid (psbA-trnH and trnL-F) DNA sequences

Reestablishment and new circumscription of Comanthera (Eriocaulaceae)

Contact Info

Product

Resources

About