Dyckia pontesii (Bromeliaceae, Pitcairnioideae), uma nova espécie do Rio Grande do Sul, Brasil

Büneker, Henrique Mallmann; Witeck-Neto, Leopoldo; Soares, Kelen Pureza

doi:10.1590/2175-7860201566217

Cited by 2 publications

(2 citation statements)

References 8 publications

(8 reference statements)

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“…In older reviews and descriptions (Smith & Downs 1974;Smith 1988;1989) there are frequent contradictions related to the two whorls of stamens in flowers of Dyckia, especially regarding adnation. Therefore, we emphasize that in the species analyzed here both whorls are adnate to the petals, at least at the base, but the antesepalous stamens are also adnate to the sepals, an important detail of the floral architecture, used in more recent descriptions (Büneker et al 2015;. The gynoecium has a conduplicate-spiral stigma (Brown & Gilmartin 1989) and normally a superior ovary or, in some species, semi-inferior (Bernardello et al 1991;Forzza 2005).…”

Section: Discussionmentioning

confidence: 81%

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

2017

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Th is paper presents a morphological analysis of the fl ower and fl oral trichomes of three rare species of Dyckia: Dyckia ibicuiensis, D. polyclada and D. racinae. Flowers at anthesis were collected from natural populations and subjected to morphometric and microscopic analysis. Among the most representative features for Dyckia are: morphometrics of individual fl oral parts; the general confi guration of the androecium and gynoecium; the degree of fusion of the stigmatic lobes; the morphology of the ovules, especially in relation to the chalazal appendix; and the presence and constitution of peltate trichomes in the perianth, which exhibited a polymorphism not previously reported for Dyckia. Th e characters were eff ective at describing each species, proposing phylogenetic inferences and recognizing infrageneric groupings. We propose two species groups, which are consistent with previous hypotheses about the relationships among the species of the genus. Th e objective of this study was to provide fl oral morphological data useful for characterizing these three rare species, delimiting the genus and forming phylogenetic hypotheses.

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Section: Discussionmentioning

confidence: 81%

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

2017

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“…Pitcairnioideae) comprises about 164 species (Gouda et al 2012) spread across the southern and southeastern regions of South America (Benzing 2000). In Rio Grande do Sul (southern Brazil), this genus is considered to have the highest diversity, with 29 species (Strehl 2008;Büneker et al 2013) and several endemic species (Hmeljevski et al 2007;Büneker et al 2015;Gomes-da-Silva et al 2017), among which is D. vicentensis Strehl.…”

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confidence: 99%

Propagation of Dyckia vicentensis, an endemic bromeliad of the Pampa biome, Brazil

et al. 2018

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Dyckia vicentensis is an endemic species of the southwestern region of Rio Grande do Sul (RS, Brazil), which presents high ornamental and economic value. Thus, the aim of this study was to test in vitro and ex vitro conditions for its propagation. For in vitro germination, disinfested seeds were inoculated on Murashige and Skoog medium with different salt concentrations and containing or not active charcoal. The ex vitro emergence of the seeds was evaluated using different compositions of substrates. Results showed that the propagation of D. vicentensis could be successfully performed in vitro on medium with 50% salt concentration or ex vitro using commercial substrate. The seedlings showed good adaptation during acclimatization in a greenhouse, although the in vitro germinated plants presented higher survival rate, number of leaves, and biomass in relation to those grown in ex vitro substrate. This is the first study carried out on the propagation of D. vicentensis, which may be used to subsidize its propagation and conservation.

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Dyckia pontesii (Bromeliaceae, Pitcairnioideae), uma nova espécie do Rio Grande do Sul, Brasil

Cited by 2 publications

References 8 publications

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

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

Propagation of Dyckia vicentensis, an endemic bromeliad of the Pampa biome, Brazil

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