Época de maturação, dispersão, colheita e qualidade fisiológica de sementes de sempre-viva (Syngonanthus elegans (Bong.) Ruhland)

Nunes, Ubirajara Russi; Nunes, Silvia Cristina Paslauski; Júnior, Valter Carvalho de Andrade; Júnior, Sebastião Lourenço de Assis; Bispo, Fábio Henrique Alves

doi:10.1590/s1413-70542008000600015

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…The WPM medium contains higher levels of PO 4 3-, SO 4 2-and Mg 2+ but lower NO 3 -and NH 4 + levels in relation to the media used for herbaceous plants ( ANTONIDAKI-GIATROMANOLAKI et al, 2010). According Nunes et al (2008b), S. elegantulus is adapted to low-fertility sandy soils, which explain the better performance in WPM medium due to the lower demand of nutrients for adequate development. The number of leaves formed by S. elegantulus tended to increase with the addition of sucrose to the culture medium: the plantlets presented approximately fifteen leaves when grown in media with 30 g L -1 sucrose (Figure 3).…”

Section: Resultsmentioning

confidence: 99%

Micropropagation of Syngonanthus elegantulus

Pêgo

Paiva

2013

Ciênc. agrotec.

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The species Syngonanthus elegantulus Ruhland is an important native plant used as cut flowers, but extractive exploration has caused the endangered status of this plant. Therefore, the objective of this study was to establish a protocol of the micropropagation of S. elegantulus. To this end, seed germination was tested in media containing different concentrations of WPM salts. For plantlet establishment, MS and WPM media were evaluated with 50 and 100% of the salt concentrations. Different the sucrose levels in the WPM medium were also evaluated. For multiplication, the plantlets were inoculated in WPM media with 0.0, 0.5, 1.0, 2.0 and 4.0 mg L -1 TDZ and 0.0, 0.5 and 1.0 mg L -1 NAA in all possible combinations. The pre-acclimatization effect was tested in the plantlets using the following substrates: sand, Plantmax TM and vermiculite. The concentration of the medium did not influence the percentage of germination, but the germination speed index was inversely proportional to the nutrient addition to the culture medium. The best medium for plantlet establishment was WPM at the original salt concentration plus 17 g L -1 sucrose. The addition of 0.5 and 1.0 mg L -1 NAA is recommended for callus induction. The highest number of shoots was obtained in the presence of 1.0 mg L -1 TDZ or the combination of 1.0 mg L -1 TDZ with 0.5 mg L -1 NAA. S. elegantulus presented higher survival when acclimatized directly in sand. Index terms:In vitro cultivation, floriculture, conservation, endangered, plant. RESUMOA espécie Syngonanthus elegantulus Ruhland é uma importante planta nativa usada como flor de corte, mas sua exploração extrativista tem causado risco de extinção. Assim, neste estudo, objetivou-se estabelecer um protocolo de micropropagação de S. elegantulus. Para isso, a germinação das sementes foi testada em meio WPM, contendo diferentes concentrações de sais. Para o estabelecimento de plântulas, os meios MS e WPM foram avaliados com 50% e 100% de concentração de sais. Termos para indexação: Cultivo in vitro, floricultura, conservação, planta em extinção.

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Section: Resultsmentioning

confidence: 99%

Micropropagation of Syngonanthus elegantulus

Pêgo

Paiva

2013

Ciênc. agrotec.

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Harvest times of Comanthera elegans, a worldwide traded Brazilian species of everlasting flower: implications on seed production, germination, and on species management

et al. 2015

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Comanthera elegans (Bong.) L.R. Parra & Giul (''sempre-viva-pé-de-ouro'') is one of the most economically important species among the Eriocaulaceae in Brazil. Its inflorescences are used to make handicrafts and have long been exported to all over the world. The collection period usually begins in the second half of April and extends to May, occasionally until the first half of June. We assessed seed production and germinability throughout the 2006 harvest season: April-November, as well as the variation in morphology and anatomy of inflorescences along this period. In the evaluated flowering, seeds still had not yet been completely formed by early April, the onset month of commercial collection. Instead, germinable seeds were first observed in May, while seed dispersal was already in progress in early June. Collection in June resulted in plant uprooting, due to the tighter attachment of the scape to the rosette. The beginning and peak of germination occurred earlier for seeds from the most delayed collections, and the highest germinability was presented by seeds collected in September.We showed that the best period for the plant sexual reproduction surpasses the best period for commercial collection. Due to the onset of germinable seeds only as late as at the second half of the harvesting period, encouraging the delayed beginning of inflorescence collection may well represent a management strategy. Furthermore, the reservation of non-harvesting areas, which would secure the maintenance of plant populations in the wild and thus guarantee seed production and dispersal; maintaining remnants of inflorescences in collected areas; and encouraging cultivation should be considered.

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Handicrafts from Jalapão (TO), Brazil, and their relationship to plant anatomy

Eichemberg¹,

Scatena²

2011

The Journal of the Torrey Botanical Society

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Época de maturação, dispersão, colheita e qualidade fisiológica de sementes de sempre-viva (Syngonanthus elegans (Bong.) Ruhland)

Cited by 4 publications

References 12 publications

Micropropagation of Syngonanthus elegantulus

Micropropagation of Syngonanthus elegantulus

Harvest times of Comanthera elegans, a worldwide traded Brazilian species of everlasting flower: implications on seed production, germination, and on species management

Handicrafts from Jalapão (TO), Brazil, and their relationship to plant anatomy

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