Seed germination of Chresta sphaerocephala DC. and Lessingianthus bardanoides (Less.) H. Rob. (asteraceae) from Cerrado

Cury, Graziela; Novembre, Ana Dionisia da Luz Coelho; Glória, Beatriz Appezzato da

doi:10.1590/s1516-89132010000600006

Cited by 13 publications

(23 citation statements)

References 27 publications

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“…Thereafter, the nongerminated seeds were analyzed to verify the presence or absence of the embryo and its viability. For such analysis, a cross-sectional cut was done along the fruit just below the pappus insertion, and if the seed contained an embryo, it was removed and evaluated for viability through the tetrazolium test using the method reported by Cury et al (2010) and the results expressed as the percentage of viable embryos.…”

Section: Evaluation Of Ungerminated Seedsmentioning

confidence: 99%

“…This ability may have useful consequences, because at least some seeds will germinate, whatever the environmental conditions they are submitted (Silva et al, 2002). Moreover, seed germination studies on Asteraceae species (Ferreira et al, 2001;Gomes and Fernandez, 2002;Velten and Garcia, 2005;Garcia et al, 2006;Cury et al, 2010) indicate that different species germinate differently and respond to distincts alternating temperatures with variations in germination rates. The constant or alternating temperatures between 20 and 30 °C were most efficient despite the variation in optimal temperature for seed germination for the species studied.…”

Section: Seed Germinationmentioning

confidence: 99%

“…The thickened underground systems, which can bear buds, were observed in other Asteraceae species, and these systems may be morphologically diverse, such as xylopodia, rhizophores, root buds and diffuse underground systems (Vilhalva and Appezzato-da-Glória, 2006;Hayashi and Appezzato-da-Glória, 2007;Appezzato-da-Glória et al, 2008;Appezzato-da-Glória and Cury, 2011). However, it has been observed that some species cannot propagate vegetatively even bearing a thickened underground system, and the sexual reproduction ensures maintenance of the species (Cury et al, 2010). The underground system for Brazilian species from the Aldama genus is characterized by a http://dx.doi.org/10.1590/2317-1545v37n3146138 xylopodium emitting tuberous roots (Oliveira et al, 2013;Bombo et al, 2014); therefore, these species do not use vegetative propagation as a form of reproduction.…”

Section: Introductionmentioning

confidence: 99%

“…Few studies have investigated seed germination for Brazilian Asteraceae species (Ferreira et al, 2001;Gomes and Fernandez, 2002;Velten and Garcia, 2005;Garcia et al, 2006;Cury et al, 2010), and about the propagation strategies of Brazilian Aldama species. Germination behavior has only been reported for Aldama robusta (Gardner) E.E.Schill.…”

Section: Introductionmentioning

confidence: 99%

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Seed germination of Brazilian Aldama species (Asteraceae)

Bombo¹,

Oliveira²,

Appezzato‐da‐Glória³

et al. 2015

J. Seed Sci.

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-Brazilian samples from the Aldama genus (Asteraceae) could not propagate vegetatively despite their thickened underground system; thus, this study on sexual propagation is critical given the lack of data on reproductive strategies for such species. The aim for this research was to assess the optimal temperature for Aldama arenaria, A. filifolia, A. linearifolia, A. robusta and A. trichophylla seed germination. Seed germination was evaluated at the constant temperatures 20, 25 and 30 °C and the alternating temperatures 15-35, 20-30 and 20-35 °C with an 8-h daily photoperiod, using fluorescent-lamp. The ungerminated seeds were evaluated for embryo viability. The A. filifolia seed health was also evaluated. The optimal temperatures for germination are 20 and 25 °C for Aldama arenaria, A. filifolia, A. robusta and A. trichophylla seeds and 20 °C for A. linearifolia seeds. The alternating temperature 15-35 °C is not recommended for germinating seeds from these species. The six fungi taxa studied herein did not affect A. filifolia seed germination.Index terms: Compositae, sexual propagation, Viguiera, cerrado.Germinação de sementes de espécies brasileiras de Aldama (Asteraceae) RESUMO -Amostras de espécies brasileiras do gênero Aldama (Asteraceae) não têm capacidade de se propagar vegetativamente, apesar do seu sistema subterrâneo espessado; assim, esse estudo da propagação sexuada é importante, devido à falta de informações sobre as estratégias de reprodução dessas espécies. O objetivo da pesquisa foi determinar a faixa ideal de temperatura para a germinação das sementes de Aldama arenaria, A. filifolia, A. linearifolia, Aldama robusta e A. trichophylla. A germinação das sementes foi avaliada em temperaturas constantes de 20, 25 e 30 °C e alternadas de 15-35, 20-30 e 20-35 °C sob fotoperíodo diário de 8 h, sob lâmpada fluorescente. As sementes não germinadas foram avaliadas quanto à viabilidade do embrião. A sanidade das sementes de A. filifolia também foi avaliada. As temperaturas ideais para a germinação das sementes de Aldama arenaria, A. filifolia, A. robusta e A. trichophylla são 20 e 25 ºC e, para as de A. linearifolia é 20 °C. A temperatura alternada de 15-35 °C não é recomendada para a germinação das sementes dessas espécies. Os seis táxons de fungos que foram determinados não influenciam na germinação das sementes de A. filifolia.Termos para indexação: Compositae, propagação sexuada, Viguiera, cerrado.

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Section: Evaluation Of Ungerminated Seedsmentioning

confidence: 99%

Section: Seed Germinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seed germination of Brazilian Aldama species (Asteraceae)

Bombo¹,

Oliveira²,

Appezzato‐da‐Glória³

et al. 2015

J. Seed Sci.

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“…The seeds that did not germinate had their viability tested by performing a modified tetrazolium test according to the methodology adopted by Cury et al (2010). Seeds were also considered not viable when the tissue was damaged and/or altered by fungi, compromising the seedling development.…”

Section: Germination Experimentsmentioning

confidence: 99%

Germination and seedling morphology of four South American <i>Smilax</i> (Smilacaceae).

Martins

Soares

Bombo

et al. 2012

RBT

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Species of Smilax, also known as greenbrier, are widely distributed in Brazil and their commercial trades are carried out by the extractivism of native species. We the aim to provide information about the germination and development of seedlings in four Smilax species, different experiments were developed under controlled conditions. We evaluated two germination treatments: temperature (30ºC and 20-30ºC) and light (presence/ absence), and for few cases the tetrazolium treatment was applied. A different treatment response was observed among the studied species. Light had a significant influence in S. brasiliensis, with the highest germination rates at 20-30ºC in dark conditions. S. campestris showed significant differences among temperature treatments, but not to light; while S. cissoides showed high germination rates (66-78%), independently of treatment. However, S. polyantha had low germination rates (19-24%). After one year, the expanded leaves showed different characteristics among the studied species. Leaves of S. brasiliensis were ovate, coriaceous, three main veins and prickle-like structures only on the midrib on abaxial face. S. campestris leaves were oblong, coriaceous and prickle-like structures were located at the leaf midrib and margin. S. cissoides had ovate-elliptic, membranaceous leaves, with three main veins with prickle-like structures on the abaxial face. S. polyantha leaves showed ovateelliptic, coriaceous leaves, with three main veins, translucent secondary veins and no prickle-like structures. A seedling identification key was elaborated based on morphological characteristics. Rev. Biol. Trop. 60 (1): 495-504. Epub 2012 March 01.

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