Morfo-anatomia do sistema subterrâneo de Calea verticillata (Klatt) Pruski e Isostigma megapotamicum (Spreng.) Sherff - Asteraceae

Vilhalva, Divina Aparecida Anunciação; Appezzato‐da‐Glória, Beatriz

doi:10.1590/s0100-84042006000100005

Cited by 14 publications

(13 citation statements)

References 11 publications

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“…Its structure, ontogenesis and ecological function do not found correspondence with previously subterranean structures described in the international literature, but this term is already accepted by Botanists from other countries who had the opportunity to study Brazilian vegetation, and some Brazilian authors have already employed the term in other studies (Alonso and Machado 2007, Appezzatoda-Glória et al 2008a, Cury and Appezzato-da-Glória 2009. The variation of the xylopodium size and shape verified in the present study was already mentioned by Appezzato-da-Glória et al (2008a) P. alopecuroides and V. elegans, was also reported by Vilhalva and Appezzato-da-Glória (2006) and Appezzato-da-Glória et al (2008a). Plants with the presence of xylopodia showed seasonal growth and, besides the loss of aboveground biomass during the dry season or destruction caused by e.g.…”

Section: Discussionsupporting

confidence: 78%

“…The stemlike origin of xylopodium, as described in M. cordifolia, M. sessilifolia, V. elegans and V. mepapotamica, has already been observed for some other species, such as Isostigma megapotamicum (Spreng.) Sherff (Asteraceae) (Vilhalva and Appezzato-da-Glória 2006); radicular origin, as described in Pterocaulon alopecuroides, was observed for Clitoria guyanensis (Aubl.) Benth (Leguminosae) (Rizzini and Heringer 1961).…”

Section: Discussionmentioning

confidence: 95%

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Morpho-anatomical features of underground systems in six Asteraceae species from the Brazilian Cerrado

Appezzato‐da‐Glória

Cury

2011

An. Acad. Bras. Ciênc.

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In the Brazilian Cerrado (neotropical savanna), the development of bud-bearing underground systems as adaptive structures to fire and dry periods can comprise an important source of buds for this ecosystem, as already demonstrated in the Brazilian Campos grasslands and North American prairies. Asteraceae species from both woody and herbaceous strata have subterranean organs that accumulate carbohydrates, reinforcing the adaptive strategy of these plants to different environmental conditions. This study aims to analyse the morpho-anatomy of underground systems of six species of Asteraceae (Mikania cordifolia L.f. Willd., Mikania sessilifolia DC, Trixis nobilis (Vell.) Katinas, Pterocaulon alopecuroides (Lam.) DC., Vernonia elegans Gardner and Vernonia megapotamica Spreng.), to describe these structures and to verify the occurrence and origin of shoot buds, and to analyse the presence of reserve substances. Individuals sampled in Cerrado areas in São Paulo State showed thick underground bud-bearing organs, with adventitious or lateral roots and presence of fructans. Xylopodium was found in all studied species, except for Trixis nobilis, which had stem tuber. The presence of fructans as reserve, and the capacity of structures in the formation of buds indicate the potential of herbaceous species of Asteraceae in forming a viable bud bank for vegetation regeneration in the Brazilian Cerrado.

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Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 95%

Morpho-anatomical features of underground systems in six Asteraceae species from the Brazilian Cerrado

Appezzato‐da‐Glória

Cury

2011

An. Acad. Bras. Ciênc.

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“…Morpho-anatomical studies of the underground systems of plants from the Cerrado have shown the presence of gemmiferous underground systems, such as xylopodia and root buds (Hayashi & Appezzatoda-Gloria 2005, Vilhalva & Appezzato-da-Gloria 2006. Alonso & Machado (2007) described the morpho-anatomy and sprouting ability of the underground system of Erythroxylum species in the Cerrado.…”

Section: Resultsmentioning

confidence: 99%

The role of root buds in the regeneration of Casearia sylvestris Swartz (Salicaceae) in the cerrado, São Carlos, São Paulo state, Brazil

Imatomi

Souza

Gualtieri

et al. 2014

Hoehnea

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-(The role of root buds in the regeneration of Casearia sylvestris Swartz (Salicaceae) in the Cerrado, São Carlos, São Paulo State, Brazil). The present work describes the fire effects on the population structure of Casearia sylvestris Swartz (Salicaceae). Diameter and height structure as well as spatial distribution patterns of the root sprouts were analyzed pre-and post-fire. The morphology and anatomy of the underground system were also analyzed in order to investigate the nature and origin of sprouts from this system. In this study, a 10-ha of Cerrado area was sampled from February to November 2006; in August, a fire burned roughly 80% of the study area, allowing us to compare the data collected pre-and post-fire. Our findings show that the underground systems consisted of specialized roots and buds originated close to the vascular cambium. The spatial distribution of the root sprouts became clustered pre-and post-fire and most of the root sprouts were concentrated in the first size class, indicating that the sprouts from roots play an important role in the recovery of this species in burnt areas. Keywords: Cerrado, natural fires, sprouting, vegetative reproduction RESUMO -(A função de raízes gemíferas na regeneração de Casearia sylvestris Swartz (Salicaceae) no Cerrado, São Carlos, SP, Brasil). Este artigo descreve os efeitos de incêndio na estrutura populacional de Casearia sylvestris Swartz (Salicaceae). Foram analisados a estrutura de diâmetro e altura e o padrão de distribuição espacial antes e após o fogo. Além disso, foi realizada a caracterização morfológica e anatômica do sistema subterrâneo para determinar a natureza e origem dos brotos oriundos desse sistema. Neste estudo foram amostrados 10 ha de fevereiro a novembro de 2006, em agosto, um incêndio queimou cerca de 80% da área de estudo, permitindo a comparação de dados coletados antes e após este evento. Foram verificados que os sistemas subterrâneos gemíferos são de natureza radicular e que os brotos se originam próximo ao câmbio vascular. A distribuição espacial dos brotos de raiz tornou-se agregada após o incêndio e houve maior concentração de brotos de raiz na primeira classe de tamanho indicando que esses brotos são responsáveis pela recomposição dessa espécie em áreas queimadas. Palavras-chave: brotamento, Cerrado, incêndios naturais, reprodução vegetativa

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“…Brazilian species from this genus occur mainly in the Cerrado regions in climates that have dry winters (Magenta et al, 2010), and these species are most often observed under such conditions that may be related to the type of thickened underground system, which supports the plants' water needs during dormancy (Zaidan and Carreira, 2008;Magenta et al, 2010) and is essential for regenerating the vegetative aerial portions (Oliveira et al, 2013;Bombo et al, 2014). 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).…”

Section: Introductionmentioning

confidence: 99%

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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Morfo-anatomia do sistema subterrâneo de Calea verticillata (Klatt) Pruski e Isostigma megapotamicum (Spreng.) Sherff - Asteraceae

Cited by 14 publications

References 11 publications

Morpho-anatomical features of underground systems in six Asteraceae species from the Brazilian Cerrado

Morpho-anatomical features of underground systems in six Asteraceae species from the Brazilian Cerrado

The role of root buds in the regeneration of Casearia sylvestris Swartz (Salicaceae) in the cerrado, São Carlos, São Paulo state, Brazil

Seed germination of Brazilian Aldama species (Asteraceae)

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