Viguiera Kunth (Asteraceae, Heliantheae) na América do Sul e sistemática das espécies do Brasil.

Magenta, Mara Angelina Galvão

doi:10.11606/t.41.2006.tde-12032008-162008

Cited by 22 publications

(43 citation statements)

References 37 publications

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“…No entanto, as análises filogenéticas baseadas em dados morfológicos de Aldama da América do Sul (sob Viguiera s.l. ), feitas por Magenta (2006), indicam uma estreita relação entre as plantas andinas e as mexicanas pertencentes ao subgênero Amphilepis S.F. Blake, das seções Leighia e Hypargyrea e algumas da série Grammatoglossae de Viguiera (senso Blake 1918).…”

Section: Resultsunclassified

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Fitogeografia de Aldama (Asteraceae, Heliantheae) na América do Sul

2017

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ResumoApresentamos um estudo fitogeográfico sobre Aldama (Asteraceae: Heliantheae) baseado em extenso trabalho de campo, dados da literatura e de herbários. AbstractA phytogeographical study of Aldama (Asteraceae: Heliantheae) based on extensive field work, literature and herbaria data is presented here. Species were included in ecoregions (Andean and Neotropical) and phytogeographic dominions previously established for Poaceae (Tropical and Subtropical, Warm Temperate and Cold Temperate grasslands). The majority of species belong to the Neotropical Region, and there are also many in Tropical and Subtropical grasslands. Only A. revoluta reaches the Patagonian sub-region of the Andean Region. Western and northern limits of some species are in the Andes Mountains. In contrast, Yungas and Puna regions may be corridors, linking these areas with the east-central area of the genus. In Brazil, the most favorable conditions for diversity and population density of Aldama species occur in areas with megathermal climates (most of the exclusively Brazilian species) or mesothermal climates (seven species), the latter of Köppen types Aw and Cwa, which are related to Cerrado landscapes. The greatest expressivity of Aldama in these open habitats seems to be linked to the thick underground system, which provides water needs during the dry season and fire protection. Four patterns are presented: Exclusive to the South American Transition Zone (10 spp.), Neotropical-transitional (eight spp.), Andean transitional (three spp.) and Neotropical nontransitional (41 spp).

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Section: Resultsunclassified

“…A relação completa de material examinado coletado no Brasil pode ser encontrada em Magenta (2006); a listagem dos demais materiais pode ser solicitada à primeira autora.…”

Section: Methodsunclassified

Fitogeografia de Aldama (Asteraceae, Heliantheae) na América do Sul

2017

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“…For each individual, one fully expanded leaf corresponding to the medium size for the species according to Magenta (2006) was selected and, from this leaf, samples of the internervural and midrib regions were obtained. Aerial stems were sampled from three different individuals for each population, and the internode nearest to the soil level, and therefore, the oldest portion of aerial stem, for each individual was examined.…”

Section: Methodsmentioning

confidence: 99%

Can climate and soil conditions change the morpho-anatomy among individuals from different localities? A case study in Aldama grandiflora (Asteraceae)

et al. 2018

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Vegetative aerial organs are considerably more exposed to environmental conditions and can reflect the specific adaptations of plants to their local environment. Aldama grandiflora species are known to be widely distributed in Brazil; therefore, individuals from different populations of this species are thought to be exposed to different abiotic and biotic conditions. Several anatomical studies conducted on Brazilian Aldama species have mainly focused on the qualitative anatomical characters or traits of these species, but not on their quantitative traits. In this study, we evaluated whether climate and soil conditions can change the morphometry among individuals of A. grandiflora collected from six sites in the Goiás State, Brazil, by assessing their anatomical characters. Further, soil sampling was performed, and climate data were collected from all the six sites. The analysis indicated few statistical differences among the populations evaluated, showing that A. grandiflora presented consistent leaf and stem anatomical characteristics. The small morpho-anatomical differences found among individuals of the different populations evaluated, reflected the soil conditions in which these populations were grown. Therefore, environmental factors have a significant influence on the morpho-anatomy of Aldama grandiflora.Keywords: cerrado, Compositae, morphometry, phenotypic plasticity, leaf anatomy. Condições climáticas e de solo podem alterar a morfo-anatomia entre indivíduos de diferentes localidades? Um estudo de caso emAldama grandiflora (Asteraceae) ResumoOs órgãos vegetativos aéreos estão consideravelmente mais expostos às condições ambientais e podem refletir as adaptações específicas das plantas ao seu habitat. A espécie Aldama grandiflora é amplamente distribuída no Brasil e, dessa forma, indivíduos de diferentes populações podem estar expostos a diferentes condições ambientais. Vários estudos anatômicos realizados com espécies brasileiras do gênero Aldama têm abordado, principalmente, as características anatômicas qualitativas dessas espécies, mas não em suas características quantitativas. Neste estudo avaliamos se as condições climáticas e do solo podem alterar a morfometria entre os indivíduos de A. grandiflora coletados em seis populações do Estado de Goiás. Foram avaliados os caracteres anatômicos foliares e caulinares, além da amostragem do solo e coleta de dados climáticos, para os seis locais. A análise indicou algumas diferenças estatísticas entre as populações avaliadas, mostrando que A. grandiflora apresentou características anatômicas foliares e caulinares bastante consistentes.As pequenas diferenças morfo-anatômicas encontradas entre indivíduos das diferentes populações avaliadas, refletiram as condições do solo nos quais essas populações se desenvolveram. Assim sendo, fatores ambientais relacionados ao clima e condições do solo têm uma influência significativa sobre a morfo-anatomia de Aldama grandiflora.

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“…Segundo Magenta & Pirani (2014) A. bracteata diferencia-se das outras espécies brasileiras de Aldama por suas folhas verde-claras e pelas brácteas involucrais de distintos tamanhos em 4-5(-6) séries. Segundo Magenta (2006) a espécie exibe grande variedade na forma da folha podendo ser lineares ou lanceoladas. Esta espécie pode ser confundida com as do gênero Aspilia, no entanto A. bracteata possui folhas alternas e flores do raio 8-10-nervadas enquanto o gênero Aspilia no PEB possui folhas opostas e flores radiais com 2-3-nervadas.…”

Section: Methodsunclassified

Heliantheae s.l. (Asteraceae) do Parque Estadual do Biribiri, Diamantina, Estado de Minas Gerais, Brasil

Marques

Nakajima

2015

Hoehnea

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-(Heliantheae s.l. (Asteraceae) from Parque Estadual do Biribiri, Diamantina, Minas Gerais State, Brazil). Heliantheae s.l., the third largest tribe in the Asteraceae family, has 48 genera and 379 species in Brazil, with 199 species restricted to this country. The tribe is very representative of Espinhaço Range flora, which presents a great diversity and endemism. This work presents the taxonomic treatment of Heliantheae s.l. of Parque Estadual do Biribiri (PEB), located in the Espinhaço Range, Diamantina municipality, Minas Gerais State. It provides an identification key, morphological description, geographic distribution, and taxonomic commentaries for each species. The tribe Heliantheae s.l. in PEB has nine genera and 16 species: Acanthospermum, Aldama, Cosmos, Dimerostemma, Galinsoga, and Melampodium (one species each); Aspilia and Bidens (three spp. each), and Calea (four spp.). The PEB has a great number of species Heliantheae s.l. compared with other areas of Minas Gerais State, and it has 12.5% of its species restricted to Minas Gerais State, revealing the importance of this park to protect the flora of Espinhaço Range.

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Viguiera Kunth (Asteraceae, Heliantheae) na América do Sul e sistemática das espécies do Brasil.

Cited by 22 publications

References 37 publications

Fitogeografia de Aldama (Asteraceae, Heliantheae) na América do Sul

Fitogeografia de Aldama (Asteraceae, Heliantheae) na América do Sul

Can climate and soil conditions change the morpho-anatomy among individuals from different localities? A case study in Aldama grandiflora (Asteraceae)

Heliantheae s.l. (Asteraceae) do Parque Estadual do Biribiri, Diamantina, Estado de Minas Gerais, Brasil

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