Novos táxons e combinações em Viguiera (Asteraceae - Heliantheae)

Magenta, Mara Angelina Galvão; Pirani, José Rubens; Mondin, Cláudio Augusto

doi:10.1590/2175-7860201061101

Cited by 14 publications

(11 citation statements)

References 3 publications

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“…exhibited variation from lower to higher elevation. The studied species, A. grandiflora, occurs exclusively in open areas of Cerrado (Magenta et al, 2010); it is subjected to typical Cerrado environmental conditions such as high solar radiation, low availability of nutrients in the soil like calcium and magnesium, and high aluminum levels, in addition to low water availability, mainly in the upper soil layers (Ratter et al, 1977). These conditions might influence the anatomy of plant species.…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

“…Among its representatives is Aldama La Llave, a South American genus, which includes 35 Brazilian species, of which 17 are endemic (Magenta et al, 2010). The representatives of this genus are morphologically very similar, leading to problems in taxonomical delimitations among the species (Schilling and Panero, 2011).…”

Section: Introductionmentioning

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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“…Análises cladísticas e, principalmente, a elaboração de filogenias baseadas em dados moleculares, levaram ao desmembramento de Viguiera (Yates 1979;Schilling & Jansen 1989;Schilling & Panero 1996a, 1996b, 2002Magenta & et al 2010) em gêneros menores. Com base nas observações de Robinson (1977), que notou a existência de tricomas nos filetes de Viguiera dentata (Cav.)…”

Section: Introductionunclassified

“…Embora compartilhe com o segundo a presença de capítulos com flores liguliformes amarelas e neutras e flores do disco perfeitas, férteis, com corola tubulosa claramente dividida em tubo e limbo, Aldama possui páleas do receptáculo das flores periféricas do disco transversalmente corrugadas, com base acentuadamente gibosa e ápice pungente e as cipselas das flores da periferia do disco são conspicuamente assimétricas, com pápus facilmente destacável. As plantas da América do Sul possuem receptáculo com páleas naviculares com ápice agudo, ou às vezes obtuso ou truncado, que envolvem apenas parcialmente a flor, as cipselas são simétricas com pápus persistente na grande maioria das espécies, incluindo todas as do Brasil (Magenta et al 2010).…”

Section: Introductionunclassified

Novidades taxonômicas em Aldama (Asteraceae-Heliantheae)

Magenta

Pirani

2014

Rodriguésia

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ResumoEstudos recentes de dados moleculares evidenciaram que as espécies sul-americanas tradicionalmente tratadas em Viguiera Kunth deveriam ser transferidas para Aldama La Llave. Seguindo essa nova circunscrição, o estudo taxonômico das 35 espécies de Aldama do Brasil demonstra que são ainda necessárias três novas combinações de nomes de espécies e duas de nomes de variedades, além do reconhecimento de uma nova variedade, 20 sinonimizações e 25 lectotipificações. Palavras-chave: Brasil, Compositae, Helianthinae, Rhysolepis, Viguiera. AbstractRecent studies using molecular data showed that the species traditionally treated as Viguiera Kunth in South America should be transferred to Aldama La Llave. After carrying out a taxonomic study of the 35 Brazilian species of Aldama, we propose three new combinations for binomials and two for varieties, plus a new variety, 20 new synonyms and 25 lectotypifications.

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“…& Panero (=Viguiera arenaria Baker in Martius) and A. robusta (Gardner) E.E.Schill. & Panero (=Viguiera robusta Gardner in Hook) are herbs and subshrubs with a thickened underground stem and seasonal development (Magenta et al 2010). During favorable periods of development, these species emit shoots from the underground system and produce flowers.…”

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confidence: 99%

Seasonal variation of the essential oil from two Brazilian native Aldama La Llave (Asteraceae) species

Oliveira

Bombo

Oliveira

et al. 2016

An. Acad. Bras. Ciênc.

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Aldama arenaria and A. robusta are morphologically similar aromatic species that have seasonal development. The yield and chemical composition of essential oils from aerial and underground vegetative organs of these species were compared to verify the production of volatile metabolites in flowering and dormant phases of development and to identify if there are unique compounds for either species. The major compound in the essential oils from A. arenaria leaves was palustrol (16.22%) and for aerial stems was limonene (15.3%), whereas limonene (11.16%) and α-pinene (19.64%) were the major compounds for leaves and aerial stems from A. robusta, respectively. The major compound for the underground organs was α-pinene, in both species and phenological stages. High amounts of diterpenes were found especially for A. arenaria essential oils. Each analyzed species presented unique compounds, which can provide a characteristic chemical profile for both species helping to solve their taxonomic problems. This study characterized for the first time the yield and essential oil composition of A. arenaria and A. robusta, which have medicinal potential, and some of the compounds in their essential oils are unique to each one and may be useful in helping the correct identification of them.

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Novos táxons e combinações em Viguiera (Asteraceae - Heliantheae)

Cited by 14 publications

References 3 publications

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

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

Novidades taxonômicas em Aldama (Asteraceae-Heliantheae)

Seasonal variation of the essential oil from two Brazilian native Aldama La Llave (Asteraceae) species

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