Systematics and phylogeny of theCompositae (Asteraceae)

Wagenitz, Gerhard

doi:10.1007/bf00986129

Cited by 142 publications

(84 citation statements)

References 24 publications

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“…In the Jacea pollen type, the spines are reduced are subprolate spheroidal shape. Wagenitz (1955Wagenitz ( , 1976 put forward the idea that reduction of the spines and inner columellae, lengthening of the colpus and thickening of the costae are progressive characteristics in the Asteraceae family. In all taxa studied here, the spines are shorter than 1 μm and the colpus are quite long.…”

Section: Discussionmentioning

confidence: 99%

Pollen morphology of Centaurea L. (Asteraceae) in Iran

et al. 2013

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The genus Centaurea L. is one of the largest genera in the family Asteraceae. The number of taxa included in this genus ranges from 500 to 600 worldwide. Iran is one of the major centers of diversity for this genus. Pollen morphology has proved useful in the systematics of Asteraceae, as well as in that of some of its genera and species. The pollen morphology of 19 taxa of the genus Centaurea was investigated in detail by light and scanning electron microscopy. Examination under light microscopy showed pollen grains to be tricolporate, isopolar, radially symmetrical, oblate spheroidal, prolate spheroidal, subprolate, tectum perforate and scabrate. Based on the exine ornamentation observed under scanning electron microscopy, we identified two types of pollen grains, designated type I (dense acute spinules) and type II (sparse spinules). All of the taxa evaluated resemble Wagenitz's Jacea type. We present micrographs of pollen grains, together with descriptions of the characteristics of their structure. We found that the pollen characters (shape, exine structure, sculpturing) were useful for classification.

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Section: Discussionmentioning

confidence: 99%

Pollen morphology of Centaurea L. (Asteraceae) in Iran

et al. 2013

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“…This was a conservative approach that was generally accepted for a very long time. However, discussion on the status of Echinopinae restarted when Wagenitz (1976) proposed the segregation of the subtribe as a separate tribe, Echinopeae. Dittrich (1977) returned to Cassini's early views and proposed the restoration of Echinopeae and Carlineae.…”

Section: The Tribe Cardueaementioning

confidence: 99%

THE CARDUEAE (COMPOSITAE) REVISITED: INSIGHTS FROM ITS,trnL-trnF, ANDmatK NUCLEAR AND CHLOROPLAST DNA ANALYSIS^1,²

Susanna¹,

Garcia‐Jacas²,

Hidalgo³

et al. 2006

Annals of the Missouri Botanical Garden

124

128

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“…Leaves characters such as the type and position of secretory structures have been useful for species differentiation (Castro et al, 1997;Fahn, 2000;Oliveira et al, 2013), including in Asteraceae (Solereder, 1908;Metcalfe and Chalk, 1950;Wagenitz, 1976;Castro et al, 1997;Adedeji and Jewoola, 2008;Fritz and Saukel, 2011). However, some studies (Kakrani et al, 1991;Sheue et al, 2003;Filartiga et al, 2016) showed that the number and position of secretory ducts can vary, rendering it difficult to use this character as the only parameter of differentiation among species.…”

Section: Discussionmentioning

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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Systematics and phylogeny of theCompositae (Asteraceae)

Cited by 142 publications

References 24 publications

Pollen morphology of Centaurea L. (Asteraceae) in Iran

Pollen morphology of Centaurea L. (Asteraceae) in Iran

THE CARDUEAE (COMPOSITAE) REVISITED: INSIGHTS FROM ITS,trnL-trnF, ANDmatK NUCLEAR AND CHLOROPLAST DNA ANALYSIS^1,²

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

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Systematics and phylogeny of theCompositae (Asteraceae)

Cited by 142 publications

References 24 publications

Pollen morphology of Centaurea L. (Asteraceae) in Iran

Pollen morphology of Centaurea L. (Asteraceae) in Iran

THE CARDUEAE (COMPOSITAE) REVISITED: INSIGHTS FROM ITS,trnL-trnF, ANDmatK NUCLEAR AND CHLOROPLAST DNA ANALYSIS1,2

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

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THE CARDUEAE (COMPOSITAE) REVISITED: INSIGHTS FROM ITS,trnL-trnF, ANDmatK NUCLEAR AND CHLOROPLAST DNA ANALYSIS^1,²