Embryology of Ageratum conyzoides L. and A. fastigiatum R.M. King &amp; H. Rob. (Asteraceae)

Franca, Rafael de Oliveira; De-Paula, Orlando Cavalari; Carmo-Oliveira, Renata; Marzinek, Juliana

doi:10.1590/0102-33062014abb3609

Cited by 19 publications

(13 citation statements)

References 32 publications

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“…In the present literature search, only one article was found that presents embryological aspects of A. fastigiatum. Franca et al (2015) collected flower buds, flowers, and fruits in various stages of development of Ageratum fastigiatum and the obtained slides reinforced the heterogeneity of the familiar embryology and showed, for the first time, the anther wall development of the monocotyledonous type for Asteraceae. (FRANCA et al, 2015).…”

Section: Morphological Descriptionsupporting

confidence: 52%

Biological Acitivity, Chemical Composition and Botanical Aspects of Ageratum fastigiatum (Gardner.) R. M. King et H. Rob.

et al. 2022

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Ageratum fastigiatum is a plant of the genus Asteraceae, a family that includes about thirty tropical plants. Studies about A. fastigiatum have increased mainly due to its pharmacological and ethnobotanical relevance, as well as studies that have demonstrated the anti-inflammatory effects of different extracts of such plant and their use in pest control and insecticide production. Such aspects are relevant due to the constant demand for new drugs and the need to corroborate its traditional use, however, the literature still lacks studies that gather the main findings about a plant with so much potential. Thus, this review aimed to present the botanical, ethnobotanical, phytochemical and pharmacological aspects of the plant in order to provide an overview about the plant’s state-of-the-art and to contribute to future studies regarding Ageratum fastigiatum. Through this literature review, it was demonstrated that the botanical and identification aspects of A. fastigiatum are well defined and registered among researchers and that A. fastigiatum is a plant whose biological action has demonstrated great potential for both commercial and public health applications , which makes it extremely attractive. However, the number of studies was relatively small, which proves to be a plant still very little explored. Keywords: Brazilian Cerrado. Ethnopharmacology. Herbal Medicine. Medicinal Plants. Resumo Ageratum fastigiatum é uma planta do gênero Asteraceae, família que reúne cerca de trinta plantas tropicais. Os estudos a respeito da A. fastigiatum têm aumentado principalmente devido à relevância farmacológica e etnobotânica bem como estudos que demonstraram efeitos anti-inflamatórios de diferentes extratos da planta e o uso destes no controle de pestes e produção de inseticidas. Tais aspectos são relevantes diante da demanda constante de novas drogas e da necessidade de corroborar com o uso tradicional da planta, contudo, a literatura ainda carece de um trabalho onde estejam reunidos os principais achados a respeito de uma planta com tanto potencial. Assim, esta revisão teve como objetivo apresentar os aspectos botânicos, etnobotânicos, fitoquímicos e farmacológicos da planta a fim de proporcionar um panorama sobre o estado da arte sobre a mesma e contribuir para estudos futuros a respeito da Ageratum fastigiatum. Por meio da presente revisão de literatura, foi demonstrado que os aspectos botânicos e de identificação da A. fastigiatum são bem definidos e registrados entre pesquisadores e que a A. fastigiatum é uma planta cuja ação biológica demonstrou grande potencial para aplicações tanto comerciais quanto de saúde pública, o que a torna extremamente atrativa. Contudo, a quantidade de estudos foi relativamente pequena o que demonstra ser uma planta ainda muito pouco explorada. Palavras-chave: Cerrado Brasileiro. Etnofarmacologia. Fitoterapia. Medicina. Plantas Medicinais.

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Section: Morphological Descriptionsupporting

confidence: 52%

Biological Acitivity, Chemical Composition and Botanical Aspects of Ageratum fastigiatum (Gardner.) R. M. King et H. Rob.

et al. 2022

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“…Batista & De Souza (2017) studied the floral ontogeny of ten Compositae species from Brazil and showed the usefulness of the flower characters in distinguishing species. Also, Franca et al, (2015) investigated embryology of two Ageratum L. species and confirmed heterogeneity of embryological processes within family. Embryological data are constant at the genus level and thus could be useful in perceiving taxonomic relation among families, or between genera and taxa (Palser, 1975;Stuessy, 2009).…”

Section: Introductionmentioning

confidence: 75%

Anatomical characteristics of Xeranthemum L. (Compositae) species: taxonomical insights and evolution of life form

Gavrilović¹,

Rančić²,

Škundrić³

et al. 2019

PAK.J.BOT.

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Comparative anatomical and micromorphological analyses of root, stem, peduncle, leaf and inflorescence have been conducted on two Xeranthemum species, X. annuum and X. cylindraceum, by light microscopy (LM) and scanning electron microscopy (SEM). The main goal of the study was to examine the most important anatomical features and to find new valid taxonomic delimiting characters for the first time in both species. Regarding vegetative organs anatomy, the data obtained in this study indicated that both species possessed secondary tissues in the root, although these plants are annual. Also, stem anatomy was a typical of the Compositae family members, and anomocytic stomata type and dorsiventral leaf structure were present. On the involucral bracts surface crystals were noticeable, while highly developed multilayer sclerenchyma was present in the mesophyll. Palea anatomy was very similar to bract anatomy. Some floral features were as follows: lateral anther dehiscence, corolla composed of uniseriate epidermis and with a homogeneous parenchyma in the mesophyll, inferior ovary and anatropous ovule with basal placentation. The specific quantitative characters that were different between the examined species were emphasized. Some selected, well defined qualitative anatomical characters (e.g. shape of the young stem and peduncle cross-sections, type of glandular trichomes and cortical vascular bundles occurrence), on the basis of which the studied species were distinguishable, strengthen the taxonomy of the Xeranthemum genus and provide features for better identification of the taxa. This is the first study of the anatomy of Xeranthemum species and some of the characters found (secondary growth and dorsiventral leaves) points towards an adaptation of mesophilous ancestors to xeric habitats in Xeranthemum.

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“…The Heliantheae phytomelanin deposition pattern occurs in Coreopsideae, Heliantheae, Madieae, Millerieae, Neurolaeneae and Tageteae. In such cases, the pericarp is similar to the pericarp of Eupatorieae (Table 3) with a uniseriate exocarp, an external mesocarp composed of parenchyma, an inner mesocarp composed of sclerenchyma and parenchyma cells, and an endocarp consumed during cypsela development (Misra, 1964(Misra, , 1972Pandey & Singh, 1982, 1994Stuessy & Liu, 1983;Pandey, 1998). However, there is no formation of a schizogenous space, and phytomelanin is deposited in the intercellular spaces between the parenchyma and sclerenchyma mesocarp.…”

Section: Discussionmentioning

confidence: 99%

Fruits ofHeterocoma(Vernonieae-Lychnophorinae): taxonomic significance and a new pattern of phytomelanin deposition in Asteraceae

et al. 2015

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Heterocoma is a Brazilian endemic genus resulting from the dismemberment of Sipolisiinae, in which only representatives with fruit containing phytomelanin were included in the genus. As the fruits of Asteraceae are known to be systematically important at various taxonomic levels and Heterocoma fruit has not been described previously, we studied the morphology and anatomy of the cypselas of all species of the genus, comparing them with other fruits in the family containing phytomelanin and evaluating the systematic potential at the specific and tribal levels. The fruits were analysed by scanning electron microscopy (SEM) and light microscopy. The morphological features of the fruit, including the carpopodium, ribs and pappi, varied in the genus and demonstrated potential for species discrimination. The anatomy showed a pattern for the genus with a uniseriate exocarp, the outer mesocarp composed of fibres arranged in several layers, the inner mesocarp composed of several layers of parenchyma, the endocarp, and phytomelanin deposited between the inner and outer mesocarp. This anatomical pattern of phytomelanin deposition differs from that of other Asteraceae with phytomelanin in their fruit. Heterocoma is also the only genus in Vernonieae that has phytomelanin deposition in the cypselas. © 2015 The Linnean Society of London, Botanical Journal of the Linnean Society, 2015, 179, 255–265.

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Embryology of Ageratum conyzoides L. and A. fastigiatum R.M. King & H. Rob. (Asteraceae)

Cited by 19 publications

References 32 publications

Biological Acitivity, Chemical Composition and Botanical Aspects of Ageratum fastigiatum (Gardner.) R. M. King et H. Rob.

Biological Acitivity, Chemical Composition and Botanical Aspects of Ageratum fastigiatum (Gardner.) R. M. King et H. Rob.

Anatomical characteristics of Xeranthemum L. (Compositae) species: taxonomical insights and evolution of life form

Fruits ofHeterocoma(Vernonieae-Lychnophorinae): taxonomic significance and a new pattern of phytomelanin deposition in Asteraceae

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