Navegando por Autor "SANTOS, Ana Carla Feio dos"

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Acesso aberto (Open Access)
Estruturas secretoras da lâmina foliar de amapá amargo (Parahancornia fasciculata, Apocynaceae): histoquímica e doseamento de flavonoides
(Instituto Nacional de Pesquisas da Amazônia, 2013-12) SANTOS, Ana Carla Feio dos; DIAS, Ana Cristina Andrade de Aguiar; AMARANTE, Cristine Bastos do; FERREIRA, Márlia Regina Coelho
Bitter amapa (Parahancornia fasciculata (Poir.) Benoist) produces a latex, which is presumed to have medicinal properties, as it is used in the treatment of malaria, lung problems, gastritis, and as healing agent. This study aimed to analyze structural and histochemically the sites of production and/or accumulation of biologically active compounds, as well as to determine the kind of flavonoids present in the leaf blade of bitter amapa. For structural and histochemical analysis we used standard protocols in plant anatomy. Whereas to assay flavonoids we used absorption spectrometry in the ultraviolet-visible region. The secretory system of bitter amapa leaves is constituted of both secretory idioblasts and branched laticifers. Histochemical tests revealed different types of chemical substances in the cell protoplast of idioblasts and laticifers. Pharmacological properties of bitter amapa latex can be attributed to two chemical compounds (flavonoids and alkaloids) found in this study, both of them are present in idioblasts and laticifers.
Acesso aberto (Open Access)
Estruturas secretoras em cipó-d'alho (Mansoa standleyi (Steyerm.) A. H. Gentry, Bignoniaceae): ocorrência e morfologia
(Instituto Nacional de Pesquisas da Amazônia, 2012-09) POTIGUARA, Raimunda Conceição de Vilhena; DIAS, Ana Cristina Andrade de Aguiar; KIKUCHI, Tatiani Yuriko Souza; SANTOS, Ana Carla Feio dos; SILVA, Rolf Junior Ferreira
Species of Mansoa are called "cipó-d'alho" because of the smell of garlic that wafts from their vegetative and reproductive parts. Since data on the morphology and occurrence of their secretory structures are scarce and even absent for M. standleyi, the present work characterizes the distribution and morphology of such structures in the vegetative aerial axis of the latter. To do so, samples of the leaf blade and of nodal regions were fixed and examined using histological and scanning electron microscope techniques. Histochemical tests with appropriate controls were carried out on the secretory structures during the secretory phase. Fly and ant individuals that visit the species were sampled, preserved and identified by an entomologist. The secretory structures of the vegetative aerial axis of M. standleyi are peltate and patelliform glandular trichomes. All develop asynchronously and are present in the nodal regions and leaf blade, mainly in their youngest parts. Trichomes form a secretory complex in the nodal regions while they are scattered in the leaf blade. Histochemical analyses revealed that the cupulate and patelliform trichomes are extrafloral nectaries and that the peltate ones present an alkaloid fraction. The visitors of the nodal glands are ants Crematogaster (Formicidae) and Ectatomma brunea (Vespoidea, Formicidae) and flies Oxysarcodexia (Sarcophagidae, subfamily Utitidae [Ulidiidae]). The secretory structures of the vegetative aerial axis of Mansoa standleyi are similar to those reported for Bignoniaceae. An extrafloral nectary is described for M. standleyi for the first time.
Acesso aberto (Open Access)
Structure and distribution of glandular trichomes in three species of Bignoniaceae
(Instituto Nacional de Pesquisas da Amazônia, 2015-12) CASTRO, Fabíola Fernandes Paiva de Castro; GAMA, Thália do Socorro Serra; SANTOS, Ana Carla Feio dos; DEMARCO, Diego; DIAS, Ana Cristina Andrade de Aguiar
Glandular trichomes play a major role in the morphological characterization of the Bignoniaceae. Due to their great diversity of forms and functions, this study aimed to inventory the glandular trichomes present in the aerial vegetative axis of Amphilophium magnoliifolium, Martinella obovata and Stizophyllum riparium, analyze their structure and register the participation of ants in these plants. Fresh samples from the nodal region, petiole and from medium to apical regions of the leaflet blade were fixed and processed according to usual methods in light and scanning electron microscopies. The glandular trichomes found were: peltate, capitate, stipitate, and patelliform/cupular. Peltate trichomes are the most abundant ones and present the most uniform distribution. Patelliform/cupular trichomes occur at specific regions, such as prophylls, leaflet blade and nodal regions. Martinella obovata is the only species that presents capitate and stipitate trichomes, which are widely distributed along the entire aerial vegetative axis. Ants were found in all species, mainly at nodal regions. The occurrence of the capitate-type trichome is reported for the first time to the genus.