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Search Results: 1 - 10 of 264186 matches for " Raimunda Concei??o de Vilhena Potiguara "
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Elaphoglossum (Dryopteridaceae-Fern) of Amazon Rainforest in Brazil: Anatomic Characterization and Adaptative Strategies  [PDF]
Ana Carla Feio, Ana Cristina Andrade de Aguiar-Dias, Raimunda Concei??o de Vilhena Potiguara
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.49229
Abstract:

This study describes the anatomy of sterile leaves of Elaphoglossum discolor (Kuhn) C. Chr., E. flaccidum (Fée) T. Moore and E. laminarioides (Bory ex Fée) T. Moore, the most representative species of the genus in the Ecological Park of Gunma in Pará State. It reports the main diagnostic characters and provides new systematic data for the group. In addition, it locates the production and accumulation sites of bioactive compounds to determine possible adaptive strategies of these species in the Amazon rainforest environment. Diagnostic structural features include stoma typology, central veins and margin forms, type of mesophyll, and the presence of schlerenchymatous sheaths in the cortex, among others. Among the bioactive compounds related to defense adaptation are phenolic compounds, which occur in all three species, and alkaloids and mucilage, which are exclusive to E. laminarioides. Of the three species studied, E. laminarioides has features that make it the best suited to the rainforest environment.

Aplica??es taxon?micas da anatomia foliar de espécies amaz?nicas de Oenocarpus Mart. (Arecaceae)
Silva, Rolf Junior Ferreira;Potiguara, Raimunda Concei??o de Vilhena;
Acta Botanica Brasilica , 2008, DOI: 10.1590/S0102-33062008000400011
Abstract: our aim was to study the leaf anatomy of oenocarpus bacaba mart., o. distichus mart., o. mapora h. karst. and o. minor mart. in order to verify if there are qualitative anatomical features useful in taxonomy. common features of the four species' leaflets are amphistomatic lamina; heteromorphic epidermal tissue; smooth cuticle; epicuticular wax in the form of hooked filaments and rectangular plates; tetracytic stomata; non-glandular, two-filamented trichomes; dorsiventral mesophyll with brachysclereids, mucilage secretory structures, type iii secondary, with three metaxylem vessels, and tertiary vascular bundles. however, cyclocytic stomata; number of expansion tissue layers; shape of midrib and edge were peculiar to some taxa. the middle and central regions of the leaf axis differ among oenocarpus mart. species in cell shape and organization of the parenchyma tissue. an anatomical key is given for the species of oenocarpus mart., showing that there are significant qualitative structural differences among these species.
Substancias ergásticas foliares de espécies amaz?nicas de Oenocarpus Mart. (Arecaceae): caracteriza??o histoquímica e ultra-estrutural
Silva, Rolf Junior Ferreira;Vilhena Potiguara, Raimunda Concei??o de;
Acta Amazonica , 2009, DOI: 10.1590/S0044-59672009000400007
Abstract: the purpose of this study was to diagnose and characterize the leaf ergastic substance of oenocarpus bacaba mart., o. distichus mart., o. mapora h. karst. and o. minor mart. by light and scanning electron microscopy, histochemical analyses and physical microanalyses. transverse and longitudinal sections as well as maceration were made in fixed botanical material. the histochemical analyses were made in non-fixed botanical material, using specific tests for mucilage, starch and silica. an energy dispersive spectroscopy (eds) detector was used for the physical microanalyses. in the oenocarpus mart. species studied, the leaf ergastic substances corresponded to amorphous mucilage, simple-type polyhedrical starch grain and opaline silica in the shape of elliptical and spherical, globular of pointed surface bodies, both with silicon dioxide in the correct concentration. the microscopic observations, histochemical analyses and physical microanalyses permitted us to diagnose, characterize and elucidate the structure and ultrastructure of the ergastic substances occurring in the leaves of the analyzed oenocarpus mart. taxa.
Morfometria das fibras das folhas de Astrocaryum murumuru var. murumuru Mart. (ARECACEAE)
Rocha, Clarisse Beltr?o Rosas;Potiguara, Raimunda Concei??o de Vilhena;
Acta Amazonica , 2007, DOI: 10.1590/S0044-59672007000400005
Abstract: the analysis morphometric of the leaf fibers of astrocaryum murumuru var. murumuru mart. demonstrated that the petiole's fibers had presented length and wall thickness superiors than the rachis and leaflets, with yours means varying of 1.266,09 μm to 3.270,56 μm and 5,56 μm to 10,67 μm, respectively. in relation the index of runckel and flexibility's coefficient the petiole and rachis had gotten values considered favorable for its use in the paper industry and, the felting index it probably demonstrated that the fibers of these regions will present good crash resistance when submitted to the evaluations physical-mechanical. therefore, the results show the species is a alternative source of raw material to produce paper, but its necessary to do physical-mechanical resistance studies to consolidate this pre diagnostic.
Leaf architecture of Eugenia L. (Myrtaceae) on the Algodoal, Maiandeua peninsula, Pará
Adalgisa da Silva Alvarez,Raimunda Concei??o de Vilhena Potiguara,Jo?o Ubiratan Moreira dos Santos
Boletim do Museu Paraense Emílio Goeldi : Ciências Naturais , 2006,
Abstract: A study was carried out on the pattern of leaf-blade venation of six species of Eugenia L. (Myrtaceae), that occur in Algodoal, Maiandeua, Pará. All species which were found have brochidodromous venation. Although the species could not be separated on the basis of leaf venation pattern, however differences in anatomical characters were discovered that allowed the construction of an identification key to the species.
Fibras vegetais utilizadas na pesca artesanal na microrregi?o do Salgado, Pará
Oliveira, Jorge;Potiguara, Raimunda Concei??o de Vilhena;Lobato, Luiz Carlos Batista;
Boletim do Museu Paraense Emílio Goeldi. Ciências Humanas , 2006, DOI: 10.1590/S1981-81222006000200009
Abstract: plant-derived fibers used in small-scale fisheries of the salgado region of pará state, brazil. fiber-providing plants occupy a distinctive place in the daily life of traditional amazonian communities, next to medicinal plants, food plants, and timber species. in the salgado region of pará state, brazil, on the atlantic coast (municipalities of colares, curu?á, magalh?es barata, maracan?, marapanim, salinópolis, santarém novo, s?o caetano de odivelas, s?o jo?o de pirabas, and vigia) plant-derived fibers are used in basketwork, ropes, construction reinforcements (in place of nails), body adornments, and clothing. for this survey, data were obtained from craft workers and fishermen in the salgado region, in about 150 semi-structured interviews. in all, 17 plant species in eight botanical families and 17 genera are used in the preparation of fishing gear. supports are made from the stems of marantaceae and stipes of arecaceae, woven elements are the aerial roots of araceae and cyclanthaceae and the stems of vine-like bignoniaceae and dilleniaceae, and roofing thatch is made from the leaves and midribs of arecaceae. the most represented family in terms of number of species and uses was arecaceae, with 8 species, followed by dilleniaceae and araceae, each with 2 species, and bignoniaceae, bombacaceae, cyclanthaceae, marantaceae, and poaceae, each with a single utilized species. in addition, this paper provides information on these fiber-producing plants, in terms of their morphology, the origin and manipulation of plant materials by craftsmen, and the produced artifacts and their uses, as well as reporting cultural aspects of fibrous plant use in daily fishing activities in the salgado region.
Histochemical and ultrastructure characterization of stem of Socratea exorrhiza (Mart.) H. Wendl. (Arecaceae)
Tatiani Yuriko Pinheiro Kikuchi,Raimunda Concei??o de Vilhena Potiguara,Pedro Paulo dos Santos
Boletim do Museu Paraense Emílio Goeldi : Ciências Naturais , 2007,
Abstract: The aim of this work was to caracterize ergastics substances in stem of the Socratea exorrhiza (Mart.) H. Wendl., according to the point of view of the scanning electron microscopy. The histochemical analyses were carried with in natura samples from in the island of the Cumbu, Pará. The lugol was used to evidence the presence of starch grains; phenol crystals to silica; and acid clorídrico 10% + acid ascetic glacial, to crystals of calcium’s oxalate. The scanning electron microscopy showed triangular, ellipse and ellipsoidal starch grains, over there of calcium’s oxalate and silica crystals.
Vegetal fibers used in artisan fishing in the Salgado region, Pará
Jorge Oliveira,Raimunda Concei??o de Vilhena Potiguara,Luiz Carlos Batista Lobato
Boletim do Museu Paraense Emílio Goeldi. Ciências Humanas , 2006,
Abstract: Plant-derived fibers used in small-scale fisheries of the Salgado region of Pará state, Brazil. Fiber-providing plants occupy a distinctive place in the daily life of traditional Amazonian communities, next to medicinal plants, food plants, and timber species. In the Salgado region of Pará state, Brazil, on the Atlantic coast (municipalities of Colares, Curu á, Magalh es Barata, Maracan , Marapanim, Salinópolis, Santarém Novo, S o Caetano de Odivelas, S o Jo o de Pirabas, and Vigia) plant-derived fibers are used in basketwork, ropes, construction reinforcements (in place of nails), body adornments, and clothing. For this survey, data were obtained from craft workers and fishermen in the Salgado region, in about 150 semi-structured interviews. In all, 17 plant species in eight botanical families and 17 genera are used in the preparation of fishing gear. Supports are made from the stems of Marantaceae and stipes of Arecaceae, woven elements are the aerial roots of Araceae and Cyclanthaceae and the stems of vine-like Bignoniaceae and Dilleniaceae, and roofing thatch is made from the leaves and midribs of Arecaceae. The most represented family in terms of number of species and uses was Arecaceae, with 8 species, followed by Dilleniaceae and Araceae, each with 2 species, and Bignoniaceae, Bombacaceae, Cyclanthaceae, Marantaceae, and Poaceae, each with a single utilized species. In addition, this paper provides information on these fiber-producing plants, in terms of their morphology, the origin and manipulation of plant materials by craftsmen, and the produced artifacts and their uses, as well as reporting cultural aspects of fibrous plant use in daily fishing activities in the Salgado region.
Leaf anatomy of Xylopia L. (Annonaceae), occurring in Ecological Park of Gunma, Santa Bárbara, Pará State
Eliane Francisca de Almeida,Raimunda Concei??o de Vilhena Potiguara,Eunice Gon?alves Macedo,Alba Lúcia Ferreira de Almeida Lins
Boletim do Museu Paraense Emílio Goeldi : Ciências Naturais , 2009,
Abstract: Annonaceae shows several species which are producers of essential oil, among them Xylopia genus, that shows medicinal, pharmacological and biological properties. Thereby the present study has the purpose of knowing leaf anatomy, identify and locate secretory structures, besides to realize histochemical tests in Xylopia benthamii R.E. Fries and X. nitida Dunal species. Slides of epidermal dissociation were prepared to carry out this study, maceration, histological cuts and histochemical tests, according to usual protocols in plant anatomy, using optical light microscopy and electronic scanning. The results showed that both species differed in epidermal cell walls shape on adaxial surface, they present papillose abaxial surface, margin ending in vascular bundles, the stomata is located under epidermal cell level, striate cuticle and marginal vein presence. Before the results, the leaf anatomy of taxa studied helped to segregate them and made it possible to locate the secretory structures on both studied species.
Morpho-anatomical characterization of stems of Cyperus articulatus L. and C. prolixus H.B.K. (Cyperaceae)
Pedro Paulo dos Santos,Raimunda Concei??o de Vilhena Potiguara,Alba Lúcia Ferreira de Almeida Lins,Eunice Gon?alves Macedo
Boletim do Museu Paraense Emílio Goeldi : Ciências Naturais , 2012,
Abstract: Cyperus articulatus and C. prolixus are known as priprioca and priprioc o, respectively. In these species, there are disagreements on the nomenclature of the stems, which receive different names, causing difficulties in the taxa identification. The objective of this paper is the characterization of the C. articulatus and C. prolixus stems, through the description of morphology, morphometric data, function, anatomy and histochemistry. Samples were collected in a growth experiment in the Universidade Federal Rural da Amaz nia (UFRA), Belém municipality, and the plants are originally from Acará municipality, Pará state. The material was described, measured, fixed in FAA70, and studied following usual anatomy techniques and histochemical tests. The stems are of two types rhizome and corm. They are subterranean, plagiotropic and surrounded by cataphylls. Therhizome is monopodial and cylindrical, while the corm is swollen. These two stems are perennial, the corm has propagation function and the rhizome has expansion function. Regarding anatomy, these stems have active primary thickening meristem, but only corms have secondary thickening meristem activity and produce adventitious roots.
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