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Pesquisa : B01.650.940.800.575.137.500 [Categoria DeCS]
Referências encontradas : 8 [refinar]
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Texto completo SciELO Brasil
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Id: lil-512626
Autor: Yano, Olga.
Título: Novas ocorrências de briófitas para vários estados do Brasil / New records of bryophytes in the states of Brazil
Fonte: Acta amaz;34(4):559-576, out.-dez. 2004. ilus.
Idioma: pt.
Resumo: Cento e dezesseis espécies de briófitas são relatadas como novas ocorrências em vários estados do Brasil, sendo 62 de musgos, 53 de hepáticas e uma de antóceros. Estas espécies pertencem a 67 gêneros e 36 famílias. Para cada uma das espécies são apresentados dados quanto à distribuição geográfica no Brasil, localidade-tipo, basiônimo, bem como comentários sobre o substrato e as associações com outras espécies, quando pertinente. As espécies Acrolejeunea heterophylla (Evans) Grolle & Gradst., Brachymenium wrightii var. mnioides (Besch.) Florsch., Cheilolejeunea myriantha (Nees & Mont.) Schust., Cololejeunea nigerica (E.W. Jones) Schust., Lejeunea filipes Spruce, Leucodon julaceus (Hedw.) Sull., Macromitrium clavatum Grout, Plagiochila asplenioides (L.) Dumort., Polytrichum brachymitrium C. Muell. e Pylaisiadelpha tenuirostris (Bruch & Schimp. ex Sull.) Buck estão sendo referidas pela primeira vez para o Brasil.

One hundred and sixteen (116) species of bryophytes are reported as new records for certain Brazilian states, distributed in 62 mosses, 53 liverworts and one hornworts. Those species are distributed among 67 genera and 36 families. Geographical distribution in Brazil, type locality, basyonym, comments on substrate, and about association with other bryophytes, when possible. The species Acrolejeunea heterophylla (Evans) Grolle & Gradst., Brachymenium wrightii var. mnioides (Besch.) Florsch., Cheilolejeunea myriantha (Nees & Mont.) Schust., Cololejeunea nigerica (E.W. Jones) Schust., Lejeunea filipes Spruce, Leucodon julaceus (Hedw.) Sull., Macromitrium clavatum Grout, Plagiochila asplenioides (L.) Dumort., Polytrichum brachymitrium C. Muell. and Pylaisiadelpha tenuirostris (Bruch & Schimp. ex Sull.) Buck are new records for Brazil.
Descritores: Bryopsida
Ranunculaceae
Hepatófitas
Briófitas
Anthocerotophyta
Responsável: BR6.1 - BCS - Biblioteca de Ciências da Saúde


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Texto completo SciELO Brasil
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Id: lil-418681
Autor: Lisboa, Regina C. L; Santos, Rita de Cássia P. dos.
Título: Helicophyllaceae (Bryophyta), nova ocorrência para o Estado do Pará, Brasil / Helicophyllaceae (Bryophyta), a new record to Pará State, Brazil
Fonte: Acta amaz;35(3):343-346, jul.-set. 2005. ilus, mapas.
Idioma: pt.
Resumo: Helicophyllaceae, família monotípica neotropical, é registrada pela primeira vez no Estado do Pará. Sua única espécie, Helicophyllum torquatum (Hook.) Brid., registrada anteriormente no Estado do Amazonas e que recentemente havia sido excluída da lista de musgos amazônicos, é apresentada como nova ocorrência para toda a Amazônia brasileira.
Descritores: Botânica
Ecossistema Amazônico
Bryopsida
Responsável: BR6.1 - BCS - Biblioteca de Ciências da Saúde


  3 / 8 LILACS  
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Texto completo SciELO Chile
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Id: biblio-1019510
Autor: Pizarro, Marisol; Contreras, Rodrigo A; Köhler, Hans; Zúñiga, Gustavo E.
Título: Desiccation tolerance in the Antarctic moss Sanionia uncinata
Fonte: Biol. Res;52:46, 2019. tab, graf.
Idioma: en.
Projeto: National Commission for Scientific and Technological Research of Chile (CONICYT); . FONDECYT; . Chilean Antarctic Institute (INACH).
Resumo: BACKGROUND: One of the most extreme environments on our planet is the Maritime Antarctic territory, due to its low-water availability, which restricts the development of plants. Sanionia uncinata Hedw. (Amblystegiaceae), the main colonizer of the Maritime Antarctic, has effective mechanisms to tolerate this environment. It has been described that the tolerance to desiccation is mediated by the hormone abscisic acid (ABA), antioxidants systems, accumulation of compatible solutes and proteins of the late embryogenesis abundant (LEA). However, to date, these mechanisms have not been described in S. uncinata. Therefore, in this work, we postulate that the tolerance to desiccation in the Antarctic moss S. uncinata is mediated by the accumulation of ABA, the osmolytes proline and glycine betaine, and dehydrins (an LEA class 11 proteins). To demonstrate our hypothesis, S. uncinata was subjected to desiccation for 24 h (loss in 95% of water content), and the effects on its physiological, photosynthetic, antioxidant and biochemical parameters were determined. RESULTS: Our results showed an accumulation of ABA in response to water loss, and the activation of protective responses that involves an increment in levels of proline and glycine betaine, an increment in the activity of antioxidant enzymes such as SOD, CAT, APX and POD, and the accumulation of dehydrins proteins. CONCLUSION: The results showed, suggest that S. uncinata is a desiccation-tolerant moss, property mediated by high cellular plasticity regulated by ABA.
Descritores: Fotossíntese/fisiologia
Bryopsida/fisiologia
Dessecação
Antioxidantes/análise
-Fatores de Tempo
Adaptação Fisiológica
Bryopsida/classificação
Bryopsida/química
Regiões Antárticas
Responsável: CL1.1 - Biblioteca Central


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Texto completo SciELO Cuba
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Id: biblio-1094589
Autor: Cools, Evelien; Van-Dijck, Patrick; Avonce, Nelson.
Título: Heterologous protein production in the moss Physcomitrella patens
Fonte: Vaccimonitor (La Habana, Print);26(2), may.-ago. 2017. ilus, tab.
Idioma: es.
Resumo: Over the last decades plants have been used for the heterologous production of pharmaceuticals, industrial enzymes and edible vaccines. The moss Physcomitrella patens is considered as an experimental model of choice for basic molecular, cytological and developmental questions in plant biology, as well as an outstanding plant model system for heterologous protein production. Here we use P. patens to produce osmotin, a tobacco protein with fungicidal properties. We have generated a transgenic plant able to synthesize and secrete a biologically active osmotin protein(AU)

Durante las últimas décadas las plantas han sido utilizadas para la producción heteróloga de farmacéuticos, enzimas de uso industrial y vacunas. El musgo Physcomitrella patens es considerado como un modelo de experimentación de elección para abordar preguntas en las áreas de biología molecular, citología y de biología del desarrollo en plantas; así como un excelente sistema modelo para la producción de proteínas heterólogas. En este trabajo se utilizó P. patens para la producción de osmotina, una proteína de tabaco con propiedades fungicidas. Se generó una planta transgénica capaz de sintetizar y secretar osmotina biológicamente activa(AU)
Descritores: Proteínas Recombinantes
Bryopsida
Responsável: CU1.1 - Biblioteca Médica Nacional


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Texto completo SciELO Chile
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Id: lil-774433
Autor: Zúñiga-González, Paz; Zúñiga, Gustavo E; Pizarro, Marisol; Casanova-Katny, Angélica.
Título: Soluble carbohydrate content variation in Sanionia uncinata and Polytrichastrum alpinum, two Antarctic mosses with contrasting desiccation capacities
Fonte: Biol. Res;49:1-9, 2016. ilus, graf.
Idioma: en.
Projeto: FONDECYT; . INACH FR; . FONDECYT.
Resumo: BACKGROUND: Cryptogamic vegetation dominates the ice-free areas along the Antarctic Peninsula. The two mosses Sanionia uncinata and Polytrichastrum alpinum inhabit soils with contrasting water availability. Sanionia uncinata grows in soil with continuous water supply, while P. alpinum grows in sandy, non-flooded soils. Desiccation and rehydration experiments were carried out to test for differences in the rate of water loss and uptake, with non-structural carbohydrates analysed to test their role in these processes. RESULTS: Individual plants of S. uncinata lost water 60 % faster than P. alpinum; however, clumps of S. uncinata took longer to dry than those of P. alpinum (11 vs. 5 h, respectively). In contrast, rehydration took less than 10 min for both mosses. Total non-structural carbohydrate content was higher in P. alpinum than in S. uncinata, but sugar levels changed more in P. alpinum during desiccation and rehydration (60-50 %) when compared to S. uncinata. We report the presence of galactinol (a precursor of the raffinose family) for the first time in P. alpinum. Galactinol was present at higher amounts than all other non-structural sugars. CONCLUSIONS: Individual plants of S. uncinata were not able to retain water for long periods but by growing and forming carpets, this species can retain water the longest. In contrast individual P. alpinum plants required more time to lose water than S. uncinata, but as moss cushions they suffered desiccation faster than the later. On the other hand, both species rehydrated very quickly. We found that when both mosses lost 50 % of their water, carbohydrates content remained stable and the plants did not accumulate non-structural carbohydrates during the desiccation prosses as usually occurs in vascular plants. The raffinose family oligosaccarides decreased during desiccation, and increased during rehydration, suggesting they function as osmoprotectors.
Descritores: Bryopsida/metabolismo
Metabolismo dos Carboidratos/fisiologia
Carboidratos/análise
Água/metabolismo
-Análise de Variância
Regiões Antárticas
Desidratação
Dissacarídeos/análise
Células Germinativas Vegetais
Fatores de Tempo
Água/análise
Responsável: CL1.1 - Biblioteca Central


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Id: lil-392641
Autor: Villagrán Moraga, Carolina; Barrera, Elizabeth.
Título: Los musgos del archipiélago de Chiloé: Región de Los Lagos, Chile / Mosses of Chiloé archipelago: Lakes Region, Chile.
Fonte: Santiago; Corporación Nacional Forestal; 2002. 24 p. ilus, mapas, tab, graf.
Idioma: es.
Descritores: Bryopsida
-Chile
Responsável: CL27.1 - Biblioteca de Salud Dr. Bogoslav Juricic Turina
CL27.1; QV766, V714m


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Texto completo SciELO Venezuela
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Id: lil-365106
Autor: Villarroel, Mario; Acevedo, Carol; Yáñez, Enrique; Biolley, Edith.
Título: Propiedades funcionales de la fibra del musgo sphagnum magellanicum y su utilización en la formulación de productos de panadería / Functional properties of sphagnum magellanicum fiber and its direct use in formulation of bakery products
Fonte: Arch. latinoam. nutr;53(4):400-407, dic. 2003. tab, graf.
Idioma: es.
Resumo: Se estudiaron las propiedades funcionales de la fibra del musgo Sphagnum magellanicum. determinandose: la capacidad de absosrción (CAA) y retención de agua (CRA), capacidad de absorción de moléculas orgánicas (CAMO), capacidad de hinchamiento (CH) y capacidad de intercambio catiónico (CIC). Fracciones de tamaño de partícula T1 (1.4mm); (1.0mm); T3 (0.425mm); T4 (0.180mm) fueron analizadas para medir su efecto sobre estas propiedades. Las mejores respuestas de CAA, CRA, CAMO y CH se obtuvieron con T3, con la excepción de la CIC cuyo mejor resultado se obtuvo con T1. Se desarrollo una formulación optimizada de pan enriquecido con fibre de musgo analizando simultaneamente el efecto de cuatro variables independientes: levadura, agente esponjante, fibra de musgo y manteca vegetal sobre la calidad sensorial del pan. La variable más significativa (p<0.05) resultó ser la levadura con participación del 50 por ciento sobre la respuesta. Muestras de pan con fiebre se almacenaron a 20 grados centígrados y 6 grados centígrados para determinar su vida útil. La mejor respuesta de calidad sensorial se obtuvo con las muestras refrigeradas, que permanecieron aptas para su consumo por un tiempo de dos semanas
Descritores: Bryopsida
-Ciências da Nutrição
Venezuela
Tipo de Publ: Revisão
Responsável: VE1.1 - Biblioteca Humberto Garcia Arocha


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Texto completo SciELO Brasil
Mortara, Renato A
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Id: lil-340125
Autor: Araya, Jorge e; Neira, Iván; Silva, Solange da; Mortara, Renato A; Manque, Patricio; Cordero, Esteban; Sagua, Hernán; Loyola, Alberto; Bórquez, Jorge; Morales, Glauco; González, Jorge.
Título: Diterpenoids from Azorella compacta (Umbelliferae) active on Trypanosoma cruzi
Fonte: Mem. Inst. Oswaldo Cruz;98(3):413-418, Apr. 2003. ilus, tab.
Idioma: en.
Projeto: International Foundation for Science; . Fondo Nacional de Desarrollo Cientifico y Tecnologico de Chile; . Universidad de Antofagasta. Dirección de Investigacion; . Fundação de Amparo à Pesquisa do Estado de São Paulo.
Resumo: The anti-Trypanosoma cruzi activity of natural products isolated from Azorella compacta was evaluated, with particular emphasis on their effect against intracellular amastigotes. Five diterpenoids from A. compacta derived from mulinane and azorellane were isolated and identified. Only two products, named azorellanol (Y-2) and mulin-11,3-dien-20-oic acid (Y-5), showed trypanocidal activity against all stages of T. cruzi including intracellular amastigotes. At 10 æM, these compounds displayed a strong lytic activity. It ranged from 88.4 ± 0.6 to 99.0 ± 1 percent for all strains and stages evaluate, with an IC50 /18 h values of 20-84 æM and 41-87 æM, respectively. The development of intracellular amastigotes was also inhibited by nearly 60 percent at 25 æM. The trypanocidal molecules Y-2 and Y-5 did show different degrees of cytotoxicity depending on the cell line tested, with an IC50 /24 h ranging from 33.2 to 161.2 æM. We evaluated the effect of diterpenoids against intracellular T. cruzi forms by immunofluorescent identification of a specific membrane molecular marker (Ssp-4 antigen) of the T. cruzi amastigote forms. The accuracy and reproducibility of the measurements were found to be outstanding when examined by confocal microscopy
Descritores: Bryopsida
Diterpenos
Extratos Vegetais
Tripanossomicidas
Trypanosoma cruzi
-Células Cultivadas
Diterpenos
Estudo de Avaliação
Dose Letal Mediana
Microscopia Confocal
Reprodutibilidade dos Testes
Tripanossomicidas
Limites: Animais
Responsável: BR1.1 - BIREME



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