Psychotria
Mostrando 1-12 de 146 artigos, teses e dissertações.
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1. Structure, floristic composition and environmental relationships of natural regeneration in a semideciduous seasonal forest
Resumo O objetivo deste estudo foi descrever a florística e estrutura da regeneração natural do estrato arbustivo-arbóreo em um fragmento florestal no sul do estado do Espírito Santo, bem como verificar a interação da vegetação com algumas variáveis ambientais selecionadas. Foi desenvolvido na Reserva Particular do Patrimônio Natural (RPPN) Cafund
Ciência Florestal. Publicado em: 2022
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2. One-Step Isolation of Monoterpene Indole Alkaloids from Psychotria leiocarpa Leaves and Their Antiviral Activity on Dengue Virus Type-2
The leaf MeOH extract of Psychotria leiocarpa (Rubiaceae) showed in vitro non-cytotoxic and anti-dengue virus serotype 2 (DENV2) activity in human hepatocarcinoma cell lineage (HepG2). A one-step and cost-effective reversed-phase solid-phase extraction method based on high-performance liquid chromatography (HPLC) parameters allowed the isolation, directly fr
J. Braz. Chem. Soc.. Publicado em: 2020-10
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3. Anthelmintic activity of plant aqueous extracts against Panagrellus redivivus in vitro
RESUMO O controle de fitonematoides é muito difícil e requer uma combinação de técnicas para ter sucesso. O controle alternativo via extrato vegetal pode resultar na descoberta de substâncias nematicidas. Esta pesquisa objetivou avaliar o efeito de 33 plantas submetidas à extração aquosa contra Panagrellus redivivus in vitro. As concentrações fora
Arq. Inst. Biol.. Publicado em: 25/11/2019
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4. Sustainable production of bioactive alkaloids in Psychotria L. of southern Brazil: propagation and elicitation strategies
ABSTRACT Psychotria is the largest genus in Rubiaceae. South American species of the genus are promising sources of natural products, mostly due to bioactive monoterpene indole alkaloids they accumulate. These alkaloids can have analgesic, antimutagenic, and antioxidant activities in different experimental models, among other pharmacological properties of in
Acta Bot. Bras.. Publicado em: 07/10/2019
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5. Risk of genetic vulnerability and aspects of the reproductive biology of Psychotria ipecacuanha (Rubiaceae), a threatened medicinal plant species of Brazilian forests
ABSTRACT Psychotria ipecacuanha, commonly known as Ipeca, is a medicinal plant of pharmacological and economic value. The species is distylous; it has populations with two floral morphs, one with long and one with short styles. Apart from the presence of two floral morphs in a balanced ratio (1:1), reciprocal herkogamy of the reproductive organs between alte
Acta Bot. Bras.. Publicado em: 12/09/2019
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6. TOXICITY OF ALKALOID FRACTIONS FROM Psychotria spp. (RUBIACEAE) AGAINST Atta sexdens FOREL, 1908 (HYMENOPTERA: FORMICIDAE)
ABSTRACT Leaf-cutting ants are the main pests in forest plantations. The most commonly used chemical control for the ants is toxic bait. However, the active ingredients in these baits have been restricted by forest certification organizations, justifying the search for new active compounds to control these insects. Thus, this work aimed to evaluate the formi
CERNE. Publicado em: 09/09/2019
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7. Insect galls of the Floresta da Cicuta (Volta Redonda, RJ, Brazil)
Abstract Insect galls of the Floresta da Cicuta (Volta Redonda, RJ, Brazil). Galls are changes in the pattern of growth and development of plant tissues or organs in response to the action of an inducing organism, usually an insect. The goal of the present study was to inventory the insect galls of the Floresta da Cicuta (Volta Redonda, RJ, Brazil). The coll
Pap. Avulsos Zool.. Publicado em: 10/07/2018
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8. Florística de Rubiaceae em um remanescente de Floresta Atlântica do Espírito Santo, Brasil
Resumo Este estudo apresenta o inventário florístico atualizado para Rubiaceae no Parque Estadual de Mata das Flores (PEMF), município de Castelo, no Espírito Santo. O remanescente florestal estudado está localizado em uma das áreas prioritárias para conservação da Floresta Atlântica ao sul do estado. A listagem elaborada embasou a análise da simi
Rodriguésia. Publicado em: 2018-06
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9. Influence of Environmental Factors and Cultural Methods on the Content of N,N-Dimethyltryptamine in Psychotriaviridis (Rubiaceae)
Psychotria viridis is one of the species that produces N,N-dimethyltryptamine. Its decoction together with other species, such as Banisteriopsis caapi, produces ayahuasca, a beverage used for ritualistic and medicinal purposes. The goal of this study was to understand how environmental factors and cultivation methods influenced the content of N,N-dimethyltry
J. Braz. Chem. Soc.. Publicado em: 2018-06
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10. Rubiaceae no Município de Camanducaia, Serra da Mantiqueira, Minas Gerais: sinópse e chave interativa
Resumo Este estudo teve como objetivos realizar o levantamento florístico da família no município de Camanducaia, Serra da Mantiqueira, extremo sul de Minas Gerais, onde extensos remanescentes de Mata Atlântica são encontrados, e elaborar uma Chave Interativa de Entradas Múltiplas (CIEM) para a identificação das espécies. O levantamento florístico
Rodriguésia. Publicado em: 2017-09
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11. Chronic intermittent exposure to ayahuasca during aging does not affect memory in mice
The Quechua term ayahuasca refers to a beverage obtained from decoctions of the liana Banisteriopsis caapi with leaves of Psychotria viridis. The ritualistic use of ayahuasca is becoming a global phenomenon, with some individuals using this beverage throughout life, including in old age. Cognitive impairment is a common manifestation during aging. There are
Braz J Med Biol Res. Publicado em: 05/06/2017
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12. An ontogenic study of the behavioral effects of chronic intermittent exposure to ayahuasca in mice
Ayahuasca is a beverage obtained from decoctions of the Banisteriopsis caapi plus Psychotria viridis. In religious contexts, ayahuasca is used by different age groups. However, little is known of the effects of ayahuasca during ontogenic development, particularly with regard to the functional characteristics of the central nervous system. Animal models are u
Braz J Med Biol Res. Publicado em: 05/06/2017