Flora das cangas da Serra dos Carajás, Pará, Brasil: Loranthaceae

Caires, Claudenir Simões

doi:10.1590/2175-7860201869111

Rodriguésia

2018

DOI: 10.1590/2175-7860201869111

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Flora das cangas da Serra dos Carajás, Pará, Brasil: Loranthaceae

Claudenir Simões Caires

Abstract: Resumo Este trabalho apresenta descrições e comentários morfológicos e ecológicos para as espécies de Loranthaceae registradas para as cangas da Serra dos Carajás no estado do Pará. Foram registrados cinco gêneros e nove espécies, a saber: Oryctanthus alveolatus, O. florulentus, Passovia disjectifolia, P. pedunculata, P. pyrifolia, Peristethium reticulatum, Psittacanthus eucalyptifolius, Struthanthus marginatus e S. polyrhizus.

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Cited by 4 publications

References 19 publications

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Cangas da Amazônia: a vegetação única de Carajás evidenciada pela lista de fanerógamas

et al. 2018

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Resumo Nas cangas da Floresta Nacional (FLONA) de Carajás e no Parque Nacional dos Campos Ferruginosos (PNCF) foram registradas 856 espécies, distribuídas em 116 famílias de fanerógamas. As famílias mais ricas foram Poaceae (86), Fabaceae (65) e Rubiaceae (46). O hábito herbáceo foi o melhor representado. Dois gêneros, 24 espécies e uma subespécie são apontadas como endêmicas das cangas da área de estudos. Na FLONA de Carajás, a Serra Norte, com maior amostragem, possui 659 espécies de fanerógamas e na Serra Sul foram registradas 545 espécies. Aproximadamente 60% das espécies documentadas na área de estudos, incluindo espécies endêmicas, não possuem registro para o PNCF. Através da lista taxonômica aqui apresentada, foi possível demonstrar considerável distinção entre as cangas da Serra dos Carajás e as do Quadrilátero Ferrífero, em Minas Gerais, apontando também pouca correspondência dessas duas listas com a canga de Corumbá, no Mato Grosso do Sul. A riqueza e singularidade da flora da região, que inclui diversas espécies endêmicas, associada à ameaça a que estão submetidos estes ambientes por atividades de mineração, apontam para a necessidade de um planejamento para conservação das espécies da flora das cangas de Carajás.

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Cangas da Amazônia: a vegetação única de Carajás evidenciada pela lista de fanerógamas

et al. 2018

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Flora of Ceará, Brazil: Loranthaceae

et al. 2022

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This study provides a taxonomic treatment for the species of Loranthaceae in the state of Ceará, Northeastern Brazil. The survey was made based on the previous consultation of virtual herbaria, in loco visits, material loans, and photographs of diagnostic traits sent by herbarium curators. Morphological traits and geographic coordinates of all specimens collected in the State were recorded to prepare the distribution maps, identification key, and taxonomic descriptions for each taxon. A total of 184 specimens (discounting duplicates) from 30 herbaria were studied. Eight species are recorded for Ceará: Passovia pedunculata, Passovia pyrifolia, Psittacanthus cordatus, Psittacanthus dichroos, Psittacanthus eucalyptifolius, Struthanthus marginatus, Struthanthus polyrrhizus, and Struthanthus syringifolius. None are included in the IUCN Red List. However, four of them were collected inside protected areas (i.e., Passovia pedunculata, Psittacanthus cordatus, S. polyrrhizus, and S. syringifolius).

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Effects cytotoxic and genotoxic of Psittacanthus acinarius and Psittacanthus cordatus (mistletoe) on Allium cepa

et al. 2022

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This study assessed the cytotoxic and genotoxic potentials of extracts of Psittacanthus acinarius (Mart.) Mart. and Psittacanthus cordatus (Hoffmanns.) in the root cell cycle of Allium cepa L. Aqueous leaf extracts of P. acinarius and P. cordatus at three concentrations: 0.00, 5 and 20 mg/mL for 24 hours. Histological slides were prepared and mitotic indices (MI %) and chromosomal alteration indices (CAI %) were determined. Inhibitory effects of the aqueous extract of leaves of P. acinarius were observed in 46.33 and 46.00% at concentrations of 5 and 20 mg/mL, respectively, in relation to the control (62.83%), in addition to a higher chromosomal alteration index by 0.26% at a concentration of 20 mg/mL. In the aqueous extract of leaves of P. cordatus, the greatest inhibitory effects were 33.83 and 35.50% in the concentrations of 5 and 20 mg/mL, respectively, in relation to the control (88.16%) and the highest alteration index chromosomal (3.30%) at 5 mg/mL. The aqueous leaf extracts of P. acinarius and P. cordatus at concentration of 5 and 20 mg/mL inhibit MI %, reveal an irregular recovery or prevent it, and induce chromosomal alterations, suggesting cytotoxic and genotoxic effects on division of meristematic cells of A. cepa.

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Flora das cangas da Serra dos Carajás, Pará, Brasil: Loranthaceae

Cited by 4 publications

References 19 publications

Cangas da Amazônia: a vegetação única de Carajás evidenciada pela lista de fanerógamas

Cangas da Amazônia: a vegetação única de Carajás evidenciada pela lista de fanerógamas

Flora of Ceará, Brazil: Loranthaceae

Effects cytotoxic and genotoxic of Psittacanthus acinarius and Psittacanthus cordatus (mistletoe) on Allium cepa

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