scholarly journals CAPACIDADE DE PRODUÇÃO DE ÓLEO DE PENTACLETHRA MACROLOBA (WILLD.)KUNTZE. EM UMA FLORESTA NA COMUNIDADE TAUERÁ, ABAETETUBA, PARÁ.

2020 ◽  
Author(s):  
João Lucas Sauma Alvares ◽  
Jéssica Sueli Pereira Da Silva ◽  
Elvis Rabelo Da Silva ◽  
Victor Cesar Da Silva Oliveira ◽  
Gracialda Costa Ferreira
Keyword(s):  
Pentaclethra Macroloba

La respuesta compensatoria de Pentaclethra macroloba ante tratamientos antagónicos: la fertilización y la defoliación

2019 ◽  
Author(s):  
Alejandra Pérez Enríquez ◽  
Roberto Cordero ◽  
Elizabeth Braker
Keyword(s):  
Costa Rica ◽  
Pentaclethra Macroloba

La combinación de rasgos como la fijación de nitrógeno en plantas tropicales con otros rasgos como disponibilidad nutricional podría incidir en el éxito de algunas especies para su establecimiento y desarrollo. Otras interacciones como la herbivoría podrían cambiar sutilmente estas relaciones y llegar a ser relevantes para su éxito ecológico. Sometimos brinzales de Pentaclethra macroloba (Gavilán, Fabaceae) en macetas, con y sin adición de nutrientes y a la interacción con defoliación controlada (herbivoría artificial), en el sotobosque secundario dentro de un bosque de Sarapiquí, Costa Rica. La biomasa total muestra una fuerte compensación neta y la defoliación indujo una mayor asignación al follaje. La fertilización siempre resultó en menos asignación a nódulos. La esbeltez respondió a ambos factores de manera sinergística. Sugerimos que la herbivoría puede ocasionar cambios importantes en la manera en que las especies asignan sus recursos en concordancia con sus simbiosis y la disponibilidad de nutrientes.

Deacidification of Amazonian Pracaxi (Pentaclethra macroloba) and Patawa (Oenocarpus bataua) oils: experimental and modeling of liquid–liquid extraction using alcoholic solvents

2020 ◽  
Vol 37 (4) ◽  
pp. 783-794 ◽  
Author(s):  
Ericsem Pereira ◽  
Débora Tamires Vitor Pereira ◽  
Marcela C. Ferreira ◽  
Julian Martínez ◽  
Antonio J. A. Meirelles ◽  
...  
Keyword(s):  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Pentaclethra Macroloba

Triterpenoid saponins, new metalloprotease snake venom inhibitors isolated from Pentaclethra macroloba

Toxicon ◽  
2007 ◽  
Vol 50 (2) ◽  
pp. 283-291 ◽  
Author(s):  
Jocivânia O. da Silva ◽  
Renata S. Fernandes ◽  
Fábio K. Ticli ◽  
Clayton Z. Oliveira ◽  
Maurício V. Mazzi ◽  
...  
Keyword(s):  
Snake Venom ◽  
Triterpenoid Saponins ◽  
Pentaclethra Macroloba

Aerial root nodules in the tropical legume,Pentaclethra macroloba

Oecologia ◽  
1989 ◽  
Vol 80 (1) ◽  
pp. 27-31 ◽  
Author(s):  
Cynthia A. Walter ◽  
Amos Bien
Keyword(s):  
Root Nodules ◽  
Tropical Legume ◽  
Pentaclethra Macroloba

scholarly journals SPATIAL DISTRIBUTION OF A POPULATION OF Pentaclethra macroloba (Willd.) KUNTZE IN A FLOODPLAIN FOREST OF THE AMAZON ESTUARY1

2018 ◽  
Vol 41 (4) ◽  
Author(s):  
Adelson Rocha Dantas ◽  
Luiz Carlos Marangon ◽  
Marcelino Carneiro Guedes ◽  
Ana Lícia Patriota Feliciano ◽  
Ana Claudia Lira-Guedes
Keyword(s):  
Spatial Distribution ◽  
Population Density ◽  
Basal Area ◽  
Floodplain Forest ◽  
Floodplain Forests ◽  
Breast Height ◽  
Management Plans ◽  
Pentaclethra Macroloba ◽  
Successful Establishment ◽  
Diameter Classes

ABSTRACT We analyzed the spatial distribution pattern of Pentaclethra macroloba to assist in the development of management plans and conservation of this species in estuarine floodplain forests. The study was conducted in an area of floodplain forest of 55.94 ha, in Mazagão, Amapá, Brazil. A census was performed and all individuals of ≥ 30 cm circumference at breast height (CBH), living and dead, were georeferenced. Ripley’s K function was used to analyze the spatial distribution of the population, including mortality and diameter classes. The relationships between distance to the edge of inundation and density and basal area of the population were analyzed using linear regression. We recorded 993 live individuals and 22 dead. The distribution of the population was found to vary with the topographic gradient associated with the distance to the edge of the inundation. Diameter classes 1 (≤ 13.2 cm) and 2 (≤ 18.6 cm) were spatially aggregated close to the water and randomly distributed far from the water. Classes 3 (≤ 24.0 cm) and 4 (≤ 29.5 cm) were aggregated at all distances, and classes 5 (≤ 34.9 cm), 6 (≤ 40.3 cm), 7 (≤ 45.7 cm) and 8 (≤ 51.2 cm), were randomly distributed at all distances. Mortality was randomly distributed. The population density was 18 trees h-1 with a basal area of 49 m2 h-1, and both density (r2=0.51; p=0.0195) and basal area (r2=0.67; p=0.0039) increased with the distance from the edge of the inundation. We conclude that the spatial distribution and successful establishment of this species in floodplain forest are related to the dynamics of flooding and the resultant impacts on dispersal processes.

scholarly journals Efecto de la reproducción clonal en la estructura genética de Pentaclethra macroloba (Fabaceae: Mimosoideae)

2014 ◽  
Vol 62 (2) ◽  
pp. 443 ◽  
Author(s):  
Keith D. Gaddis ◽  
Helen L. Zukin ◽  
Inca A. Dieterich ◽  
Elizabeth Braker ◽  
Victoria L. Sork
Keyword(s):  
Pentaclethra Macroloba

scholarly journals Morphological aspects and anatomy of the fruit, seeds and seedlings of Pentaclethra macroloba (willd.) Kuntze (Fabaceae)

2019 ◽  
Vol 41 (4) ◽  
pp. 452-460
Author(s):  
Rubiene Neto Soares ◽  
Ronaldo Oliveira dos Santos ◽  
Breno Marques da Silva e Silva
Keyword(s):  
Electron Microscope ◽  
Morphological Traits ◽  
Abaxial Surface ◽  
Anatomical Analysis ◽  
Morphological Aspects ◽  
Fruit Samples ◽  
Parenchyma Cells ◽  
Pentaclethra Macroloba ◽  
Thin Walled ◽  
Scanning Electron

Abstract: The aim of this study was to describe the morphology of fruit, seeds and seedlings, as well as the anatomy of the seed and the seedling of Pentaclethra macroloba (Willd.) Kuntze. Morpho-biometry was performed on fifty fruit samples and one hundred seeds. To describe the sequences of the morphological events of the germination stages, ten seeds were placed to germinate. Anatomical analysis was performed in a scanning electron microscope with seed samples and seedling leaves. The species has leguminous type fruit of 16.1 to 45.2 cm length and 4.1 to 7.3 cm width; seeds have a pleurogram and are eurispermic, ovoid, deltoid to elliptical and measure from 3.8 to 6.1 cm length and 2.5 to 5.7 cm width. Anatomically, the cotyledons are composed of thin-walled parenchyma cells with various oil cells. The seedlings have bipinnate leaves, with waxes and simple trichomes at the margins of the adaxial surface and paracytic stomata on the abaxial surface. The epicotyl is slightly twisted, with caducous cataphylls and a first pair of alternate eophylls. Germination is of the phanero-hypogean-reserve type. Taxonomic recognition of this species is possible in the field through the external morphological traits and can help in identification of saplings.

scholarly journals Fitossociologia de uma Floresta Ombrófila Densa na Amazônia Setentrional, Roraima, Brasil

2013 ◽  
Vol 43 (3) ◽  
pp. 247-259 ◽  
Author(s):  
Tiago Monteiro Condé ◽  
Helio Tonini
Keyword(s):  
Pentaclethra Macroloba

O presente estudo teve como objetivo caracterizar a composição florística e fitossociológica de uma floresta nativa no município de Caracaraí, Roraima, Brasil. Foram inventariadas todas as árvores com DAP > 10 cm em 9 parcelas permanentes de 100 x 100 m (1 ha cada). Foram observados 4.724 indivíduos (525ind.ha-1), distribuídos em 42 famílias botânicas, 111 gêneros e 165 espécies. As famílias com maior número de indivíduos foram Fabaceae (1.883), Lecythidaceae (609) e Sapotaceae (434), perfazendo 52% do total de indivíduos amostrados. O grupo composto por espécies pioneiras apresentou maior número de indivíduos (219ind.ha-1), seguido das secundárias (193ind.ha-1) e climácicas (113ind.ha-1). No entanto, as secundárias obtiveram maior número de espécies (95), em detrimento de climácicas (44) e pioneiras (26). O índice de diversidade de Shannon (H' = 3,27) e o valor de equabilidade de Pielou (J = 0,64) foram inferiores aos obtidos em outros inventários florísticos na Amazônia Legal, contribuindo para isso o tamanho populacional de Pentaclethra macroloba. As espécies Pentaclethra macroloba (52,1), Eschweilera bracteosa (23,7) e Pouteria caimito (8,1) apresentaram os maiores valores de importância, perfazendo 28% do VI total. A maior parte dos indivíduos amostrados (71,3% = 374ind.ha-1) foram registrados no estrato médio (12,4 m < altura < 26,5 m) da floresta. A comunidade florestal pode ser considerada bem estruturada, madura e diversa, portanto em bom estado de conservação.

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