Results 71 to 80 of about 351 (161)

Gastroprotective effect of the Mapuche crude drug Araucaria araucana resin and its main constituents

Journal of Ethnopharmacology, 2005
The resin from the tree Araucaria araucana (Araucariaceae) has been used since pre-columbian times by the Mapuche amerindians to treat ulcers. The gastroprotective effect of the resin was assessed in the ethanol-HCl-induced gastric ulcer in mice showing a dose-dependent gastroprotective activity at 100, 200 and 300 mg/kg per os.
Schmeda-Hirschmann, G., Astudillo, L., Rodriguez, J., Theoduloz, C., Yanez, T.   +4 more
openaire   +4 more sources

Arbuscular mycorrhizal infection in two morphological root types of Araucaria araucana (Molina) K. Koch Infección por micorrizas arbusculares en dos tipos de raíces de Araucaria araucana (Molina) K. Koch

Revista Argentina de Microbiología, 2010
Araucaria araucana (Molina) K. Koch is a conifer distributed in the Andean-Patagonian forests in the south of Argentina and Chile. The main objective of this work was to relate the different root classes appearing in A.
P. Diehl, S. B. Fontenla
doaj  

Vegetation responses to past volcanic disturbances at the Araucaria araucana forest-steppe ecotone in northern Patagonia. [PDF]

Ecol Evol, 2022
Moreno-Gonzalez R.
europepmc   +1 more source

Efectos de la producción de semillas y la heterogeneidad vegetal sobre la supervivencia de semillas y el patrón espacio-temporal de establecimiento de plántulas en Araucaria araucana Araucaria araucana temporal and spatial seedling establishment patterns: masting, seed predation and understory vegetation effects

Revista Chilena de Historia Natural, 2009
El establecimiento de plántulas puede estar limitado por la producción de semillas y asociada a la producción intermitente y sincronizada de semillas (masting) y/o por granivoría, o por falta de micrositios aptos para la germinación y crecimiento de las ...
JAVIER SANGUINETTI, THOMAS KITZBERGER
doaj  

Leaf life spans of some conifers of the temperate forests of South America Longevidad foliar de algunas coníferas de los bosques templados de Sudamérica

Revista Chilena de Historia Natural, 2001
Interspecific variation in leaf life span has wide-ranging implications for plant species sorting on resource availability gradients, and for ecosystem processes such as nutrient cycling.
CHRISTOPHER H. LUSK
doaj  

Producción de semillas de Araucaria araucana (Molina) K. Koch durante 15 años en diferentes poblaciones del Parque Nacional Lanín (Neuquén-Argentina)

Ecología Austral, 2014
Ecología Austral, 24:265-275 (2014) Los estudios sobre producción de semillas en especies arbóreas son importantes para la ciencia y para el manejo de los bosques nativos.
Javier Sanguinetti
doaj   +1 more source

Incendios en bosques de Araucaria araucana y consideraciones ecológicas al madereo de aprovechamiento en áreas recientemente quemadas Wildfire in Araucaria araucana forests and ecological considerations about salvage logging in areas recently burned

Revista Chilena de Historia Natural, 2007
El fuego es el tipo de disturbio más importante en conformar el paisaje forestal de Araucaria araucana en la zona centro-sur de Chile y Argentina. En la Región de la Araucanía el clima y el ser humano han influenciado el régimen de fuego durante al menos
MAURO E GONZÁLEZ, THOMAS T VEBLEN
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Developmental timing in the female reproductive cycle of Araucaria araucana : seasonality and evolutionary perspectives

Annals of Botany
Abstract Background and Aims Shifts in the timing and rate of reproductive development have played a central role in plant evolution, often being shaped by seasonal climates. Araucariaceae provides a valuable opportunity to study developmental timing across climates: while most species inhabit ...
Vera L Emprin, Gabriela Gleiser, Juca A B San Martín, Andrea G Reutemann, Karina L Speziale, Carolina I Calviño, Raúl E Pozner   +6 more
openaire   +3 more sources

Araucaria araucana and the Austral parakeet: pre-dispersal seed predation on a masting species El pehuén y la cachaña: depredación predispersión de una especie "masting"

Revista Chilena de Historia Natural, 2008
Pre-dispersal seed predation by Austral parakeets, Enicognathus ferrugineus, on pehuén, Araucaria araucana, was studied to assess the relationship between predation and seed production. We collected falling seeds in four araucaria forests of southwestern
JOHN D SHEPHERD, REBECCA S DITGEN, JAVIER SANGUINETTI   +2 more
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Branch whorls of juvenile Araucaria araucana (Molina) Koch: are they formed annually? Los verticilos de juveniles de Araucaria araucana (Molina) Koch: ¿son formados anualmente?

Revista Chilena de Historia Natural, 2000
The growth of Araucaria araucana, like that of many other conifers, is characterised by the production of a monopodial stem with branch whorls. However, the periodicity of whorl formation in this species has not been subjected to systematic study.
CHRISTOPHER H. LUSK, CARLOS LE-QUESNE
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