Results 1 to 10 of about 72 (50)

Kauranoid Diterpenes in Ruilopezia margarita [PDF]

open access: yesPlanta Medica, 1979
Tropical high andean ecosystems, known as paramos, are unique because they are highly diverse, have a high number of endemic species, and play an essential role in different ecosystem services, but are especially susceptible to climate change. Most of the giant rosettes, a dominant growth-form in the paramos, depend on unique features like stems ...
A. Usubillaga, T. Nakano
core   +5 more sources

Chemical Composition and Antibacterial Activity of the Essential Oil of [PDF]

open access: yesNatural Product Communications, 2015
The essential oil from the leaves of Ruilopezia bracteosa was obtained by hydrodistillation, and analyzed by GC-MS. Eighteen components, which made up 99.6% of the oil were identified, the most abundant being β-myrcene (34.2%), α-pinene (24.3%), 7-epi-α ...
Libia Alarcón   +6 more
doaj   +3 more sources

Geography shapes the phylogeny of frailejones (Espeletiinae Cuatrec., Asteraceae): a remarkable example of recent rapid radiation in sky islands [PDF]

open access: yesPeerJ, 2017
Background The páramo ecosystem, located above the timberline in the tropical Andes, has been the setting for some of the most dramatic plant radiations, and it is one of the world’s fastest evolving and most diverse high-altitude ecosystems.
Mauricio Diazgranados, Janet C. Barber
doaj   +4 more sources

Water relations and gas exchange in Ruilopezia atropurpurea (Asteraceae), a giant rosette growing under contrasting microclimates in the high tropical Andes.

open access: yesCaldasia, 2021
Tropical high andean ecosystems, known as paramos, are unique because they are highly diverse, have a high number of endemic species, and play an essential role in different ecosystem services, but are especially susceptible to climate change. Most
Fermín Rada1,3*, , Antonio Navarro
doaj   +1 more source

A nomenclator for the frailejones (Espeletiinae Cuatrec., Asteraceae)

open access: yesPhytoKeys, 2012
The páramos and high Andean forests of the tropical Andes are largely dominated by frailejones (Espeletiinae Cuatrec., Asteraceae). These plants are ecologically and culturally essential for both ecosystems and local inhabitants.
Mauricio Diazgranados
doaj   +1 more source

Antimicrobial, Antioxidant, and Immunomodulatory Properties of Essential Oils: A Systematic Review [PDF]

open access: yes, 2019
Essential oils (EOs) are a mixture of natural, volatile, and aromatic compounds obtained from plants. In recent years, several studies have shown that some of their benefits can be attributed to their antimicrobial, antioxidant, anti-inflammatory, and ...
Gil Hernández, Ángel   +3 more
core   +3 more sources

Angiosperm floristic richness deposited in the José Antonio Casadiego Herbarium (UCOB), Venezuela [PDF]

open access: yes, 2015
A total of 6634 vascular plant specimens deposited in the UCOB Herbarium from Lara state until 2014 were reviewed in order to improve our knowledge about the flora.
Alcides A. Mondragón-Izquierdo   +1 more
core   +4 more sources

Phytoregionalisation of the Andean páramo [PDF]

open access: yes, 2019
Background: The pa´ramo is a high-elevation biogeographical province in the northern Andes, known for its great biodiversity and ecosystem services. Because there have been very few biogeographic studies encompassing the entire province to date, this ...
Balslev, Henrik   +2 more
core   +1 more source

Caracterización química y actividad antimicrobiana del aceite esencial de las hojas de Libanothamnus neriifolius (Asteraceae) [PDF]

open access: yes, 2019
The essential oil of the fresh leaves of Libanothamnus neriifolius (B. ex H) Ernst. was obtained by the hydrodistillation method using the Clevenger trap, obtaining 1.8 mL (0.087% yield).
Aparicio-Zambrano, Rosa   +5 more
core   +2 more sources

Caracterización de los lepidópteros fitófagos asociados a la herbivoría de frailejones en la microcuenca de la quebrada Calostros del Parque Nacional Natural Chingaza [PDF]

open access: yes, 2013
The paramo ecosystem is one of the most sensitive to changes in climate and land use. These changes in physical conditions may lead to changes in species composition and their life cycles, increasing susceptibility to attack by pathogens and other ...
Fuentes, Luz Stella   +2 more
core   +4 more sources

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