Essential Oil of the Leaves from<i>Espeletia batata</i>Cuatrec

Usubillaga, Alfredo; Khouri, Nancy; Rojas, Luis; Morillo, Marielba

doi:10.1080/10412905.2001.9699725

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…Genes involved in the degradation of aromatic compounds were also identified in our samples, consistent with the presence of compounds in Espeletia sp. plants, such as ␣-pinene, ␤-pinene, ␣-thujene, and longipilin acetate, among others (71)(72)(73), that can shape these populations, particularly in the necromass, where they may be used for the degradation of senescent leaves. Finally, the presence of genes for degradation of organic contaminants suggests that these plants may be more influenced by human intervention than previously thought and opens the possibility of exploiting these communities for bioremediation purposes or in industrial production systems.…”

Section: Figmentioning

confidence: 99%

Microbial and Functional Diversity within the Phyllosphere of Espeletia Species in an Andean High-Mountain Ecosystem

Ruiz-Pérez

Restrepo

Zambrano

2016

Appl Environ Microbiol

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c Microbial populations residing in close contact with plants can be found in the rhizosphere, in the phyllosphere as epiphytes on the surface, or inside plants as endophytes. Here, we analyzed the microbiota associated with Espeletia plants, endemic to the Páramo environment of the Andes Mountains and a unique model for studying microbial populations and their adaptations to the adverse conditions of high-mountain neotropical ecosystems. Communities were analyzed using samples from the rhizosphere, necromass, and young and mature leaves, the last two analyzed separately as endophytes and epiphytes. The taxonomic composition determined by performing sequencing of the V5-V6 region of the 16S rRNA gene indicated differences among populations of the leaf phyllosphere, the necromass, and the rhizosphere, with predominance of some phyla but only few shared operational taxonomic units (OTUs). Functional profiles predicted on the basis of taxonomic affiliations differed from those obtained by GeoChip microarray analysis, which separated community functional capacities based on plant microenvironment. The identified metabolic pathways provided insight regarding microbial strategies for colonization and survival in these ecosystems. This study of novel plant phyllosphere microbiomes and their putative functional ecology is also the first step for future bioprospecting studies in search of enzymes, compounds, or microorganisms relevant to industry or for remediation efforts.A ndean high-mountain environments have been reported as diversity hot spots, mainly because of their endemic species (1). The Paramos ecosystems within the Neotropical Andes consist of isolated, high-elevation areas that are reported to be the world's fastest-evolving biodiversity hot spot (2). These ecosystems are exposed to harsh environmental conditions, such as high incidence of UV radiation (3) and daily shifts in temperatures that impose selective pressure on native plants and their associated microbiota (4). In particular, the phyllosphere of endemic plants from Paramos represents a unique ecosystem for microbial communities with diverse and distinctive abilities to survive under conditions considered extreme for other forms of life.The phyllosphere refers to all aboveground surfaces of any plant, including leaves, stems, buds, flowers, and fruits (5). It acts as a landing stage where spores or other propagules can develop and multiply (6) and has been reported as probably the largest ecosystem on earth colonized by microorganisms, mainly bacteria and fungi (7). Interest in studying the phyllosphere microbiota is growing due to its potential in terms of microbial interactions, survival under harsh environmental, nutrient or humidity conditions, and bioprospecting. The most emblematic plant in the Colombian Paramos is known as "frailejón," a plant endemic to the region and belonging to the genus Espeletia (8, 9). These plants have unique adaptations that enable them to resist exposure to UV light and daily temperature changes; they are in close ...

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Section: Figmentioning

confidence: 99%

Microbial and Functional Diversity within the Phyllosphere of Espeletia Species in an Andean High-Mountain Ecosystem

Ruiz-Pérez

Restrepo

Zambrano

2016

Appl Environ Microbiol

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“…The oil was also relatively rich (5.3%) in 19-oxo-entkaur-16-ene, which was reported by Bohlmann et al [4] as one of the components from the flower stems of Espeletiopsis guacharaca. On the other hand, α-pinene has been found in all the essential oils of Espeletiinae studied so far [5][6][7][8][9]. On the contrary, only 16 compounds (67.2%) were identified in the oil from the roots, with α-pinene (27.9%), β-pinene (10.9%), β-caryophyllene (10.2%), and bicyclogermacrene (8.6%) as major components.…”

Section: Npc Natural Product Communicationsmentioning

confidence: 89%

Composition and Antibacterial Screening of the Essential Oils of Leaves and Roots of Espeletiopsis Angustifolia Cuatrec

Meccia

Rojas

Velasco

et al. 2007

Natural Product Communications

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Hydrodistillation of leaves and roots of Espeletiopsis angustifolia Cuatrec. (Asteraceae) yielded 0.18% and 0.15% essential oils, respectively. GC-MS analysis allowed identification of 24 components, which made up 92.9% of the total oil from the leaves, while only 16 compounds (67.2%) were identified in the roots. The most abundant compounds in the leaves were α-pinene (29.9%), β-caryophyllene (14.1%), α-gurjunene (9.9%), β-pinene (9.6%), and 19-oxo-ent-kaur-16-ene (5.3%). In the roots, the main ones were α-pinene (27.9%), β-pinene (10.9%), β-caryophyllene (10.2%), and bicyclogermacrene (8.6%). Antibacterial activity was tested against Gram-positive and Gram-negative bacteria using the agar diffusion method. Activity was observed only against Gram-positive bacteria. MIC values were determined for Staphyloccocus aureus ATCC 25923 (1000 μg/mL, both roots and leaves) and Enteroccocus faecalis ATCC 29212 (240 μg/mL, roots and 360 μg/ mL, leaves).

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“…The oil of E. semiglobulata is very rich in α-thujene, 6 while the oil of E. batata contains 35.4% α-pinene and only 12.5% α-thujene. 7 On the other hand, in the oil of E. weddellii p-cymene (20%) and α-phellandrene (17.6%) are the main constituents. 8 Since E. schultzii is so widely distributed, it was decided to study the essential oil composition from plants at three different locations.…”

Section: Introductionmentioning

confidence: 99%

The essential oil ofEspeletia schultzii of different altitudinal populations

Ibañez

Usubillaga

2006

Flavour Fragr. J.

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Espeletia schultzii (Asteraceae) is a widely distributed polycarpic caulirosette with densely hairly leaves that grows at 2600-4200 m altitude in the Venezuelan Andes. The essential oil of plants collected at different vegetative stages at three different paramos was obtained by hydrodistillation. Analyses were carried out on a GC and GC-MS system. Monoterpene hydrocarbons constituted the most abundant fraction (80.0-93.8%), while oxygenated monoterpenes and sesquiterpenes occurred in small proportions. The most abundant constituents were α α α α α-pinene, α α α α α-phellandrene and myrcene. α α α α α-Thujene, which was the fourth most abundant constituent at La Culata and Los Osos (7.1-16.7%), was found in small quantities in plants collected at Pico del Aguila (0.1-2.1%). No significant differences in composition were observed in oils from plants collected at different blooming stages but differences in composition were evident in oils from plants collected at different paramos. This implies that altitude could be a factor influencing the chemistry of the plant. Association analysis showed chemical variation in the essential oil from the three different sites.

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Essential Oil of the Leaves fromEspeletia batataCuatrec

Cited by 9 publications

References 3 publications

Microbial and Functional Diversity within the Phyllosphere of Espeletia Species in an Andean High-Mountain Ecosystem

Microbial and Functional Diversity within the Phyllosphere of Espeletia Species in an Andean High-Mountain Ecosystem

Composition and Antibacterial Screening of the Essential Oils of Leaves and Roots of Espeletiopsis Angustifolia Cuatrec

The essential oil ofEspeletia schultzii of different altitudinal populations

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