A5090369049- Plant Taxonomy and Phylogenetics
- Plant Diversity and Evolution
- Botany, Ecology, and Taxonomy Studies
- Plant and animal studies
- Genetic diversity and population structure
- Chemical synthesis and alkaloids
- Botanical Research and Applications
- Lichen and fungal ecology
- Fern and Epiphyte Biology
- Mediterranean and Iberian flora and fauna
- Marine and coastal plant biology
- Species Distribution and Climate Change
- Biological Control of Invasive Species
- Plant Physiology and Cultivation Studies
- Botany and Plant Ecology Studies
- Sesquiterpenes and Asteraceae Studies
- Flowering Plant Growth and Cultivation
- Berry genetics and cultivation research
- Heavy Metals in Plants
- Algal biology and biofuel production
- Heavy metals in environment
- Botany and Geology in Latin America and Caribbean
- Plant chemical constituents analysis
- Cultural and Social Studies in Latin America
- Environmental and Ecological Studies
University of Talca
2012-2023
Institut des Sciences Biologiques
2023
Universidad Católica del Norte
2010-2017
Planta
2007
Adaptive radiation is a common mode of speciation among plants endemic to oceanic islands. This pattern one cladogenesis, or splitting the founder population, into diverse lineages in divergent habitats. In contrast, species have also evolved primarily by simple transformations from progenitors source regions. anagenesis, whereby founding population changes genetically and morphologically over time through mutation recombination. Gene flow populations maintained homogeneous environment with...
Abstract The aim of this work was to evaluate the utility A zolla filiculoides growing in a hydroponic system for phytoremediation continental water polluted with cadmium and copper during 7 days exposure. Cadmium chloride were added medium at concentrations 0.5–10 mg/ L 0.1–25 , respectively. levels measured each plant using flame atomic absorption spectrophotometry. analytical methodology used measure validated standard reference material ( SRM ) – 1570 (spinach) National Institute...
This study analyses and compares the genetic signatures of anagenetic cladogenetic speciation in six species genus Robinsonia (Asteraceae, Senecioneae), endemic to Juan Fernández Islands, Chile. Population structure was analyzed by amplified fragment length polymorphism (AFLP) microsatellite (simple sequence repeat, SSR) markers from 286 320 individuals, respectively, 28 populations. Each is genetically distinct. Previous hypotheses classification among these into subgenera sections, via...
A common mode of speciation in oceanic islands is by anagenesis, wherein an immigrant arrives and through time transforms mutation, recombination, drift into a morphologically genetically distinct species, with the new species accumulating high level genetic diversity. We investigate Drimys confertifolia, endemic to two major Juan Fernández Archipelago, Chile, determine consequences examine relationships among populations D. confertifolia continental winteri andina, test probable migration...
Anagenesis (or phyletic evolution) is one mode of speciation that occurs in the evolution plants on oceanic islands. Of two endemic species Juan Fernández Islands (Chile), Myrceugenia fernandeziana and M. schulzei (Myrtaceae), believed to have originated anagenetically from different continental progenitors, first Robinson Crusoe Island has no clear tie relatives; last younger island, Alejandro Selkirk Island, close affinity colchaguensis mainland Chile.Using AFLPs six nuclear...
We analyzed the vegetation of Alejandro Selkirk Island using Zürich-Montpellier approach for taking relevés and subsequent classification by a multivariate manual refinement. The resulting table demonstrates patterns dominance variation units that were mapped onto aerial photographs to produce map. Additional observations several inaccessible sectors gained from photos taken during boat trip around island. These results are combined in colored map shows following units: (1) Dicksonia externa...
Abstract Radiation into different environments is a common evolutionary phenomenon in plants. This process has been extensively documented oceanic islands and to lesser extent continental areas. The genus Hypochaeris (Asteraceae: Cichorieae) contains 41 species South America that have evolved during the past one million years. Dispersal of propagules new regions followed by speciation at diploid level ecological zones resulted radiated groups. One such group, H. apargioides complex, consists...
Abstract Oceanic islands provide many opportunities for examining modes of speciation in endemic plants, especially using modern molecular methods. Most has been by either cladogenesis, usually resulting radiated complexes, or anagenesis, yielding single transformed species. Previous genetic studies with available markers, representing a limited sampling the genome, have suggested that during species accrue small differences but differ dramatically morphology. An appropriate archipelago...
Ruiz et Pav.Este género incluiría a todas aquellas especies tratadas frecuentemente por los agrostólogos sudamericanos dentro de Stipa L. s.l.cuyos antecios presentan rasgos morfológicos asociados una anemocoría especializada (Stipa subgen.Jarava, subgen.Ptilostipa y subgen.Pappostipa).La presencia pelos largos en el ápice la lema formando un pappus, o bien, aristas plumosas paposas, se interpretan como novedades evolutivas, es decir, caracteres avanzados dispersión las diásporas...
Gomortega keule (Molina) Baillon is a rare Chilean species classified as endangered and currently under conservation. Currently, conservation of this carried out by private companies government agencies, but done so based more on pragmatic criteria than scientifically strategies. In context, information concerning the genetic variability among different populations over its entire distribution range incomplete, making it difficult to coordinate management Here we report study evaluate...
RESUMENLa taxonomía de los géneros chilenos Amaryllidaceae es confusa, persistiendo problemas taxonómicos tanto a nivel como especies.Actualmente existe controversia acerca la correcta clasifi cación especies hasta ahora asignadas Rhodophiala C.Presl.A través del estudio aspectos morfológicos, recientemente se ha sugerido rehabilitación género Rhodolirium Phil., donde montanum Phil.es considerada especie tipo.Esta sido denominada rhodolirion (Baker) Traub en las caciones tradicionales
The aim of the present investigation was to appraise variation in chemical composition and antimicrobial activity against phytopatogenic bacterial essential oils from Azorella spinosa.Three samples A. spinosa were collected different date same area.The obtained for hydrodestillation using a Clevenger-type apparatus.The analysed Gas chromatography-mass spectrometry showed yield composition, main detected compounds monoterpenes such as limonene (10.66-12.30%),tricyclene (10.81-16.99%)and...
This study evaluated the capacity of Azolla filiculoides to enhance heavy metal accumulation through addition different concentrations cadmium (Cd) and copper (Cu), as ethylenediaminetetraacetic acid (EDTA) complexes, under hydroponic conditions. The physiological effect was determined by Photosynthetic efficiency (Fv/Fm) an indicator plant stress, content measured with flame atomic absorption spectroscopy in whole plants. results obtained rhizofiltration systems did not show increase when...
Chilean geophytes are distributed throughout the country, between Arica (18°29’ South latitude) and Tierra del Fuego (54°20’ latitude). However, greatest diversity is concentrated in central part of which has a Mediterranean climate. There about 40 genera, and, depending on species, they have great potential either as garden plants or cut flowers. A 4-year study was conducted to test different methods both sexual vegetative propagation 19 species: Alstroemeria pseudospathulata, Bomarea...
El cultivo ex situ de Pteris chilensis Desv. a partir esporas es presentado. La germinacion las ocurre los 10-12 dias y el patron del tipo Vittaria. Un gametofito filamentoso 3-4 celulas obtenido 23-24 dias, logrando su desarrollo adulto entre 60 95 dias. Este se caracteriza por ser cordiforme con alas simetricas. Los arquegonios forman antes que anteridios. Finalmente, la primera fronde aparece 115 sembradas esporas. Las cultivaron en agar medio nutritivo Thompson, camara un fotoperiodo 12...
The genus R haphithamnus ( V erbenaceae) consists of two species, one in S outh A merica and another endemic to the J uan F ernández archipelago, C hile. represents an example anagenetic speciation which island populations have diverged from their colonizing ancestors point where they are recognized as a distinct species. species venustus differs continental . spinosus primarily by floral traits associated with adaptation hummingbird pollination. Two molecular markers, amplified fragment...
Effect of bulb weight on growth and fl owering Herbertia
Abstract Oceanic islands are vulnerable ecosystems and their flora has been under pressure since the arrival of first humans. Human activities both deliberately inadvertently introduced biota have had continue to a severe impact on island endemic plants. The number alien plants increased nearly linearly many islands, perhaps resulting in extinction‐based saturation floras. Here, we provide evidence for such scenario Alejandro Selkirk, Robinson Crusoe Islands (Archipelago Juan Fernández,...
Se entregan números cromosómicos de 19 especies la flora vascular Chile, obtenidos raíces provenientes semillas germinadas en placas Petri o material recolectado terreno creciendo maceteros invernadero. Nuevos registros citológicos para Chile son: Alstroemeria magnifica Herbert subsp. magenta (Bayer) M. Muñoz (2n = 16), Astragalus looseri I.M. Johnst. 22), Centaurea melitensis L. 24), solstitialis Erigeron andicola DC. 36), Montiopsis potentilloides (Barnéoud) D.I. Ford 20), Persea lingue...