A5078565401- Plant and animal studies
- Plant Diversity and Evolution
- Plant Taxonomy and Phylogenetics
- Chemical synthesis and alkaloids
- Botanical Research and Applications
- Plant Parasitism and Resistance
- Botany, Ecology, and Taxonomy Studies
- Ecology and Vegetation Dynamics Studies
- Mediterranean and Iberian flora and fauna
- Plant and Fungal Species Descriptions
- Cholinesterase and Neurodegenerative Diseases
- Plant Reproductive Biology
- Wildlife Ecology and Conservation
- Avian ecology and behavior
- Chromosomal and Genetic Variations
- Alkaloids: synthesis and pharmacology
- Botanical Research and Chemistry
- Agroforestry and silvopastoral systems
- Wildlife-Road Interactions and Conservation
- Fern and Epiphyte Biology
- African Botany and Ecology Studies
- Psychedelics and Drug Studies
- Agriculture and Rural Development Research
- Botanical Studies and Applications
- Ethnobotanical and Medicinal Plants Studies
National University of San Luis
2022-2023
University of Buenos Aires
2002-2017
The assemblages of visitors to angiosperms flowering at a montane and high alpine site in the Andes Mendoza, Argentina (33–34°S) were described plant-flower visitor matrices analyzed compared other systems, particular those located similar latitude on western slope Andes. In low-altitude (montane) habitat, 23 plant species had total 126 interactions with 71 taxa insects one hummingbird, higher 21 plants 45 insect 83 interactions. Connectances 7.6 8.7, respectively. Diptera Hymenoptera...
The Amaryllidaceae family is well known for its pharmacologically active alkaloids. An important approach to treat Alzheimer’s disease involves the inhibition of enzyme acetylcholinesterase (AChE). Galanthamine, an alkaloid, effective, selective, reversible, and competitive AchE inhibitor. This work was aimed at studying alkaloid composition four wild Argentinian Amarillydaceae species first time, as analyzing their inhibitory activity on acetylcholinesterase. Alkaloid content characterized...
Two new alkaloids, 4-O-methylnangustine (1) and 7-hydroxyclivonine (2) (montanine homolycorine types, respectively), four known alkaloids were isolated from the bulbs of Hippeastrum argentinum, their cholinesterase-inhibitory activities evaluated. These compounds identified using GC-MS, structures defined by physical data analysis. Compound 2 showed weak butyrylcholinesterase (BuChE)-inhibitory activity, with a half-maximal inhibitory concentration (IC50) value 67.3 ± 0.09 μM. To better...
Natural flooding is one of the major factors affecting vegetation dynamics in many regions world. The Flooding Pampa Grasslands (Argentina) are frequently exposed to events diverse intensity and duration, some which Leontodon taraxacoides , an exotic dicot. frequent these grasslands, seems survive. Its responses four different water depths (0, 1, 7 13 cm) were studied. results indicate that plants conditions total submergence (depth did not In less severe flood conditions, increases leaf...
The assemblages of visitors to angiosperms flowering at a montane and high alpine site in the Andes Mendoza, Argentina (33–34°S) were described plant-flower visitor matrices analyzed compared other systems, particular those located similar latitude on western slope Andes. In low-altitude (montane) habitat, 23 plant species had total 126 interactions with 71 taxa insects one hummingbird, higher 21 plants 45 insect 83 interactions. Connectances 7.6 8.7, respectively. Diptera Hymenoptera...
Chagas disease, caused by the parasite Trypanosoma cruzi, affects over six million people worldwide, mainly in Latin American countries. Currently available drugs have variable efficacy chronic phase and significant side effects, so there is an urgent need for safer chemotherapeutic treatments. Natural products provide privileged structures that could serve as templates synthesis of new drugs. Among them, Amaryllidaceae plants proved to be a potential natural source therapeutical agents due...
Background: Hippeastrum species have a wide range of biological properties. In Argentina, this genus comprises ten widely distributed species. Purpose: To evaluate the antiparasitic and anticholinesterase activities chemical profiles seven Argentinean determine synergism between major isolated alkaloid—montanine—and benznidazole in anti-Trypanosoma cruzi activity. Methods: The activity was evaluated through antiproliferative viability assays against T. epimastigotes. Synergism were performed...
ABSTRACT Myrrhinium atropurpureum has unusual floral characteristics: sweet, juicy petals, long vivid stamens, and absence of nectar odor. This uncommon syndrome is morphologically anatomically described. Floral phenology also described, censuses flower visitors are provided. The main pollinators frugivorous passerine birds, which attracted by the petals. type reward vev seems to be restricted, in South America, Myrrhinium, Feijoa (Myrtaceae) Calceolaria (Scrophulariaceae). possible origin...
Campos del Tuyú National Park, located at the southern part of Samborombón Bay, is a protected area created to promote recovery an endangered species, pampas deer (Ozotoceros bezoarticus celer). Previous studies suggest that protection related availability and nutritive value forage provided byCeltis tala Spartina densiflora communities, both preferred as feeding habitat. With aim enhace offer for pampa deer, specific management practices were designed: a) high intensity biomass defoliation...
Abstract — Conventional Feulgen staining, CMA/DAPI banding and FISH with 18–5.8–26S rDNA probe were used to determine chromosome numbers, karyotypes physical position of GC or AT rich heterochromatin sites in three South American species Herbertia: H. lahue subsp. amoena, quareimana, darwinii. The basic number the genus is × = 7, but analyzed taxa have different ploidy levels. was 2n 14 for darwinii 28 quareimana. two populations studied amoena did result in: 42 (Gualeguaychu) 56 (Palma de...
The monotypic genus Tamia was described by Ravenna in 2001 based on specimens of Calydorea pallens from Bolivia and West-Central Argentina (excluding Córdoba San Luis). At the same time, undulata as a new species to accommodate excluded specimens. He used floral morphology segregate . having anthers twisted/circinate after dehiscence, whereas , are straight. Similarly, upper third anther is adnate style arms while free branches. We here evaluate validity C. morphological cytological...
Three Hypochoeris species from Argentina with the same chromosome number (x = 4) and similar karyotypes (typically bimodal) show significant ecological morphological differences. Comparative cytogenetic analysis was done for these taxa, producing correlated idiograms. The of secondary constrictions nucleolar organizers varied. results this study are discussed in terms mechanisms microevolution within group closely related species, evolutionary trend genus tribe Cichorieae. Key words:...
A new species of Habranthus Herbert (Amaryllidaceae) is described and illustrated. sanavirone Roitman, J. A. Castillo, G. Tourn & Uria found in sandy soils central Argentina. The resembles H. robustus size but can be easily distinguished by the absence bulblets, its glaucous leaves, recurved light yellow tepals, with this feature not any other genus.
Romulea rosea (Iridaceae: Crocoideae), a species original of South Africa, is cited for the first time Chile. The described, and therefore Calydorea chilensis M.Munoz published recently, reduced to nomenclatural synonym.