A5081918145- Fern and Epiphyte Biology
- Plant Diversity and Evolution
- Plant and animal studies
- Plant Pathogens and Fungal Diseases
- Plant Taxonomy and Phylogenetics
- Lichen and fungal ecology
- Botany, Ecology, and Taxonomy Studies
- Mediterranean and Iberian flora and fauna
- Botany and Plant Ecology Studies
- Plant Parasitism and Resistance
- Plant and Fungal Species Descriptions
- Seed Germination and Physiology
- Marine and coastal plant biology
- Archaeology and Natural History
- Ecology and Vegetation Dynamics Studies
- Concrete Corrosion and Durability
- Phytochemistry and Biological Activities
- Plant nutrient uptake and metabolism
- Legume Nitrogen Fixing Symbiosis
- Mycorrhizal Fungi and Plant Interactions
- Structural Engineering and Vibration Analysis
- Psychological Treatments and Disorders
- Health Systems, Economic Evaluations, Quality of Life
- Diatoms and Algae Research
- Frailty in Older Adults
Universidad Nacional de La Plata
2015-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2010-2020
Instituto de Fisiología Vegetal
2006-2019
Comisión de Investigaciones Científicas
2016
Bernardino Rivadavia Natural Sciences Museum
2016
Centro Científico Tecnológico - Tucumán
2016
Missouri Botanical Garden
2008
Punta Lara Natural Reserve shelters the relict of Southernmost riparian forest in world, where flora is threatened by anthropic expansion and introduction exotic species. In this area ferns lycophytes grow particular environments as marshland, grassland marginal forest. The aim work was to evaluate diversity that inhabit Reserve. Field trips were conducted from 2006 2009 local herbaria specific bibliography also revised. As a result our study twenty four taxa recognized. Their habit mainly...
The genus Lygodium Sw. is one of the few climbing ferns in world. spores L. venustum and volubile were studied using light, scanning, transmission electron microscopy. This work based on herbarium material. are trilete, triangular, with straight to convex sides polar view. equatorial diameter 72-104 µm, 64-84 µm. ornamentation verrucate-tuberculate while volubile, it proximal face but a ridges distal face, where micro-ornamentation constituted by verrrucae tubercles observed. An ridge also...
The spores of the following genera Polypodiaceae growing in northwest Argentina were analyzed: Campyloneurum, Microgramma, Pecluma, Phlebodium, Pleopeltis and Polypodium. study involved analyses herbarium material using light microscopy scanning electron microscopy. are monolete, 40–90 μm major equatorial diameter, eliptic to oblong polar view plane concave-convex view. exospore ranges from 2–5 thick, is apparently double-layered, with a verrucate or tuberculate surface that usually...
Mega‐ and microspores of heterosporous Filicophyta (Azolla cristata Willd., A. filiculoides Lam., Marsilea ancylopoda Braun, M. mollis Rob & Fern. Salvinia minima Baker) that grow in north‐west Argentina were studied by stereo microscopy, light scanning electron microscopy transmission microscopy. The spores analyzed for the first time. mega‐ morphology sporoderm structure as well type microspore aggregation enable determination taxa at generic level, specific level Azolla. Both species...
La provincia biogeográfica de las Yungas es considerada por la UNESCO como una Reservas Biosfera. El Parque Nacional Calilegua uno los “core” estas Yungas, donde helechos y licofitas crecen en diferentes ambientes epifitos, terrestres o saxicolas. objetivo este trabajo dar a conocer que habitan el Calilegua, con fin contribuir información sobre biodiversidad aportar su conservación. estudio se realizó teniendo cuenta material colectado viajes campo zonas del Parque, durante meses diciembre...
Abstract The spore wall ultrastructure of Campyloneurum, Microgramma, Pecluma, Phlebodium, Pleopeltis and Serpocaulum (Polypodiaceae) from north-western Argentina has been studied using transmission electron microscopy (TEM). exospore is 0.4–3 μm thick, two-layered variously ornamented in all taxa. surface distinctive, but general the similar species studied. structural elements consist cavities inner part as well channels with a radial orientation at both sides laesura. Variation was...
Abstract Spore sculpture and wall structure of eight Cyathea (Cyatheaceae) species from southern South America were studied using light microscopy (LM), scanning electron (SEM) transmission (TEM) techniques. Two layers, i.e. an inner outer layer, observed in the perispore. The layer has two strata: stratum is attached to exospore composed rodlets tangentially oriented spore surface randomly intermixed; consists a three-dimensional network with either free or fused distal edges forming...
The family Hymenophyllaceae is represented in the study area by six species two genera, Hymenophyllum J. E. Smith and Trichomanes L. was based on herbarium material spores were studied under light microscope (LM), scanning electron (SEM) transmission (TEM). Both genera have trilete spores, 23 to 45 μm equatorial diameter, with an ornamentation of echinulae cones verrucae, gemmae granules Trichomanes. Mature a sporoderm composed perispore, exospore fibrillar endospore; 0.5 2.5 thick, compact...
The xylem in three arborescent species of Blechnum section Lomariocycas was studied detail using SEM, TEM, FT-IR spectroscopy and sugar composition analysis. overall structure root rhizome metaxylem tracheids similar the analyzed, characterized by mostly scalariform pitting these multifaceted cells. Pit membrane thickness porosity varied according to stage tracheid maturation. Approximately rounded deposits resembling vestures were observed outer pit apertures some tracheids. Under...
Salpichlaena J. Sm. (Blechnaceae) is a genus of climbing fern that grows in Central and South America. The number species recognized for this varies according to different authors from one four. goal work was provide systematic revision the order contribute knowledge biodiversity For purpose morphological, anatomical palynological characters were analyzed material geographical distribution Salpichlaena. Herbarium specimens treated standard techniques LM SEM studies. type original...
Morfología y ultraestructura de las esporas Schizaea fistulosa (Schizaeaceae) Chile. Se estudiaron Chile con microscopía óptica (MO), electrónica barrido (MEB) transmisión (MET). Las son monoletes elípticas en vista polar. El diámetro ecuatorial mayor es 71-85 µm el polar 54-61 µm. lesuras 50-60 longitud algunos casos están bifurcadas. La la esporodermis se describe por primera vez. exosporio sección posee dos capas verrucoso-tuberculado elementos aislados o fusionados formando lomos cortos....
El cultivo in vitro de esporas y los aspectos reproductivos del helecho anual Anogramma chaerophylla (Pteridaceae). pertenece a un género helechos con esporofitos anuales gametofitos potencialmente perennes. En el área estudio, la Reserva Natural Punta Lara, vegetación crece bajo estrés debido principalmente contaminación invasión especies exóticas. Como parte proyecto conservación que habitan en provincia Buenos Aires, objetivos trabajo fueron evaluar las condiciones para germinación...
The morphology and wall ultrastructure of megaspores microspores Isoetes sehnemii that grows in Brazil were analyzed as part the study Isoetaceae present Southern South America. observations performed with light, scanning transmission electron microscopes. are trilete, 350-450μm equatorial diameter. surface is reticulate. In section, sporoderm 100μm thick including ornamentation. composed a siliceous perispore, which consists short fused flatten, elements forming three-dimensional mesh....
Desarrollo del gametofito y conservación de Ctenitis submarginalis (Dryopteridaceae) en la provincia Buenos Aires, Argentina. Se estudió germinación las esporas el desarrollo Reserva Natural Punta Lara, Aires como contribución a especie ésta área protegida. Las colectadas poblaciones naturales fueron sembradas medio Dyer se produjo los seis días, con un porcentaje 88 % 15 días después siembra. La es tipo Vittaria Aspidium. El cordado, una profunda escotadura alas simétricas bien...
Introducción y objetivos: Las características externas e internas de los pecíolos brindan información útil para estudios taxonómicos en helechos. El objetivo este trabajo fue analizar caracteres diagnósticos del pecíolo las 37 especies Asplenium que crecen Argentina, contribuir a su identificación indagar sobre significado adaptativo.M&M: Se emplearon especímenes herbario material fresco. Los materiales se analizaron con microscopios estereoscópico óptico; el último caso muestras fueron...