A5001969026- Fern and Epiphyte Biology
- Plant Diversity and Evolution
- Plant and animal studies
- Plant Taxonomy and Phylogenetics
- Botany, Ecology, and Taxonomy Studies
- Mediterranean and Iberian flora and fauna
- Plant Parasitism and Resistance
- Plant Toxicity and Pharmacological Properties
- Plant Pathogens and Fungal Diseases
- Lichen and fungal ecology
- Botanical Research and Applications
- Botanical Research and Chemistry
- Plant and fungal interactions
- Scarabaeidae Beetle Taxonomy and Biogeography
- Plant Physiology and Cultivation Studies
- Animal Ecology and Behavior Studies
- Botany and Plant Ecology Studies
- Mycorrhizal Fungi and Plant Interactions
- Bioactive Compounds and Antitumor Agents
- Biocrusts and Microbial Ecology
- Environmental and Ecological Studies
- Plant and soil sciences
- Turfgrass Adaptation and Management
- Phytochemistry and Bioactive Compounds
- Polyamine Metabolism and Applications
National University of Salta
2015-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2013-2024
Instituto de Geociencias
2020
Direção Geral do Território
2016
Instituto de Botânica
2013
Seasonally dry tropical forests are distributed across Latin America and the Caribbean highly threatened, with less than 10% of their original extent remaining in many countries. Using 835 inventories covering 4660 species woody plants, we show marked floristic turnover among regions, which may be higher other neotropical biomes, such as savanna. Such high indicates that numerous conservation areas countries will needed to protect full diversity forests. Our results provide a scientific...
The presence of Anadenanthera colubrina var. for the Argentinean flora is confirmed. This variety distinguished by three morphological characters: structure inflorescence, fruit characteristics and venation type folioles, being latter very useful when studying vegetative material. inhabits same areas as cebil. A distribution map, illustrations a key to identify varieties are presented, lectotypes designated Piptadenia macrocarpa Niopa.
The occurrence of helical cell wall thickenings in fern roots is not well investigated and there are few records about it the literature. To assess presence their chemical composition, we studied all species Polypodiaceae, which grow northwestern Argentina, using light microscopy, scanning electron fluorescence microscopy. Twenty twenty-one showed thickening roots. Only Melpomene peruviana absent. All have cellulose as main compound. structure may be classified simple, furcate, or...
Abstract Spore morphology in the Pteris cretica complex, including brasiliensis, P. ciliaris, cretica, denticulata var. denticulata, tristicula, ensiformis, multifida and mutilata was examined using light scanning electron microscope. The spores are trilete, triangular to circular shape, with an equatorial thickening (= cingulum). Equatorial diameter ranges from 29 69 μm, polar 18 53 μm. Exospore is proximally verrucate distally rugate, exception of which has cones on both faces. Perispore...
Doryopteris triphylla (Pteridaceae-Cheilanthoideae) grows in xeric habitats Brazil, Paraguay, Uruguay and Argentina. The aim of this study was to characterize D. anatomically, histochemically cytogenetically. For anatomical characterization, rhizomes, roots, petioles leaves were made then stained using Safranine-Astra Blue for further observations. Leaf blades also cleared. histochemical analysis, leaf cross sections with different reagents identify glandular trichomes compounds. cytogenetic...
We studied the petiole structure of twelve American species Pteris P. ciliaris, cretica, deflexa, denticulata, ensiformis, exigua, inermis, multifida, mutilata, quadriaurita, tristicula and vittata, using both light scanning electron microscopy. found that petioles are characterized externally by presence an adaxial groove two dorsal-lateral ventilation areas. Internally, monostelic V-, U- or inverted-Ω-shaped axes. The vascular system is surrounded one endodermis cell layer 1–3 pericycle...
El género pantropical Pteris L. tiene 250 especies de la cuales 60 están en el continente Americano. Se estudió morfogénesis los gametófitos, y morfología esporófitos jóvenes cuatro especies: P. cretica, ensiformis, multifida P.vittata, junto con un análisis palinológico que incluye capacidad las esporas germinar. Los gametófitos se obtuvieron mediante técnicas cultivo in vitro. trasladaron a sustrato estéril tierra arena (3:1). usó microscopio luz barrido (SEM). encontraron diferentes tipos...
Martínez, O. G. (2011). Morphology and distribution of the complex Pteris cretica L. (Pteridaceace) for American continent. Candollea 66: 159–180. In Spanish, English French abstracts.The (Pteridaceae) taxonomical is revised It composed by seven species: ciliaris D. C. Eaton, L., denticulata Sw., ensiformis Burm. f., multifida Poir., mutilata tristicula Raddi. Morphological characters have been identified in order to distinguish members group. An identification key proposed a diagnostic...
ABSTRACT Argyrochosma nivea var. tenera is a cheilanthoid fern from the American continent. We present herewith study of meiotic behavior and gametic number as well spores reproduction mode (with observations cultured gametophytes). The material Northwestern Argentina. For meiosis, sporangia were fixed in ethanol-acetic acid (3:1) stained with 2% propionic haematoxylin. Micrographs taken using light scanning electron microscopes. Meiotic chromosome 2n = 3x 81 presence lagging chromosomes at...
RESUMENSe presenta el desarrollo protálico de Pteris inermis (Rosenst.)de la Sota, estudiado mediante técnicas cultivo in vitro.La germinación esporas recientemente recolectadas comienza a los 6 días, y 27 días las que fueron almacenadas durante un año.La es tipo Vittaria.El tratamiento con reguladores crecimiento, Giberelina Benziladenina (BA), reduce tiempo germinación, especialmente 0,5 ppm/L Giberelina.Durante fase filamentosa se forman ramificaciones originan colonias en etapa adulta.El...
This paper describes Pteris sotae, a new endemic fern species from the Tucuman–Bolivian Forest in northwestern Argentina. is easily distinguished by its hairy laminae and areolate venation. A distribution map photographs are provided.
Campyloneurum angustifolium (Sw.) Fée (Polypodiaceae) es un nuevo registro para Argentina. Se presenta una descripción de la especie e ilustraciones planta, así como mapa y clave las especies que crecen en el noroeste argentino.