A5017630461- Botany, Ecology, and Taxonomy Studies
- Scarabaeidae Beetle Taxonomy and Biogeography
- Botanical Research and Applications
- Forest ecology and management
- Archaeology and Natural History
- Plant Diversity and Evolution
- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Plant Taxonomy and Phylogenetics
- Rangeland and Wildlife Management
- Botany and Plant Ecology Studies
- Mediterranean and Iberian flora and fauna
- Plant and soil sciences
- Plant Pathogens and Fungal Diseases
- Plant Parasitism and Resistance
- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Essential Oils and Antimicrobial Activity
- Genetic diversity and population structure
- Botany and Geology in Latin America and Caribbean
- Phytochemicals and Antioxidant Activities
- Fern and Epiphyte Biology
- Plant Ecology and Soil Science
- Seed and Plant Biochemistry
- Forest Ecology and Biodiversity Studies
Instituto Politécnico Nacional
2016-2025
Durango Institute of Technology
2005-2024
Centro de Investigación y Desarrollo
1996-2016
Yahoo (United Kingdom)
2008
Instituto de Fisiología Vegetal
2000-2002
Summary The tree of life is highly reticulate, with the history population divergence emerging from populations gene phylogenies that reflect histories introgression, lineage sorting and divergence. In this study, we investigate global patterns oak diversity test hypothesis there are regions genome broadly informative about phylogeny. We utilize fossil data restriction‐site associated DNA sequencing ( RAD ‐seq) for 632 individuals representing nearly 250 Quercus species to infer a...
La Sierra Madre Occidental (SMO) es el complejo montañoso más grande de México, extendiéndose por casi 1200 km desde noreste Sonora (30°35' N) hasta norte Jalisco (21°00' N). A pesar su gran importancia ambiental y económica, todavía deficientemente conocida. Se presenta una sinopsis los tipos vegetación, con datos sobre la superficie que ocupan las comunidades reconocidas, intervalos elevación climas donde se localizan, así como un mapa. En zona confluyen tres regiones, albergando...
Fruits of wild species the genus Physalis are consumed as food and calyces leaves used in traditional medicine. The phenolic composition this have been scarcely studied. To contribute to a better knowledge for use all potential these plants, leaves, fruits, five were analyzed their antioxidant properties.Important tissue- species-dependent variations found. Calyces subulata showed highest contents phenolics (176.58 mg gallic acid equivalents/g dry tissue), flavonoids (39.63 mg/g acids (50.57...
Abstract Interactions between extrinsic factors, such as disruptive selection and intrinsic genetic incompatibilities among loci, often contribute to the maintenance of species boundaries. The relative roles these factors in establishment reproductive isolation can be examined using pairs characterized by gene flow throughout their divergence history. We investigated process speciation boundaries Pinus strobiformis flexilis . Utilizing ecological niche modelling, demographic modelling...
Dissimilarity in community composition is one of the most fundamental and conspicuous features by which different forest ecosystems may be distinguished. Traditional estimates dissimilarity are based on differences species incidence or abundance (e.g. Jaccard, Sørensen, Bray-Curtis indices). However, not only affected abundance, but also biological heterogeneities among species. The objective this study to present a new measure involving heterogeneity "discriminating Avalanche" introduced...
ABSTRACT Aim We addressed the role of climate and historical biogeography on temperate‐tropical divide in Mexico, also known as “Mexican Transition Zone” (MTZ). asked: (1) How phylogenetic structure species composition vary across MTZ, (2) What roles dispersal, situ speciation climatic filtering play assembling regional floras, (3) biogeographic events interact to maintain distinct floristic communities transition zone. Location Mexico. Time Period Present day. Major Taxa Studied Vascular...
The antioxidant properties and the flavonoid composition of extracts different hydrophobicity prepared from entire edible flowers Agave durangensis were evaluated. Separately, total tepals anthers–pollen analyzed in same manner. high performance liquid chromatography with photodiode array detection (HPLC–DAD) analysis revealed a eight flavonols (five quercetin glycosides three kaempferol glycosides), varying number concentration extracts. showed highest content (1210.4 µg/g dry extract) most...
An important challenge for silvicultural practices is the conservation of tree diversity while fulfilling traditional objectives forest management, most notably timber harvesting. The purpose this study was to compare before and after application treatments in a temperate northern Mexico. Fifteen experimental plots, each measuring 2500 m2, were established evaluate immediate effect four treatments. These identified by their levels management: intensive (clearcut, removal 100%),...
Summary González‐Elizondo, M. S. & Peterson, P. M.: A classification of and key to the supraspecific taxa in Eleocharis (Cyperaceae) . – Taxon 46: 433–449. 1997. ISSN 0040‐0262. comparison former classifications is made a new, revised system proposed for Four subgenera, seven sections, eight series, subseries are recognized. subgenera sections included along with type citations, synonymies, representative species. Two new E. ser. Albidae Rostellatae , described, one combination, sect....
Un elemento clave para favorecer un manejo forestal sustentable es conocer las compensaciones, sinergias y relaciones de los servicios ecosistémicos generados por bosques. Este estudio tuvo como objetivo describir la relación entre el algunos ecosistémicos, en particular conservación diversidad vegetal, producción madera, regulación flujos del agua secuestro almacenamiento carbono bosques templados México. Se revisaron varias bases datos bibliográficos encontrar estudios más relacionados con...
Hybridization is an important evolutionary force, because interspecific gene transfer can introduce more new genetic material than directly generated by mutations. Pinus engelmannii Carr. one of the nine most common pine species in pine-oak forest ecoregion state Durango, Mexico. This widely harvested for lumber and also used reforestation programmes. Interspecific hybrids between P.engelmannii arizonica Engelm. have been detected morphological analysis. The presence P. seed stands may...
Natural forest regeneration, i.e. self-renewal of stands, involves the replacement old trees by next generation and is influenced environmental factors. The spatial structure tree regeneration depends on also influences properties stands themselves. Few studies have investigated patterns naturally regenerated areas in Mexican pine–oak forests, which are considered one world's top 34 biodiversity hotspots. In this study, we analyzed patterns, particularly structure, clusters seven 100 × m...
Abstract Phytoremediation is an emergent field of great potential for the removal metals, metalloids and other contaminants from soil, water sediments. The use native plants with high tolerance capacity to accumulate metal be removed a very convenient approach. High levels arsenic (As) have been found at several natural sources in northern arid semi‐arid regions Mexico. state Chihuahua is, among others, one which As has detected drinking water. aim present work was identify indigenous...
La reserva de la biosfera Michilía se localiza al SE del estado Durango, en una zona con clima templado semiseco. Cuenta superficie aproximada 70,000 ha, las cuales 7,000 corresponden a núcleo, el Cerro Blanco. Su vegetación es representativa que extiende través millones hectáreas, especialmente vertiente oriental Sierra Madre Occidental México, entre los 2000 y 3000 m altitud. e llevó cabo delimitación cartografía comunidades vegetales área un mapa escala 1:50,000. distribución altitudinal...
Eleocharis subarticulata is recorded as the third species of Cyperaceae with a reduced chromosome number (n = 3), following reports on Rhynchospora tenuis 2) and Fimbristylis umbellaris 3). For Eleocharis, numbers to date vary from 2n 10 c. 196, x 5 possible basic number. The karyotype E. was studied using conventional staining (mitosis meiosis), C-CMA3/DAPI banding, FISH 45S rDNA telomere probes. chromosomes showed no primary constrictions, expected in holocentric Cyperaceae. meiotic...
Long terminal repeat-retrotransposons (LTR-RTs) comprise a large portion of plant genomes, with massive repeat blocks distributed across the chromosomes. Eleocharis species have holocentric chromosomes, and show positive correlation between chromosome numbers amount nuclear DNA. To evaluate role LTR-RTs in karyotype diversity members (subgenus Eleocharis), occurrence location different Copia Gypsy superfamilies were compared, covering interspecific variations ploidy levels (considering...
Chromosome numbers in Cyperaceae lower than the typical basic number x<i> = </i>5 have been described for only three species: <i>Rhynchospora tenuis </i>(n 2), <i>Fimbristylis umbellaris 3) and <i>Eleocharis subarticulata 3). maculosa </i>is recorded here as fourth species of that has a chromosome 2n 10, with 8, 7 6. The karyotype differentiation <i>E. </i>was studied using conventional staining (mitosis meiosis), FISH 45S 5S rDNA...
The foliar phenol profiles of eight populations the Agave victoriae-reginae complex were determined by high performance liquid chromatography with diode array detection in order to assess variability those compounds across natural distribution complex, and determine their taxonomical significance. With comparative aims lechuguilla A. striata analyzed same manner. A total 81 phenolic detected, comprising 18 acids, 51 flavonoids (26 flavonols, 19 dihydrovonoids, six flavones), 12 non...
Antecedentes: El conocimiento taxonómico y florístico de las plantas vasculares del norte México presenta avances relevantes, aunque disgregados. Por lo anterior, es crítico hacer un diagnóstico para definir estrategias que los unifiquen complementen. Preguntas: ¿cuál la riqueza endemismo en el México?, ¿en cuáles sus áreas deben concentrarse esfuerzos exploración? Sitio estudio: (Chihuahua, Coahuila, Durango Nuevo León). Métodos: Se desarrolló una base datos a partir Herbario CIIDIR,...
The antioxidant properties and the foliar phenol composition of 25 Mexican varieties Phaseolus vulgaris L. (common bean) were evaluated. coccineus was analysed with comparative aims. high performance liquid chromatography photodiode array detection analysis revealed 27 phenolics in leaves P. (13 quercetin-3-O-glycosides, 8 kaempferol-3-O-glycosides, 2 myricetin glycosides 4 phenolic acids) 5 (2 kaempferol-3-O-glycoside, apigenin-7-O-glycoside 1 luteolin-7-O-glycoside). All extracts showed...
The Sierra Madre Occidental in the Mexican State of Durango, is home to about 5 million ha species-rich forest ecosystems. Local communities depend on these forests for their livelihood. preservation species richness and productivity this unique resource requires improved understanding effects structure density production. community was analysed three groups (all species; 12 Pinus; 16 Quercus). Based data gathered 580 remeasured observational field plots, main results study were as follows:...