A5065235976- Genomics and Phylogenetic Studies
- Microbial Community Ecology and Physiology
- Genetic diversity and population structure
- Plant and animal studies
- Botanical Research and Applications
- Ecology and Vegetation Dynamics Studies
- Plant Diversity and Evolution
- Advances in Cucurbitaceae Research
- Botany, Ecology, and Taxonomy Studies
- Genetic Mapping and Diversity in Plants and Animals
- Evolution and Genetic Dynamics
- Species Distribution and Climate Change
- Plant Pathogens and Fungal Diseases
- Genetic and phenotypic traits in livestock
- Wildlife Ecology and Conservation
- Bacteriophages and microbial interactions
- Protist diversity and phylogeny
- Plant Parasitism and Resistance
- Bat Biology and Ecology Studies
- Chromosomal and Genetic Variations
- Vibrio bacteria research studies
- Yersinia bacterium, plague, ectoparasites research
- Mycorrhizal Fungi and Plant Interactions
- Gut microbiota and health
- Cocoa and Sweet Potato Agronomy
Universidad Nacional Autónoma de México
2016-2025
Instituto de Ecología
2016-2025
Universidad Autónoma de la Ciudad de México
1994-2024
Instituto Antártico Chileno
2023
University of Toronto
2019-2020
Google (United States)
2016
Universidad de Sonora
2015
Smithsonian Institution
2015
Instituto Politécnico Nacional
2015
Sistema Nacional de Investigadores
2011
The world's oceans contain a complex mixture of micro-organisms that are for the most part, uncharacterized both genetically and biochemically. We report here metagenomic study marine planktonic microbiota in which surface (mostly marine) water samples were analyzed as part Sorcerer II Global Ocean Sampling expedition. These samples, collected across several-thousand km transect from North Atlantic through Panama Canal ending South Pacific yielded an extensive dataset consisting 7.7 million...
We present the results of two exploratory parsimony analyses DNA sequences from 475 and 499 species seed plants, respectively, representing all major taxonomic groups.The data are exclusively chloroplast gene rbcL, which codes for large subunit ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO or RuBPCase).We used different state-transformation assumptions resulting in sets cladograms: (i) equal-weighting 499-taxon analysis; (ii) a procedure that differentially weights transversions...
Summary Succulent plants are widely distributed, reaching their highest diversity in arid and semi‐arid regions. Their origin diversification is thought to be associated with a global expansion of aridity. We test this hypothesis by investigating the tempo pattern Cactaceae diversification. Our results contribute understanding evolution New World Biomes. use most taxonomically complete dataset currently available for Cactaceae. estimate divergence times utilize Bayesian maximum likelihood...
The Agave (Agavaceae) are keystone species of semiarid to arid regions where the geographic center origin is Mexico but whose populations spread from southwestern U.S. through Central America, Caribbean, and into northern South America. Our analyses indicate that a young genus, between 7.8 10.1 million years old, yet it harbors most any genera in family. Of eight family, paraphyletic with respect three them, these four often grouped genus termed sensu lato, which 208 293 recognized...
The Cuatro Cienegas basin in the Chihuahuan desert is a system of springs, streams, and pools. These ecosystems support >70 endemic species abundant living stromatolites other microbial communities, representing oasis high biodiversity. Here, we combine data from molecular microbiology geology to document biodiversity this unique environment. Ten water samples locations within two neighboring valleys as well three wet sediments were analyzed. phylogeny prokaryotic populations was determined...
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• Premise of the study: Cactaceae is one most charismatic plant families because extreme succulence and outstanding diversity growth forms its members. Although cacti are conspicuous elements arid ecosystems in New World model systems for ecological anatomical studies, high morphological convergence scarcity phenotypic synapomorphies make evolutionary relationships trends among lineages difficult to understand. Methods: We performed phylogenetic analyses implementing parsimony ratchet...
The increasing aridity during the Last Glacial Maximum (LGM) has been proposed as a major factor affecting Neotropical species. character and intensity of this change, however, remains subject ongoing debate. This review proposes an approach to test contrasting paleoecological hypotheses by way their expected demographic genetic effects on cloud forest We reviewed 48 records encompassing LGM in Neotropics. show evidence regarding changes precipitation period. Some regions remained fairly...
ABSTRACT Current knowledge of genotypic and phenotypic diversity in the species Escherichia coli is based almost entirely on strains recovered from humans or zoo animals. In this study, we analyzed a collection 202 obtained 81 mammalian representing 39 families 14 orders Australia Americas, as well several reference strains; also included strain reptile 10 different birds collected Mexico. The were characterized genotypically by multilocus enzyme electrophoresis (MLEE) phenotypically...
The presence of Bacillus in very diverse environments reflects the versatile metabolic capabilities a widely distributed genus. Traditional phylogenetic analysis based on limited gene sampling is not adequate for resolving genus evolutionary relationships. By distinguishing between core and pan-genome, we determined functional relationships known Bacillus.Our upon twenty complete draft genomes, including newly sequenced isolate from an aquatic environment that report first time here. Using...
Early studies of protein evolution established that evolutionary rates vary among sites, genes, and lineages. Here, we review rate variation within each these three components, with an emphasis on plant nuclear genes. Evolutionary nucleotide sites as a consequence selection mutational biases. Mutation varies function the base, its neighboring bases, proximity to insertion-deletion polymorphisms. Nonsynonymous genes correlates most strongly gene expression, perhaps owing for translational...
See also the Commentary by Dick and Pennington
• Premise of the study: Land‐plant plastid genomes have only rarely undergone significant changes in gene content and order. Thus, discovery additional examples adds power to tests for causes such genome‐scale structural changes. Methods: Using next‐generation sequence data, we assembled genome saguaro cactus probed nuclear transferred genes functionally related genes. We combined these results with available data across Cactaceae seed plants more broadly infer history loss assess strength...
Summary It is still an open question as to whether genome size ( GS ) variation shaped by natural selection. One approach address this a population‐level survey that assesses both the in and relationship of ecological variants. We assessed Z ea mays , species includes cultivated crop, maize, its closest wild relatives, teosintes. measured five plants each 22 maize landraces 21 teosinte populations from M exico sampled parallel altitudinal gradients. was significantly smaller than teosintes,...
Significance Convergent and parallel evolution (homoplasy) is widespread in the tree of life can obscure evidence about phylogenetic relationships. Homoplasy be elevated genomes because individual loci may have independent evolutionary histories different from species history. We sequenced five cacti, including iconic saguaro Sonoran Desert three other columnar to investigate whether previously uncharacterized features genome might explain long-standing challenges understanding cactus...
Summary 1. The effects of phosphorus enrichment and grazing snails on a benthic microbial community that builds stromatolic oncolites were examined in an experiment at Rio Mesquites, Cuatro Ciénegas, Mexico. Chemical analyses stream water samples indicated overall atomic ratios total nitrogen (N) to (P) approximately 110, indicating strong potential for P‐limitation growth. 2. Phosphorus involved addition 5 μ mol Na 2 HPO 4 L −1 streamside microcosms receiving intermittent inputs while...
The Cuatro Ciénegas Basin (CCB) in the central part of Chihuahan desert (Coahuila, Mexico) hosts a wide diversity microorganisms contained within springs thought to be geomorphological relics an ancient sea. A major question remaining answered is whether bacteria from CCB are marine that adapted oligotrophic system poor NaCl, rich sulfates, and with extremely low phosphorus levels (<0.3 microM). Here, we report complete genome sequence Bacillus coahuilensis, sporulating bacterium isolated...
Background The species Zea mays includes both domesticated maize (ssp. mays) and its closest wild relatives known as the teosintes. While genetic archaeological studies have provided a well-established history of Z. evolution, there is currently minimal description current past distribution. Here, we implemented distribution modeling using paleoclimatic models last interglacial (LI; ∼135,000 BP) glacial maximum (LGM; ∼21,000 to hindcast subspecies over time revisit knowledge phylogeography...
The phylum Actinobacteria constitutes one of the largest and anciently divergent phyla within Bacteria domain. Actinobacterial diversity has been thoroughly researched in various environments due to its unique biotechnological potential. Such studies have focused mostly on soil communities, but more recently marine extreme also explored, finding rare taxa demonstrating dispersal limitation biogeographic patterns for Streptomyces. To test distribution populations a small scale, we chose...