Ulises Rosas

Ulises Rosas
Universidad Nacional Autónoma de México | UNAM · Jardín Botánico - Instituto de Biología

PhD. John Innes Centre, UK

About

58
Publications
35,474
Reads
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773
Citations
Citations since 2017
20 Research Items
533 Citations
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2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
Introduction
Investigador at Instituto de Biología - Jardín Botánico (Universidad Nacional Autónoma de México). orcid.org/0000-0001-5088-2679
Additional affiliations
November 2015 - present
Universidad Nacional Autónoma de México
Position
  • Investigador Asociado C
April 2010 - October 2015
New York University
Position
  • PostDoc Position
August 2009 - December 2009
University of Michigan
Position
  • Visiting Postdoctoral Scientist - Royal Society Darwin Exchange Programme
Education
October 2004 - February 2009
John Innes Centre
Field of study
  • Plant and Microbial Sciences
September 2003 - August 2004
University of East Anglia
Field of study
  • Plant Breeding and Biotechnology
September 1997 - December 2002

Publications

Publications (58)
Article
Full-text available
The onset of flowering, the change from vegetative to reproductive development, is a major life history transition in flowering plants. Recent work suggests that mutations in cis-regulatory mutations should play critical roles in the evolution of this (as well as other) important adaptive traits, but thus far there has been little evidence that dir...
Article
Full-text available
Significance Species display a range of plastic phenotypes that presumably have evolved as a result of adaptation to heterogeneous environments. We asked whether the genetic mechanisms that underlie adaptation across populations also determine the response of an individual plant to environmental cues in Arabidopsis . Using an integrative root pheno...
Article
Full-text available
Organisms in the wild are subject to multiple, fluctuating environmental factors, and it is in complex natural environments that genetic regulatory networks actually function and evolve. We assessed genome-wide gene expression patterns in the wild in two natural accessions of the model plant Arabidopsis thaliana and examined the nature of transcrip...
Article
Full-text available
Crosses between closely related species give two contrasting results. One result is that species hybrids may be inferior to their parents, for example, being less fertile [1]. The other is that F1 hybrids may display superior performance (heterosis), for example with increased vigour [2]. Although various hypotheses have been proposed to account fo...
Article
In plant roots, prokaryote-plant interactions have been extensively studied worldwide, demonstrating their importance for plant survival and growth, through the exploitation of microbial metabolic processes, such as nitrogen fixation and Extracellular Polymeric Substances (EPS). Climatic and edaphological forces structure the soil bacterial pool fr...
Article
Full-text available
In outcrossing species, inbreeding reduces fitness because homozygous deleterious alleles increase their frequency in what is called inbreeding depression. The theory well predicts this phenomenon; however, it is often unclear what proxies of fitness inbreeding might affect. Inbreeding depression in aquatic plants is not extensively studied. To fil...
Article
Full-text available
Background: Hybridization in nature occurs in numerous botanical families. In particular, the Cactaceae family contains lots of genera in which hybridization is reported. Questions: What are the patterns of reported natural hybridization in Cactaceae and their probable causes? Are there phylogenetic and evolutionary implications related to hybridi...
Article
Full-text available
Background A puzzle in evolution is the understanding of how the environment might drive subtle phenotypic variation, and whether this variation is adaptive. Under the neutral evolutionary theory, subtle phenotypes are almost neutral with little adaptive value. To test this idea, we studied the infraspecific variation in flower shape and color in M...
Article
Full-text available
Genetic mechanisms controlling root development are well-understood in plant model species, and emerging frontier research is currently dissecting how some of these mechanisms control root development in cacti. Here we show the patterns of root architecture development in a gradient of divergent lineages, from populations to species in Mammillaria....
Article
Full-text available
Flowers are defined as short shoots that carry reproductive organs. In Cactaceae, this term acquires another meaning, since the flower is interpreted as a branch with a perianth at the tip, with all reproductive organs embedded within the branch, thus giving way to a structure that has been called a "flower shoot". These organs have long attracted...
Article
Full-text available
Mammillaria (Cactaceae) taxonomy has been historically problematic due to the morphological variability and sympatry of the species. This has led to several proposals for infrageneric classification, including subgeneric, section and series categories. Mammillaria ser. Supertextae is one of 15 series and is made up of a variable set of species that...
Article
Echinocactus platycanthus is a remarkable globular cacti that can reach sizes up to 2 m in diameter, and is known for its high tolerance to salt stress, as they inhabit arid environments where salinity is prominent. Understanding the early developmental events of salt tolerance and stress responses will help understand how seedlings establish in ar...
Article
Full-text available
Megapolis such as Mexico City, have atmospheric pollutants that interact with the humidity and solar radiation. The topography of this city promotes air stagnation, generating atmospheric pollutants and episodes of acid rain, a phenomenon well recorded since the end of the 1980s. However, little we know about how urban trees respond to acid rain in...
Article
Full-text available
The genus Mammillaria occupies diverse habitats and exhibits diverse growth patterns and a large range of morphologies. Most of the species of this genus are used as ornamental plants and are subject to mass habitat loss. Due to these factors, they are being submitted to selective pressure that might affect conservational efforts and management pla...
Article
Full-text available
The root is the main organ through which water and mineral nutrients enter the plant organism. In addition, root fulfils several other functions. Here, we propose that the root also performs the barrier function, which is essential not only for plant survival but for plant acclimation and adaptation to a constantly changing and heterogeneous soil e...
Article
Full-text available
Arabidopsis naturally occurring populations have allowed for the identification of considerable genetic variation remodeled by adaptation to different environments and stress conditions. Water is a key resource that limits plant growth, and its availability is initially sensed by root tissues. The root’s ability to adjust its physiology and morphol...
Article
Full-text available
Date palms (Phoenix dactylifera) are an important fruit crop of arid regions of the Middle East and North Africa. Despite its importance, few genomic resources exist for date palms, hampering evolutionary genomic studies of this perennial species. Here we report an improved long-read genome assembly for P. dactylifera that is 772.3 Mb in length, wi...
Article
Full-text available
Root architecture is a complex structure that comprises multiple traits of the root phenotype. Novel platforms and models have been developed to better understand root architecture. In this methods paper, we introduce a novel allometric model, named rhizochron index (m), which describes lateral root (LR) branching and elongation patterns across the...
Article
Full-text available
Background: Distinguishing species and populations in Crassulaceae is challenging because of the morphological variability and inter-specific hybridization. Currently our understanding of the morphological and anatomical features in Echeveria is poor, and therefore it is difficult to delimit species, and morphotypes within the species. Question: O...
Article
Full-text available
Evolutionary changes in enhancers, which control gene expression, often contribute to phenotypic evolution. Here, Kalay et al. examine how enhancer activities are encoded within non-coding sequences surrounding the pigmentation gene yellow from three Drosophila species... Cis-regulatory sequences known as enhancers play a key role in regulating gen...
Preprint
Full-text available
cis-regulatory sequences known as enhancers play a key role in regulating gene expression. Evolutionary changes in these DNA sequences contribute to phenotypic evolution. The Drosophila yellow gene, which is required for pigmentation, has emerged as a model system for understanding how cis-regulatory sequences evolve, providing some of the most det...
Article
Full-text available
INTRODUCTION In the first months of 2016, the Mexico City Metropolitan Area experienced the worst air pollution crisis in the last decade, prompting drastic short-term solutions by the Mexico City Government and neighboring States. In order to help further the search for long-term sustainable solutions, we felt obliged to immediately release the re...
Article
Full-text available
Date palms (Phoenix dactylifera) are the most significant perennial crop in arid regions of the Middle East and North Africa. Here, we present a comprehensive catalogue of approximately seven million single nucleotide polymorphisms in date palms based on whole genome re-sequencing of a collection of 62 cultivars. Population structure analysis indic...
Data
Supplementary Figures 1-7 and Supplementary Tables 1-10
Data
Candidate genes in flowering time, sugar metabolism, fruit maturation, 25 and disease resistance pathways.
Article
Full-text available
We performed whole-genome resequencing of 12 field isolates and eight commonly studied laboratory strains of the model organism Chlamydomonas reinhardtii to characterize genomic diversity and provide a resource for studies of natural variation. Our data support previous observations that Chlamydomonas is among the most diverse eukaryotic species. N...
Article
Full-text available
The architecture of plant roots affects essential functions including nutrient and water uptake, soil anchorage, and symbiotic interactions. Root architecture comprises many features that arise from the growth of the primary and lateral root. These root features are dictated by the genetic background, but are also highly responsive to the environme...
Data
Replicate quality for eight Bay-0 and 10 Sha samples. Average pairwise correlations between triplicate samples (with the exception of Sha timepoint 7 for which one sample was lost) for each sample. (TIF)
Data
Number of genes considered “present” in all three replicates by Affymetrix MAS 5 algorithm. Shown are counts of genes present for each sample for Bay-0 and Sha as well as across all Bay-0 and across all Sha and across both. Also shown are the total gene counts with “present” calls across all three replicates in the whole ATGen Express data set and...
Data
List of genes most strongly correlated to PC1veg (upper and lower most 2.5% of the quantile distributions). (DOCX)
Data
List of genes most strongly correlated to PC2veg (upper and lower most 2.5% of the quantile distributions). (DOCX)
Data
Significant differences in fitness (fruit number) associated with gene functions in fluctuating temperature (PC1veg) and water availability (PC2veg) treatments (DOCX)
Data
Gene Ontology (GO) categories for genes that were considered “absent” in all three replicates of at least one sample. Approximately 1/3 of the genome of both Bay-0 (8,322 genes) and Sha (7,948) were not detected in this study: (A) By far the majority in both accessions were unannotated genes. (B) Typically the number of genes in each GO category wa...
Data
GO categories for genes that were detected as significantly different in an ANOVA for the main effects of accession and flowering status. Although there were 306 genes that showed a significant interaction. (DOCX)
Data
List of genes correlated to PC1veg (upper and lower 2.5% to 5% of the quantile distributions). (DOCX)
Data
List of genes correlated to PC2veg (upper and lower 2.5 to 5% of the quantile distributions). (DOCX)
Data
Fitness assays showing the mutants that had significant accession-by-environment interaction as response to drought. (TIF)
Article
Full-text available
Succulent cacti are remarkable plants with capabilities to withstand long periods of drought. However, their adult success is contingent on the early seedling stages, when plants are highly susceptible to the environment. To better understand their early coping strategies in a challenging environment, two developmental aspects (anatomy and morpholo...
Data
Sections of the time-course of development in Polaskia chichipe. DAG: days after germination. CO: cortex; PI: pith; VB: vascular bundle; TC: turgid cells; GCC: groups of collapsible cells. Magnifications 2.5×. (TIF)
Data
Sections of the time-course of development in Echinocactus platyacanthus. DAG: days after gemination. CO: cortex; PI: pith; VB: vascular bundle; TC: turgid cells; GCC: groups of collapsible cells. Magnifications 2.5×. (TIF)
Article
Full-text available
We report the quantitative genetic analysis of seed oil quality and quantity in six Arabidopsis thaliana recombinant inbred populations, in which the parent accessions were from diverse geographical origins, and were selected on the basis of variation for seed oil content and lipid composition. Although most of the biochemical steps involved in lip...
Conference Paper
Phenotypic plasticity is the ability of a particular genotype to produce diverse phenotypes when exposed to different environmental conditions. Despite advances in our understanding of the theoretical and empirical aspects of phenotypic plasticity, little is known on how multiple environmental signals are integrated in regulating developmental re...
Data
The notch phenotype in double heterozygote F1 hybrids. Left, hybrids with “notch” phenotype. Right, hybrids with wild-type phenotype. Grey line denotes the “notch.” (1.56 MB TIF)
Data
The effect of random drift on the mutation load at a biallelic locus. The mutation load, relative to its maximum s, is plotted against Nes. The dashed lines at the right show the large Nes limit with no dominance (heavy lines) and for h = 0.05 (light dashed lines). The dashed line at the left shows the limit of small Neμ, which is independent of do...
Data
Heterosis and the drift load. (0.14 MB DOC)
Article
Full-text available
Quantitative approaches are now widely used to study the genetic architecture of complex traits. However, most studies have been conducted in single mapping populations, which sample only a fraction of the natural allelic variation available within a gene pool and can identify only a subset of the loci controlling the traits. To enable the progress...
Article
Full-text available
The effect of different combinations of chemical scarification, soaking and substrates (ex vitro and in vitro) on seed germination ofPolaskia chichipe (Goss.) Backeberg and Echinocactus platyacanthus Link & Otto fa. grandis (Rose) Bravo-Hollis, collected in the Tehuacan Valley, Mexico, were studied. The P chichipe seeds did not require either chemi...

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