CGB | Universidad Mayor

Dr. Pablo Villarreal

Assistant Professor

Synthetic Ecology and Evolution Lab.

PhD in Molecular Biotechnology, Universidad de Chile, Chile.

pablo.villareal@umayor.cl

Líneas de Investigación

  • Population dynamics of microbial communities under abiotic stress
  • Study of genetic-molecular mechanisms of microbial tolerance to high temperatures
  • Development of SynComs for agroecosystems

Social networks

Bluesky : @pablo-villa.bsky.social

Synthetic Ecology and Evolution Lab.

In the Synthetic Ecology and Evolution Lab (SEEL), we investigate how environmental factors (particularly temperature gradients and drought cycles) shape the structure, diversity, and metabolic activities of microbial communities. By combining field sampling across Chile’s unique latitudinal and bioclimatic zones (from sub-Antarctic soils to human-managed systems such as vineyards), we aim to uncover the molecular basis that governs ecological resilience under climatic stress. Additionally, in the context of global warming, we are interested in exploring how rising temperatures can encourage the emergence and proliferation of pathogenic species in natural environments.

To accomplish this, we employ advanced genomic and multi-omic tools. We use high-resolution community profiling via third-generation (Oxford Nanopore) and shotgun metagenomic sequencing to map taxonomic shifts and functional potentials in situ. Additionally, we employ environmental mesocosms that simulate drought and temperature extremes to connect changes in microbial composition with soil chemistry, nutrient cycling, and microbial community interactions.

In parallel, SEEL designs and evaluates Synthetic Microbial Communities (SynComs) for diverse applications, ranging from agricultural and environmental solutions to optimized production of fermented beverages. By employing a bottom-up assembly of defined yeast species, we develop consortia that not only promote plant growth and nutrient solubilization under stress but also deliver tailored fermentation profiles for beverage production. Our interdisciplinary approach at the intersection of genomics, microbiology, ecology, and biotechnology enhances our understanding of microbial ecosystem dynamics and translates it into sustainable solutions for agriculture and conservation.

Biological questions guiding our work

  1. How do temperature gradients and drought cycles alter the taxonomic composition and functional diversity of microbial communities?
  2. What molecular and metabolic mechanisms underlie these communities’ resilience to extreme climate variations?
  3. How does rising temperature influence the emergence and proliferation of pathogenic strains or species in natural ecosystems?
  4. Which eco-functional relationships (e.g., cooperation or competition) determine microbial community stability in mesocosms simulated under environmental stress?


Biography

Dr. Pablo Villarreal holds a degree in Molecular Biotechnology Engineering from the University of Chile. He completed his doctoral thesis at the Genetics Laboratory of the Faculty of Sciences at the same institution, where he investigated the physiological adaptation of Antarctic yeasts to low temperatures and freezing processes. Subsequently, as a postdoctoral researcher (2020–2023), he led the Fondecyt Postdoctoral Project 3200575, in which he combined phylogenomic and physiological approaches to characterize yeast populations from Patagonian and fermentative environments.

His research focuses on the functional dynamics of microbial communities under abiotic stress, the genetic and molecular mechanisms of thermal tolerance, and the design of synthetic consortia (SynComs) for agroecosystems. Since 2024, he has been leading the Fondecyt Iniciación Project 11240649, which explores the molecular bases of the adaptation of sub-Antarctic yeasts to temperature fluctuations.

He is currently an Assistant Professor at the Center for Genomics and Bioinformatics at Universidad Mayor, a Junior Researcher at the Millennium Institute for Integrative Biology (iBio), and participates in various interdisciplinary projects.


Selected publications

  1. Villarreal P., Molinet J., Braun-Galleani S. and Cubillos F.A. Non-conventional Yeast as a Source of Genetic Diversity and Biotechnological Potential. Annual Review of Microbiology. 2025.
  2. Zavaleta V., Valderrama-Soto D., Saona L. A., Minebois R., Querol A, Cubillos F.A and Villarreal P. 2025. Lachancea cidri long-term survival in co-cultures with S. cerevisiae modulates the wine aroma profile. Current Research in Food Science.
  3. Tomás A Peña, Pablo Villarreal, Nicolas Agier, Matteo De Chiara, Tomas Barría, Kamila Urbina, Carlos A Villarroel, Ana RO Santos, Carlos A Rosa, Roberto F Nespolo, Gianni Liti, Gilles Fischer, Francisco A Cubillos. 2024. An integrative taxonomy approach reveals Saccharomyces chiloensis sp. nov. as a newly discovered species from Coastal Patagonia. PLOS Genetics.
  4. Jennifer Molinet, Juan P Navarrete, Carlos A Villarroel, Pablo Villarreal, Felipe I Sandoval, Roberto F Nespolo, Rike Stelkens, Francisco A Cubillos. 2024. Wild Patagonian yeast improve the evolutionary potential of novel interspecific hybrid strains for Lager brewing. PLOS Genetics.
  5. Villarreal P., O’Donnell S., Nicolas Agier, Muñoz-Guzmán F., Benavides-Parra J., Urbina K., Peña T., Solomon M., Nespolo R.F., Fischer G., Varela C. and Cubillos F.A. 2023 Domestication signatures in the non-conventional yeast Lachancea cidri. mSystems.
Full list of publications

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Contact

Corporate building, first underground - Campus Huechuraba - Camino La Pirámide 5750, Huechuraba
+56 2 2328 1323|cgbum@umayor.cl