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Collaborative research: Dimensions US-São Paulo: integrating phylogeny, genetics, and chemical ecology to unravel the tangled bank of the multipartite fungus-farming ant symbiosis

Grant number: 19/03746-0
Support type:BIOTA-FAPESP Program - Thematic Grants
Duration: September 01, 2019 - August 31, 2024
Field of knowledge:Biological Sciences - Microbiology
Cooperation agreement: NSF - Dimensions of Biodiversity and BIOTA
Principal Investigator:André Rodrigues
Grantee:André Rodrigues
Principal investigator abroad: Bryn Dentinger
Institution abroad: University of Utah (U), United States
Home Institution: Centro de Estudos de Insetos Sociais (CEIS). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
Co-Principal Investigators:Cameron Robert Currie ; Eric Schmidt ; Mauricio Bacci Junior ; Nicole Marie Gerardo ; Theodore Robert Schultz
Assoc. researchers:Fábio Santos do Nascimento ; Milene Ferro ; Pepijn Kooij ; Simon Luke Elliot
Associated scholarship(s):20/04639-0 - Lyophilization of cultures of fungi in the genus Escovopsis, BP.TT
19/24412-2 - Diversity and functional roles of yeasts in fungus-growing insects, BP.DR
19/23391-1 - Mycoparasitism in the attine ant fungiculture: host competition in multiple infections, BP.IC

Abstract

Overview: Species interactions can drive diversification. This is particularly true in cases of coevolved symbioses, where coevolutionary processes can lead to the generation and maintenance of novel functional and genetic diversity as organisms respond to each over microevolutionary timescales. Furthermore, such evolutionary coupling can lead to taxonomic diversification, as one or more partners track one another over macroevolutionary time scales. While this is widely recognized, much of the underlying diversity in such systems may be obscured without extensive sampling and taxonomic investigation. This research takes a comprehensive approach to uncover suspected hidden diversity within an iconic example of symbiotic coevolution, the fungus-growing ant symbiosis. Through broad geographic sampling, targeting taxa in which we expect to encounter cryptic species, the research team will uncover phylogenetic and taxonomic diversity of the over two hundred species of ants, their cultivated fungi, parasites that attack these fungi, and bacteria that function in garden defense and metabolic processes. Coupling metatranscriptomic and metabolomic approaches, they will characterize genetic diversity, assessing whether and how the functions of the ants' garden microbiomes complement those of the core symbionts within the system. Finally, recognizing that chemical interactions are key drivers of most species' interactions, they will use cutting-edge techniques in natural products research to discover the functional chemistry underlying symbiont communication, pathogen suppression, and mutualistic facilitation. This project benefits from the wide-ranging expertise of the US-Brazil investigative team, whose researchs pans insect and fungal taxonomy, phylogenetics, genomics, and natural products chemistry. Intellectual Merit: While profound insights into organismal evolution and diversification have been gained through the study of two-way interactions between predators and prey, between hosts and parasites, and between mutualistic partners, there is increasing recognition that such coevolutionary processes are embedded within complex ecological communities that involve other species, many of which are microbes. This complexity may lead to diffuse coevolution, where interacting species do not evolve in response only to one another but to multiple potential partners and antagonists. Assessing whether coevolution and specialization can be strictly maintained in such a context requires extensive sampling and understanding of the taxonomic, phylogenetic, and functional diversity within a system. Building on previous research in the fungus-growing ant symbiosis, this research will leverage the diversity of this tractable symbiosis to address this central question. Broader Impacts: As a textbook example of symbiosis and coevolution, the fungus-growing ant system has an extensive history of research and captivates the public. The team will take a unique approach to collaborate with a historian to document their international research and how it builds on previous research. Video interviews stemming from this collaboration will serve as the backbone of a multimedia video installation, which will be displayed at two museums and a public science festival. In Brazil, the researchers will lead a workshop for graduate and undergraduate students on microbial isolation. The project will train post docs, graduate students, and undergraduates, who will be recruited through a targeted approach to reach candidates from backgrounds underrepresented in STEM. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BARCOTO, MARIANA O.; CARLOS-SHANLEY, CAMILA; FAN, HUAN; FERRO, MILENE; NAGAMOTO, NILSON S.; BACCI, JR., MAURICIO; CURRIE, CAMERON R.; RODRIGUES, ANDRE. Fungus-growing insects host a distinctive microbiota apparently adapted to the fungiculture environment. SCIENTIFIC REPORTS, v. 10, n. 1 JUL 24 2020. Web of Science Citations: 0.
GOES, ARYEL C.; BARCOTO, MARIANA O.; KOOIJ, PEPIJN W.; BUENO, ODAIR C.; RODRIGUES, ANDRE. How Do Leaf-Cutting Ants Recognize Antagonistic Microbes in Their Fungal Crops?. FRONTIERS IN ECOLOGY AND EVOLUTION, v. 8, MAY 5 2020. Web of Science Citations: 0.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.