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The evolution of thermal performance curves in fungi farmed by attine ant mutualists in above-ground or below-ground microclimates.
J Evol Biol
January 2025
Department of Biology, Section for Ecology and Evolution, University of Copenhagen, Copenhagen, Denmark.
Fungi are abundant and ecologically important at a global scale, but little is known about whether their thermal adaptations are shaped by biochemical constraints (i.e., the hotter is better model) or evolutionary tradeoffs (i.
View Article and Find Full Text PDFFrom the inside out: Were the cuticular bacteria of fungus-farming ants originally domesticated as gut symbionts?
PNAS Nexus
October 2024
Centre for Social Evolution, Section for Ecology and Evolution, Department of Biology, University of Copenhagen, 2100 Copenhagen, Denmark.
The mutualistic interaction specificity between attine ants and antibiotic-producing Actinobacteria has been controversial because strains cannot always be isolated from worker cuticles across attine ant species, while other actinobacteria can apparently replace and also inhibit growth of mycopathogens. Here we report that across field samples of Panamanian species: (i) Cuticular were largely restricted to species in the crown of the attine phylogeny and their appearance likely coincided with the first attines colonizing Central/North America. (ii) The phylogenetically basal attines almost always had cuticular associations with other Actinobacteria than .
View Article and Find Full Text PDFThe coevolution of fungus-ant agriculture.
Science
October 2024
Department of Plant Pathology and Crop Physiology, Louisiana State University AgCenter, Baton Rouge, LA, USA.
Fungus-farming ants cultivate multiple lineages of fungi for food, but, because fungal cultivar relationships are largely unresolved, the history of fungus-ant coevolution remains poorly known. We designed probes targeting >2000 gene regions to generate a dated evolutionary tree for 475 fungi and combined it with a similarly generated tree for 276 ants. We found that fungus-ant agriculture originated ~66 million years ago when the end-of-Cretaceous asteroid impact temporarily interrupted photosynthesis, causing global mass extinctions but favoring the proliferation of fungi.
View Article and Find Full Text PDFTwo +ssRNA mycoviruses cohabiting the fungal cultivar of leafcutter ants.
Virol J
September 2024
Section for Ecology and Evolution, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100, Copenhagen, Denmark.
Leafcutter ants are dominant herbivores in the Neotropics and rely on a fungus (Leucoagaricus gongylophorus) to transform freshly gathered leaves into a source of nourishment rather than consuming the vegetation directly. Here we report two virus-like particles that were isolated from L. gongylophorus and observed using transmission electron microscopy.
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