Symbiotic adaptations in the fungal cultivar of leaf-cutting ants.

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Symbiotic adaptations in the fungal cultivar of leaf-cutting ants. / de Fine Licht, Henrik Hjarvard; Boomsma, Jacobus J; Tunlid, Anders.

I: Nature Communications, Vol. 5, 5675, 2014.

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de Fine Licht, Henrik Hjarvard ; Boomsma, Jacobus J ; Tunlid, Anders. / Symbiotic adaptations in the fungal cultivar of leaf-cutting ants. I: Nature Communications. 2014 ; Vol. 5.

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TY - JOUR

T1 - Symbiotic adaptations in the fungal cultivar of leaf-cutting ants.

AU - de Fine Licht, Henrik Hjarvard

AU - Boomsma, Jacobus J

AU - Tunlid, Anders

PY - 2014

Y1 - 2014

N2 - Centuries of artificial selection have dramatically improved the yield of human agriculture; however, strong directional selection also occurs in natural symbiotic interactions. Fungus-growing attine ants cultivate basidiomycete fungi for food. One cultivar lineage has evolved inflated hyphal tips (gongylidia) that grow in bundles called staphylae, to specifically feed the ants. Here we show extensive regulation and molecular signals of adaptive evolution in gene trancripts associated with gongylidia biosynthesis, morphogenesis and enzymatic plant cell wall degradation in the leaf-cutting ant cultivar Leucoagaricus gongylophorus. Comparative analysis of staphylae growth morphology and transcriptome-wide expressional and nucleotide divergence indicate that gongylidia provide leaf-cutting ants with essential amino acids and plant-degrading enzymes, and that they may have done so for 20-25 million years without much evolutionary change. These molecular traits and signatures of selection imply that staphylae are highly advanced coevolutionary organs that play pivotal roles in the mutualism between leaf-cutting ants and their fungal cultivars.

AB - Centuries of artificial selection have dramatically improved the yield of human agriculture; however, strong directional selection also occurs in natural symbiotic interactions. Fungus-growing attine ants cultivate basidiomycete fungi for food. One cultivar lineage has evolved inflated hyphal tips (gongylidia) that grow in bundles called staphylae, to specifically feed the ants. Here we show extensive regulation and molecular signals of adaptive evolution in gene trancripts associated with gongylidia biosynthesis, morphogenesis and enzymatic plant cell wall degradation in the leaf-cutting ant cultivar Leucoagaricus gongylophorus. Comparative analysis of staphylae growth morphology and transcriptome-wide expressional and nucleotide divergence indicate that gongylidia provide leaf-cutting ants with essential amino acids and plant-degrading enzymes, and that they may have done so for 20-25 million years without much evolutionary change. These molecular traits and signatures of selection imply that staphylae are highly advanced coevolutionary organs that play pivotal roles in the mutualism between leaf-cutting ants and their fungal cultivars.

U2 - 10.1038/ncomms6675

DO - 10.1038/ncomms6675

M3 - Article

VL - 5

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 5675

ER -