Ancient Tripartite Coevolution in the Attine Ant-Microbe Symbiosis

The symbiosis between fungus-growing ants and the fungi they cultivate for food has been shaped by 50 million years of coevolution. Phylogenetic analyses indicate that this long coevolutionary history includes a third symbiont lineage: specialized microfungal parasites of the ants' fungus gardens. At ancient levels, the phylogenies of the three symbionts are perfectly congruent, revealing that the ant-microbe symbiosis is the product of tripartite coevolution between the farming ants, their cultivars, and the garden parasites. At recent phylogenetic levels, coevolution has been punctuated by occasional host-switching by the parasite, thus intensifying continuous coadaptation between symbionts in a tripartite arms race.

[1]  Ted R. Schultz,et al.  Evolutionary History of the Symbiosis Between Fungus-Growing Ants and Their Fungi , 1994, Science.

[2]  James A. Scott,et al.  Fungus-growing ants use antibiotic-producing bacteria to control garden parasites , 1999, Nature.

[3]  U. Mueller,et al.  The Origin of the Attine Ant-Fungus Mutualism , 2001, The Quarterly Review of Biology.

[4]  Eörs Szathmáry,et al.  The Major Transitions in Evolution , 1997 .

[5]  T. Schultz,et al.  Phylogeny of fungus-growing ants (Tribe Attini) based on mtDNA sequence and morphology. , 1998, Molecular phylogenetics and evolution.

[6]  J. M. Cherrett,et al.  The role of leaf‐cutting ant workers (Hymenoptera: Formicidae) in fungus garden maintenance , 1994 .

[7]  U. Mueller,et al.  Extensive exchange of fungal cultivars between sympatric species of fungus‐growing ants , 2002, Molecular ecology.

[8]  C. Currie,et al.  Weeding and grooming of pathogens in agriculture by ants , 2001, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[9]  T. Schultz,et al.  Phylogeny of the attine ant fungi based on analysis of small subunit ribosomal RNA gene sequences. , 1994, Science.

[10]  S. Rehner,et al.  PARTIAL INCOMPATIBILITY BETWEEN ANTS AND SYMBIOTIC FUNGI IN TWO SYMPATRIC SPECIES OF ACROMYRMEX LEAF‐CUTTING ANTS , 2001, Evolution; international journal of organic evolution.

[11]  Lynn Margulis,et al.  Symbiosis as a source of evolutionary innovation : speciation and morphogenesis , 1991 .

[12]  D. Boucher.  The Biology of mutualism :: ecology and evolution , 1985 .

[13]  References , 1971 .

[14]  J. M. Cherrett,et al.  The role of substrate preparation in the symbiosis between the leaf‐cutting ant Acromyrmex octospinosus (Reich) and its food fungus , 1977 .

[15]  A. Castle,et al.  Morphological and Molecular Identification ofTrichoderma Isolates on North American Mushroom Farms , 1998, Applied and Environmental Microbiology.

[16]  D. Swofford.  PAUP*: Phylogenetic analysis using parsimony (*and other methods), Version 4.0b10 , 2002 .

[17]  C. Currie,et al.  A community of ants, fungi, and bacteria: a multilateral approach to studying symbiosis. , 2001, Annual review of microbiology.

[18]  김삼묘,et al.  “Bioinformatics” 특집을 내면서 , 2000 .

[19]  宁北芳,et al.  疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A , 2005 .

[20]  J. Ashby.  References and Notes , 1999 .

[21]  C. Russell.  The Global Geospace Mission , 1995 .

[22]  T. Schultz,et al.  A phylogenetic analysis of the fungus‐growing ants (Hymenoptera: Formicidae: Attini) based on morphological characters of the larvae , 1995 .

[23]  U. Mueller,et al.  The evolution of agriculture in ants , 1998, Science.

[24]  C W Jackson,et al.  Evolutionary aspects of ant-fungus interactions in leaf-cutting ants. , 1997, Trends in ecology & evolution.

[25]  U. Mueller,et al.  The agricultural pathology of ant fungus gardens. , 1999, Proceedings of the National Academy of Sciences of the United States of America.

[26]  Vernon Ahmadjian,et al.  Symbiosis: An Introduction to Biological Associations , 1988 .