History of the invasion of the anther smut pathogen on Silene latifolia in North America
Article first published online: 13 FEB 2013
© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust
Volume 198, Issue 3, pages 946–956, May 2013
How to Cite
Fontaine, M. C., Gladieux, P., Hood, M. E. and Giraud, T. (2013), History of the invasion of the anther smut pathogen on Silene latifolia in North America. New Phytologist, 198: 946–956. doi: 10.1111/nph.12177
- Issue published online: 12 APR 2013
- Article first published online: 13 FEB 2013
- Manuscript Accepted: 9 JAN 2013
- Manuscript Received: 15 OCT 2012
- Emerfundis project
- Ile de France Région
- NSF-DEB. Grant Numbers: 0747222, 1115765
- mating system;
- Microbotryum silenes-dioicae ;
- Microbotryum violaceum ;
- plant pathogen;
- population genetics;
Understanding the routes of pathogen introduction contributes greatly to efforts to protect against future disease emergence.
- Here, we investigated the history of the invasion in North America by the fungal pathogen Microbotryum lychnidis-dioicae, which causes the anther smut disease on the white campion Silene latifolia. This system is a well-studied model in evolutionary biology and ecology of infectious disease in natural systems.
- Analyses based on microsatellite markers show that the introduced American M. lychnidis-dioicae probably came from Scotland, from a single population, and thus suffered from a drastic bottleneck compared with genetic diversity in the native European range. The pattern in M. lychnidis-dioicae contrasts with that found by previous studies in its host plant species S. latifolia, also introduced in North America. In the plant, several European lineages have been introduced from across Europe. The smaller number of introductions for M. lychnidis-dioicae probably relates to its life history traits, as it is an obligate, specialized pathogen that is neither transmitted by the seeds nor persistent in the environment.
- The results show that even a nonagricultural, biotrophic, and insect-vectored pathogen suffering from a very strong bottleneck can successfully establish populations on its introduced host.