The anther smut disease on Gypsophila repens: a case of parasite sub-optimal performance following a recent host shift? - PubMed (original) (raw)
Comparative Study
. 2005 Sep;18(5):1293-303.
doi: 10.1111/j.1420-9101.2005.00924.x.
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- PMID: 16135124
- DOI: 10.1111/j.1420-9101.2005.00924.x
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Comparative Study
The anther smut disease on Gypsophila repens: a case of parasite sub-optimal performance following a recent host shift?
M López-Villavicencio et al. J Evol Biol. 2005 Sep.
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Abstract
The study of how parasites adapt to new hosts is of great importance for understanding the emergence of new diseases. Here, we report a study of the anther smut disease on Gypsophila repens (Caryophyllaceae). In contrast to what is usually found on other host species, infected natural populations of G. repens are extremely rare. Moreover, symptoms of diseased plants are incomplete and highly variable over the time. These results suggest that the fungus infecting G. repens is a case of a parasite not capable of exploiting its host optimally. Molecular analyses of Microbotryum violaceum strains infecting this and other Caryophyllaceae revealed that this sub-optimal behaviour probably resulted from a recent host shift from the morphologically similar plant Petrorhagia saxifraga. With its exceptionally low virulence and prevalence, but apparent self-sustainability, the disease on G. repens may thus represent an interesting case study for investigating the conditions leading to adaptation of parasites on new hosts.
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