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Cloning of the unculturable parasite Pasteuria ramosa and its Daphnia host reveals extreme genotype-genotype interactions

Luickx, P. and Ben-Ami, F. and Mouton, L. and Du Pasquier, L. and Ebert, D.. (2011) Cloning of the unculturable parasite Pasteuria ramosa and its Daphnia host reveals extreme genotype-genotype interactions. Ecology letters, 14 (2). pp. 125-131.

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Official URL: http://edoc.unibas.ch/dok/A5841536

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Abstract

The degree of specificity in host–parasite interactions has important implications for ecology and evolution. Unfortunately, specificity can be difficult to determine when parasites cannot be cultured. In such cases, studies often use isolates of unknown genetic composition, which may lead to an underestimation of specificity. We obtained the first clones of the unculturable bacterium Pasteuria ramosa, a parasite of Daphnia magna. Clonal genotypes of the parasite exhibited much more specific interactions with host genotypes than previous studies using isolates. Clones of P. ramosa infected fewer D. magna genotypes than isolates and host clones were either fully susceptible or fully resistant to the parasite. Our finding enhances our understanding of the evolution of virulence and coevolutionary dynamics in this system. We recommend caution when using P. ramosa isolates as the presence of multiple genotypes may influence the outcome and interpretation of some experiments.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Zoologie > Evolution des Immunsystems (Du Pasquier)
UniBasel Contributors:Du Pasquier, Louis and Ebert, Dieter and Luijckx, Pepijn
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Blackwell
ISSN:1461-023X
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:12 Jan 2017 11:39
Deposited On:08 Nov 2012 16:12

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