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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018


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Taxonomy and phylogeny of symbiotic bacteria associated with entomopathogenic nematodes

Since the end of 1980s, our laboratory is considered as a reference laboratory in taxonomy and phylogeny of Photorhabdus and Xenorhabdus.

We have a unique collection of #150 Photorhabdus strains distributed within 4 described species and #150 Xenorhabdus strains distributed within more than 20 species1. Since 2008, our team described 2 new Xenorhabdus species (Tailliez et al., 2010; 2012), 3 new Photorhabdus luminescens subspecies, 2 new Photorhabdus temperata subspecies and reclassified P. luminescens subsp. thracensis as P. temperata subsp. thracensis (Tailliez et al., 2010; Ferreira et al., 2013). Several manuscripts are in preparation describing new Xenorhabdus species carried by entomopathogenic nematodes such as Steinernema costaricense, S. ethiopiense and S. schliemanii and a new Photorhabdus species carried by populations of Heterorhabditis zealandica collected in South Africa (Ferreira et al.2014).

Also, we regularly develop modern approaches for improving the taxonomic and phylogenetic characterization of new bacterial isolates (Campos-Herrera et al., 2009; Tailliez et al., 2010 and 2012; Ferreira et al., 2013 and 2014) and new nematode populations (Emelianoff et al., 2008; Noujeim et al., 2011). During this last period, our efforts were focused on the development of more robust phylogenetic topologies using a multigene approach (Tailliez et al., 2010; 2012). Our approaches are now usually used by our colleagues for the classification, taxonomy and phylogeny within the bacterial genera Photorhabdus (Kuwata et al., 2012; Ferreira et al., 2014) and Xenorhabdus (Orozco et al., 2013; Ferreira et al., 2013a).

1Collections taxonomiques, collections vivantes et ressources génétiques pour la biodiversité. 2013. Dossier thématique n°17 AgroPolis International, p28-29.