Agenda

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Séminaires CBI de la semaine du 24-07-2023 au 30-07-2023

Lundi 24 Juillet

CODE séminaire interne
Titre : seminaire code
11:00
4R4-RDC | Salle Conférence (182 pers.)

Mardi 25 Juillet

Erik Frank (University of Würzburg, Germany)
BEHAVIOR séminaire public
Titre : Evolution of Social Wound Care in Ants: from amputations to antimicrobials
12:15
4R4-RDC | Salle Conférence (182 pers.)

In ants, individuals that lost an extremity are cared for by their nestmates. In case of infection, ants often use the metapleural gland, but some genera lost this gland in their evolutionary history. Here we compare two different behaviours to combat an infected wound, one with the metapleural gland and one without. Megaponera analis treats infected wounds with antimicrobial compounds secreted from the metapleural gland, thereby reducing mortality of infected ants by 90%. Further analyses of the metapleural gland secretions of M. analis revealed over 121 chemical compounds and 41 proteins, half of which have an antimicrobial effect. Ants from the genus Camponotus do not have this gland at their disposal. Remarkably, we observed that workers amputated the infected leg by biting it off at its base. This behaviour halted the infection and guaranteed the survival of the injured ant. The large phylogenetic distance between Megaponera and Camponotus and their strikingly different natural history (Megaponera a group-hunting predator, Camponotus a solitary foraging generalist) suggest that wound care behaviour could be much more widespread in social insects. Overall, we reveal a multifaceted care system, which can differentiate between sterile and infected wounds and treats them either with antimicrobial compounds or amputations.

Mercredi 26 Juillet

Jeudi 27 Juillet

Vendredi 28 Juillet

Samedi 29 Juillet

Dimanche 30 Juillet

Université Paul Sabatier
118 Route de Narbonne

31062 TOULOUSE Cedex
France


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