Le mercredi 12 mars 2014, en salle de conférences de l'OSUR, campus de Beaulieu, bât.
Le mercredi 12 mars 2014
, en salle de conférences de l'OSUR, campus de Beaulieu, bât. 14b, UR1Microbial partners that support the life of phloem-feeding insectsRésumé :
In nature, the most intimate association is found in “endosymbiosis”. Endosymbiosis is a phenomenon that typically microbial partner lives within its host body. Recent studies have revealed that symbionts confer various environmental adaptations to the host. Here I present an overview of our recent outcomes using phloem-feeding insects.
1) The color variation of animals shows ecologically important traits. Recently we found that Rickettsiella symbiont modifies aphid body color. Rickettsiella-induced body color change seems affect on prey-predation interactions. I present the latest results revealed from multi-directional mechanistic studies.
2) Symbiotic bacteria provide host with some nutrients that are deficient in plant sap. Series of our studies indicate that the whitefly Bemisia tabaci possess two symbiotic bacteria contributing for essential amino acids production. Interestingly, those essential symbionts are localized in the same cells specialized for endosymbiosis with subcellular compartmentalization. The mechanisms establishing this unique endosymbiotic system will be discussed. Contact : Tsutomu TSUCHIDA