The genome of “
Portiera aleyrodidarum,” the primary endosymbiont of the whitefly
(Mediterranean species), is reported. It presents a reduced genome (357 kb) encoding the capability to synthetize, or participate in the synthesis of, several amino acids and carotenoids, being the first insect endosymbiont capable of supplying carotenoids.
The sequence of the genome of “
Tremblaya princeps” strain PCVAL, the primary endosymbiont of the citrus mealybug
, has been determined. “
. Tremblaya princeps” presents an unusual nested endosymbiosis and harbors a gammaproteobacterial symbiont within its cytoplasm in all analyzed mealybugs. The genome sequence reveals that “
. Tremblaya princeps” cannot be considered an independent organism but that the consortium with its gammaproteobacterial symbiotic associate represents a new composite living being.
BCc, the primary endosymbiont of the aphid
(subfamily Lachninae), is losing its symbiotic capacity and might be replaced by the coresident “
Serratia symbiotica.” Phylogenetic and morphological analyses within the subfamily Lachninae indicate two different “
. Serratia symbiotica” lineages and support the longtime coevolution of both symbionts in