2018
DOI: 10.1101/305458
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A Freeloader?: The Highly Eroded Yet large Genome of theSerratia symbioticasymbiont ofCinara strobi

Abstract: Genome reduction is pervasive among maternally-inherited bacterial endosymbionts. This genome reduction can eventually lead to serious deterioration of essential metabolic pathways, thus rendering an obligate endosymbiont unable to provide essential nutrients to its host. This loss of essential pathways can lead to either symbiont complementation (sharing of the nutrient production with a novel co-obligate symbiont) or symbiont replacement (complete takeover of nutrient production by the novel symbiont). Howev… Show more

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“…Therefore, while endosymbiont clearance is a host-dependent process 20 , endosymbiont proliferation seems to escape host control. Symbiotic interactions are constantly evolving, in a continuum ranging from parasitism to mutualism, depending on changes in the interacting species and in their environment [27][28][29][30][31] . In insects, endosymbiont acquisition generally starts with domestication of parasites or commensals 32 .…”
Section: Discussionmentioning
confidence: 99%
“…Therefore, while endosymbiont clearance is a host-dependent process 20 , endosymbiont proliferation seems to escape host control. Symbiotic interactions are constantly evolving, in a continuum ranging from parasitism to mutualism, depending on changes in the interacting species and in their environment [27][28][29][30][31] . In insects, endosymbiont acquisition generally starts with domestication of parasites or commensals 32 .…”
Section: Discussionmentioning
confidence: 99%