Symbiont location, host fitness, and possible coadaptation in a symbiosis between social amoebae and bacteria.

ABSTRACT: Recent symbioses, particularly facultative ones, are well suited for unravelling the evolutionary give and take between partners. Here we look at variation in natural isolates of the social amoeba Dictyostelium discoideum and their relationships with bacterial symbionts, Burkholderia hayleyella and Burkholderia agricolaris. Only about a third of field-collected amoebae carry a symbiont. We cured and cross-infected amoebae hosts with different symbiont association histories and then compared host responses to each symbiont type. Before curing, field-collected clones did not vary significantly in overall fitness, but infected hosts produced morphologically different multicellular structures. After curing and reinfecting, host fitness declined. However, natural B. hayl

SUBMITTER: Shu L 

PROVIDER: S-EPMC6336404 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature