Synergistic Fruiting Body Construction by Polysphondylium violaceum Mutants

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Abstract
Of the 40 mutants tested, only 3 pairs produced fruiting bodies of wild-type morphology, although partial synergism was seen in 6 other combinations. Of the 3 fully synergistic combinations, two paired an aggregateless mutant (agg96) with a slug-forming partner and one paired a slug-forming mutant with the abnormally fruiting mutant (fab66). No complete synergism was observed between mutants of similar terminal phenotypes. It is thought that the ability of Dictyostelium discoideum and D. purpureum to form synergistic fruiting bodies in appropriate combinations is directly related to the early divergence of prespore and prestalk populations and that P. violaceum fails to synergize effectively because this early differentiation does not occur.

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