Induction of fruiting in two aggregateless mutants of Dictyostelium discoideum

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Abstract

Five general groups of morphogenetically aberrant mutants of Dictyostelium discoideum were isolated. Each group of mutants was characterized either by the absence of any fruiting structures or by the formation of abnormal fructifications. Among these developmental mutants were two aggregateless isolates, Agg--1 and Agg--2, that could be induced to form normal sorocarps under certain conditions. Sorocarps of the normal D. discoideum type were formed when growing myxamoebae from either of these mutants were allowed to come in contact with myxamoebae of the other mutants, wild-type D. discoideum, D. purpureum, or D. mucoroides. No sorocarps were formed when myxamoebae of Agg--1 and Agg--2 were paired. These two aggregateless mutants, while incapable of aggregating or fruiting when cultivated singly with Escherichia coli B/r on a glucose-salts medium, formed normal fruiting structures after being freed of what appeared to be a product of bacterial growth. The spores produced by Agg--1 and Agg--2 myxamoebae again gave rise to aggregateless clones of the original parental types. © 1971.

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Weber, A. T., & Raper, K. B. (1971). Induction of fruiting in two aggregateless mutants of Dictyostelium discoideum. Developmental Biology, 26(4), 606–615. https://doi.org/10.1016/0012-1606(71)90143-6

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