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The genus Aspergillus
A Manual of the Penicillia
DICTYOSTELIUM DISCOIDEUM , A NEW SPECIES OF SLIME MOLD FROM DECAYING FOREST LEAVES ' By
- K. Raper
Describing the amoeboid stage of some Myxomycètes as a new species, to review briefly its life cycle, and to discuss at some length the formation and behavior of certain structures not seen in other species is suggested.
Dictyostelium polycephalum n. sp.: a new cellular slime mould with coremiform fructifications.
- K. Raper
- BiologyJournal of General Microbiology
- 1 July 1956
D. polycephalum differs from previously known species of the genus, particularly for its formation of cell aggregates which give rise to varying numbers of long, thin migrating pseudo-plasmodia, and for the potential capacity of each to form subsequently a small coremiform fructification consisting of multiple sorocarps.
Penicillin: II. Natural Variation and Penicillin Production in Penicillium notatum and Allied Species.
Penicillin production is not a unique property of this mold, and it is now recognized that this capacity is present in varying degree in almost all strains of the PeniciUium notatum-chrysogenum group.
FONTICULA ALBA: A NEW CELLULAR SLIME MOLD (ACRASIOMYCETES)
Fonticula alba fits no presently recognized genus of the Acrasiomycetes, and myxamoebae that fail to aggregate differentiate individually as microcysts that grow and fruits well with Klebsiella pneumoniae upon weakly buffered nutrient agar.
ENCYSTMENT STAGES OF DICTYOSTELIUM
Two encystment stages of cellular slime molds belonging to the genus Dictyostelium are described and the myxamoebae that comprise the nascent macrocyst undergo limited differentiation and appear as polyhedral cells with highly refractive membranes.
Mating Types and Macrocyst Formation in Dictyostelium discoideum.
Strains of Dictyostelium discoideum were paired in various combinations. Certain pairings resulted in the production of macrocysts, which are thought to be the sexual stage in the cellular slime…
The Growth of Dictyostelium discoideum upon Pathogenic Bacteria
Species of the Dictyosteliaceae, a group of pseudoplasmodiumforming slime molds, are not uncommon in nature and can be readily isolated from soils, from decaying vegetation and from the dung of…