A New Concept for the Taxonomy of the Family Dictyosteliaceae (Cellular Slime Molds)

Traub, Franz; Hohl, Hans R.

doi:10.1002/j.1537-2197.1976.tb11854.x

Cited by 19 publications

(11 citation statements)

References 26 publications

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“…In addition to large size, group 4 displays other distinguishing features, such as formation of cellular support structures, loss of individual encystation, loss of spore granules, and the use of cAMP as attractant. The correlation of the latter two traits was also noted earlier by Traub and Hohl 31. These workers also associated the presence of polar granules with a tendency to form clustered and/or branched sorocarps and a tendency for those sorocarps to be smaller than in species without polar granules, both of which are borne out by the recent analysis.…”

Section: Molecular Phylogeny and Evolution Of Morphology In The Sociasupporting

confidence: 78%

Evolution of size and pattern in the social amoebas

Schaap

2007

BioEssays

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A fundamental goal of biology is to understand how novel phenotypes evolved through changes in existing genes. The Dictyostelia or social amoebas represent a simple form of multicellularity, where starving cells aggregate to build fruiting structures. This review summarizes efforts to provide a framework for investigating the genetic changes that generated novel morphologies in the Dictyostelia. The foundation is a recently constructed molecular phylogeny of the Dictyostelia, which was used to examine trends in the evolution of novel forms and in the divergence of genes that shape these forms. There is a major trend towards the formation of large unbranched fruiting bodies, which is correlated with the use of cyclic AMP (cAMP) as a secreted signal to coordinate cell aggregation. The role of cAMP in aggregation arose through co-option of a pathway that originally acted to coordinate fruiting body formation. The genotypic changes that caused this innovation and the role of dynamic cAMP signaling in defining fruiting body size and pattern throughout social amoeba evolution are discussed. BioEssays 29:635–644, 2007. © 2007 Wiley Periodicals, Inc.

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Section: Molecular Phylogeny and Evolution Of Morphology In The Sociasupporting

confidence: 78%

Evolution of size and pattern in the social amoebas

Schaap

2007

BioEssays

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“…Perhaps its ability to form microcysts quickly and escape through time in this manner when confronted with adverse environmental conditions or competition from other species is an important tactic. While other slime molds can form these structures, it appears, at least under laboratory conditions, that P. pallidum can do it most readily (Traub and Hohl 1976).…”

Section: Discussionmentioning

confidence: 99%

The Relationship Between Cellular Slime Molds and Bacteria in Forest Soil

Kuserk¹

1980

Ecology

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Observations of natural and manipulated populations were used to investigate the regulation of population sizes and community structure in a group of soil amoebae, the cellular slime molds (Dictyosteliida). Correlations of slime mold abundance and distributional patterns with soil bacteria in the field suggest that food supply is a potential factor in the regulation of these species' numbers. One species, Dictyostelium mucoroides, responds most visibly to seasonal changes, spring and fall being peak seasons. When total slime mold number are partitioned into active and encysted forms, amoebae account for as much as 51% and 24% of the population in the fall and spring, respectively, vs. only 10—12% of the population during the summer and winter months. Large additions of various bacteria to field plots caused significant increases in D. mucoroides numbers. Moreover, the ability of this species to respond to a second addition of bacteria, made several days later, depended on its density. High—density populations failed to respond to additional food, whereas those which had already returned to base levels showed increases. These findings support the hypotheses that cellular slime molds are food limited in nature, and that community diversity is due, at least in part, to differential resource utilization by the species in nature.

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“…Isolation of D. aureum or D. aureum-like cellular slime molds has been reported previously only from dung collected in Puerto Rico (Olive, 1901), from seasonal evergreen forest soil in Mexico (Cavender and Raper, 1968), and from forest soils in Switzerland (Traub and Hohl, 1976) . Isolation of D. aureum or D. aureum-like cellular slime molds has been reported previously only from dung collected in Puerto Rico (Olive, 1901), from seasonal evergreen forest soil in Mexico (Cavender and Raper, 1968), and from forest soils in Switzerland (Traub and Hohl, 1976) .…”

mentioning

confidence: 97%

“…The rarely reported D. aureum was well represented in southern California, occurring in coastal and Joshuatree woodland communities. Isolation of D. aureum or D. aureum-like cellular slime molds has been reported previously only from dung collected in Puerto Rico (Olive, 1901), from seasonal evergreen forest soil in Mexico (Cavender and Raper, 1968), and from forest soils in Switzerland (Traub and Hohl, 1976) . The ubiquitous Polysphondylium pallidum demonstrated locally that it is a very tolerant form.…”

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confidence: 97%

The Distribution of Dictyostelid Cellular Slime Molds in Southern California with Taxonomic Notes on Selected Species

Benson

Mahoney

1977

American Journal of Botany

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The occurrence and distribution of Dictyostelid cellular slime molds in southern California were investigated by means of a clonal isolation technique that permitted quantitative sampling of populations. Thirteen species were isolated. These include (in approximate order of decreasing frequency): Dictyostelium rosarium Raper and Cavender, D. mucoroides Brefeld, D. sphaerocephalum (Oud.) Sacc. and March., D. aureum Olive, Polysphondylium pallidum Olive, D. minutum Raper, D. giganteum Singh, D. purpureum Olive, P. violaceum Brefeld, D. mucoroides variant, Acytostelium leptosomum Raper and Quinlan, D. polycephalum Raper, and a new species of Dictyostelium. D. rosarium and D. aureum, both rarely reported in the literature, were common and widespread. Trends in habitat preference of the Dictyostelids encountered are discussed. Selected taxonomic details are provided for D. rosarium, D. aureum and members of the “D. mucoroides complex“—D. mucoroides, D. sphaerocephalum, D. giganteum, and a D. mucoroides variant.

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A New Concept for the Taxonomy of the Family Dictyosteliaceae (Cellular Slime Molds)

Cited by 19 publications

References 26 publications

Evolution of size and pattern in the social amoebas

Evolution of size and pattern in the social amoebas

The Relationship Between Cellular Slime Molds and Bacteria in Forest Soil

The Distribution of Dictyostelid Cellular Slime Molds in Southern California with Taxonomic Notes on Selected Species

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