A one-dimensional pattern in the cellular slime mould Polysphondylium pallidum

Nature ◽  
1980 ◽  
Vol 286 (5775) ◽  
pp. 806-807 ◽  
Author(s):  
F. W. Spiegel ◽  
E. C. Cox
Keyword(s):  
Cellular Slime Mould ◽  
Slime Mould ◽  
One Dimensional ◽  
Polysphondylium Pallidum ◽  
Cellular Slime

Spots and stripes: the patterning spectrum in the cellular slime mould Polysphondylium pallidum

Development ◽  
1989 ◽  
Vol 105 (2) ◽  
pp. 323-333
Author(s):  
J.G. McNally ◽  
E.C. Cox
Keyword(s):  
Pattern Formation ◽  
Specific Antigen ◽  
Spherical Cell ◽  
The Novel ◽  
Cellular Slime Mould ◽  
Slime Mould ◽  
Size And Shape ◽  
Polysphondylium Pallidum ◽  
Cellular Slime ◽  
Pattern Determination

Whorls of the cellular slime mould Polysphondylium pallidum originate as spherical cell masses that during normal morphogenesis produce tips only at equidistant positions around their equator. We have observed a series of new patterns in whorls that differ from normal whorls only in that they are larger or more elongated. Among the novel patterns found were arrays of tips distributed fairly regularly over the whole whorl surface, as well as striped patterns detected at earlier stages with a tip-specific antigen. These altered patterns demonstrate that a whorl's size and shape are by themselves important factors in pattern determination. We have compared the range of observed patterns to those predicted by a variety of different theories. We find that while no one theory can account in detail for all of our observations, predictions based on Turing's scheme of pattern formation come the closest.

Ultrastructural Changes During Formation and Germination of Microcysts in Polysphondylium Pallidum, a Cellular Slime Mould

1970 ◽  
Vol 7 (1) ◽  
pp. 285-305
Author(s):  
H. R. HOHL ◽  
L. Y. MIURA-SANTO ◽  
D. A. COTTER
Keyword(s):  
Cyst Wall ◽  
Ultrastructural Changes ◽  
Cell Periphery ◽  
Cytoplasmic Matrix ◽  
Cellular Slime Mould ◽  
Slime Mould ◽  
Fibrillar Material ◽  
Polysphondylium Pallidum ◽  
Cellular Slime ◽  
Mature Cyst

Ultrastructural changes during encystation of Polysphondylium pallidum, a cellular slime mould, include an increase in fibrillar material in the cytoplasmic matrix, the formation of cytoplasmic microprojections at the cell periphery and the occurrence of tiny vesicles and some larger vacuoles near the cell periphery. The cyst wall appears first as a fluffy, loose network of fibrils. In the mature cyst it consists of a dense inner and a somewhat looser outer layer. It contains inclusions of apparently cytoplasmic origin. Electron-dense material lines the cell periphery beneath the plasma membrane. Excystment of the myxamoeba is accompanied by a swelling of aggregated vacuoles and polyvesicular bodies, the disappearance of the peripheral cytoplasmic lining, and a general loosening of the wall texture. For a limited period the cisternae of the rough endoplasmic reticulum appear highly dilated. The loosened wall eventually breaks and the myxamoeba emerges by extending pseudopodia through the rupture, leaving the entire cyst wall behind.

Trehalose in the Cellular Slime Mould Dictyostelium mucoroides

Nature ◽  
1961 ◽  
Vol 192 (4807) ◽  
pp. 1077-1078 ◽  
Author(s):  
JAMES S. CLEGG ◽  
MICHAEL F. FILOSA
Keyword(s):  
Cellular Slime Mould ◽  
Slime Mould ◽  
Cellular Slime

scholarly journals Growth of myxamoebae of the cellular slime mould Dictyostelium discoideum in axenic culture

1970 ◽  
Vol 119 (2) ◽  
pp. 171-174 ◽  
Author(s):  
D. J. Watts ◽  
J. M. Ashworth
Keyword(s):  
Cell Differentiation ◽  
Dictyostelium Discoideum ◽  
Axenic Culture ◽  
Axenic Medium ◽  
Cellular Slime Mould ◽  
Slime Mould ◽  
Solid Media ◽  
Cellular Slime

1. A simple axenic medium suitable for the growth of the myxamoebae of a strain of the cellular slime mould Dictyostelium discoideum is described. 2. Procedures suitable for the growth of this strain in liquid and on solid media are described. 3. Conditions suitable for initiating the cell differentiation of myxamoebae grown axenically are described.

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