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Plant Physiology 93:1568-1572 (1990)
© 1990 American Society of Plant Biologists

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Environmental and Stress Physiology

Growth of the Cellular Slime Mold, Dictyostelium discoideum, Is Gravity Dependent

Yukishige Kawasaki, Takeshi Kiryu1, Kenji Usui1 and Hiroshi Mizutani

Mitsubishi-Kasei Institute of Life Sciences, 11 Minamiooya, Machida, Tokyo 194, Japan

The effect of artificial gravity on the growth of a microorganism, Dictyostelium discoideum, was studied and the following results were obtained: (a) Germination efficiency increased as gravity increased up to 3 gravities. (b) Cell differentiation was influenced by gravity. Retardation of spore formation or reduction in the spore fraction was observed at hypergravity. (c) Fruiting bodies were taller at hypergravity and smaller at simulated microgravity when compared at 1 gravity. It is suggested that modulation of gravity provides useful information on the mechanisms of life.

1 Department of Chemistry, Faculty of Sciences, Toho University, 2-2-1 Miyama, Funahashi, Chiba 274, Japan.






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Copyright © 1990 by the American Society of Plant Biologists