Effects of angular speed in responses of Paramecium tetraurelia to hypergravity.
The paper shows the results of investigations carried out in a single cell organism. Paramecium tetraurelia exposed to different gravitational levels. Hypergravity resulted in a decrease in cell growth rate. The responses depend on g level and angular speed of the centrifuge; furthermore they depend also on small short fluctuations in g levels, delta g, due to the swimming of the cells inside the culture tubes. Delta g depends on angular speed and size of the holding device. The inhibitory effect of hypergravity, for the same angular speed, increases with respect of the diameter of the culture tubes.
Planel
H
H
Faculte de Medecine, Toulouse, France.
Richoilley
G
G
Caratero
C
C
Tixador
R
R
Caratero
A
A
Gasset
G
G
D000818:Animals; D002455:Cell Division; D002498:Centrifugation; D003312:Coriolis Force; D018471:Hypergravity; D016805:Paramecium tetraurelia / Q000166:cytology / Q000254:growth & development*; D012399:Rotation