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The influence of variable gravitational fields on the embryonic development of some ecaudate amphibians
V V Popov1, L R Palmbakh, E V Kuznetsov
1USSR, Academy of Sciences, Moscow, USSR.
Abstract:
The fertilized eggs of the frog Rana temporaria immediately after fertilization were rotated on a clinostat in the vertical plane at the rate of 0.66 rotations per minute with a radius of 20 mm for 2.5 hours. A wide spectrum of developmental anomalies was found (33% in the experiment, 14% in the control) which, in the authors' opinion, result from abnormalities in the cortical reaction of symmetrization. These abnormalities manifest themselves in the irregular distribution of cortical pigment and in eccentric division lines.
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