INTERNATIONAL INSTITUTE
OF BIOPHYSICS
Conference
on Biophotons 1999
Abstracts of the Conference Reports in
alphabetic Order
DISTANT OPTICAL INTERACTIONS BETWEEN THE DEVELOPING FISH EMBRYOS
A.B. Burlakov
Faculty of Biology, Moscow State University Moscow 119899 Russia
Eggs and embryos of a fish, Misgurnus fossilus L., maintained
in the mutually isolated quartz and glass cuvettes and having only optical
contacts with each other demonstrated significant changes in their developmental
rates and/or an increased percent of malformations and mortality when compared
with the similar control samples. The results of the distant interactions
passing via quartz plates appeared to be much more pronounced than those
passing through glass plates. They were also largely dependent upon the
age differences between interacting samples. If these differences were
enough considerable the more advanced samples inhibited as a rule the development
of their younger partners. Meanwhile in the cases of small age differences
one could trace a stimulation of the development of a retarded group and
its synchronization with that of an advanced group. The biological effects
of an optical interaction also depended upon:
- Mutual orientation of the interacting batches. Namely, the embryos
situated in the same plane effectively interacted with each other only
if their body axes were oriented parallel to each other. For the different
stage embryos the arrangement in the mutually parallel planes was optimal.
- Exposure time. The significant interaction effects could be traces
under no less than 4 h exposures. The rate of mortality was the greatest
(up to 90-98%) under 24 h exposures.
The optical interactions are mediated by the different wave lengths
of a visible, UV and IR spectral ranges. Insertion of the optical and polarizing
filters (including those of a biological origin) modifies the results of
the optical interactions.
© International
Institute of Biophysics 2001 E-mail: iib@lifescientists.de
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