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[The growth movements of moss protonemata under clinostatic and microgravity conditions]Populations of dark-grown protonemata of moss Ceratodon purpureus wt-4 (Germany) and wt-U (Ukraine) were rotated on clinostat or flown in space (experiment "Protonema" aboard Bion-11, December 24, 1996-January 7, 1997) to determine the effects of altered gravity on orientation of protonemata growing filaments. Protonemata had been cultivated 8 days in vertical stationary position at dark to be transported to microgravity or placed in clinostat for the period of 14 days. In the ground control, protonemata demonstrated the negatively gravitropic growth (straight upwards in a bundle of compact filaments). The horizontal or circular rotation in clinostat and exposure to microgravity made filaments grow every each way within the substrate plane but with an apparent trend to rightward curling resulting in "spiral galaxies".
Document ID
20040141830
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Demkiv, O. T.
Kordium, E. L.
Tairbekov, M. G.
Sack, F.
Kern, F.
Kardash, A. R.
Date Acquired
August 22, 2013
Publication Date
January 1, 1999
Publication Information
Publication: Aviakosmicheskaia i ekologicheskaia meditsina = Aerospace and environmental medicine
Volume: 33
Issue: 3
ISSN: 0233-528X
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Plant Biology
Flight Experiment
Bion 11 Project
unmanned
short duration
Non-NASA Center

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