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Induced Abnormality In Mir- and Earth-Grown Super Dwarf WheatSuper-dwarf wheat grown on the Mir space station using the Svet "Greenhouse" exhibited morphological, metabolic and reproductive abnormalities compared with normal wheat. Of prominent importance were the abnormalities associated with reproductive ontogeny and the total absence of seed formation on Mir. Changes in the apical meristem associated with transition from the vegetative phase to floral initiation and development of the reproductive spike were all typical of 'Super Dwarf' wheat up to the point of anthesis. Observation of ruptured anthers from the Mir-grown plants revealed what appeared to be normally developed pollen. These pollen grains however, contain only one nucleus, while normal viable pollen is trinucleate. A potentially important difference in the flight experiment, compared with ground reference studies, was identified - a high level of atmospheric ethylene (1200 ppb). Ground studies conducted exposing "Super-dwarf" wheat to ethylene at just prior to anthesis resulted in manifestation of the same abnormalities observed in the space flight samples.
Document ID
20020054219
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Bubenheim, David L.
(NASA Ames Research Center Moffett Field, CA United States)
Stieber, Joseph
(Lockheed Martin Engineering and Sciences Co. Moffett Field, CA United States)
Campbell, William F.
(Utah State Univ. Logan, UT United States)
Salisbury, Frank B.
(Utah State Univ. Logan, UT United States)
Levinski, Margarita
(Institute of Biomedical Problems Moscow, USSR)
Sytchev, Vladimir
(Institute of Biomedical Problems Moscow, USSR)
Podolsky, Igor
(Institute of Biomedical Problems Moscow, USSR)
Chernova, Lola
(Institute of Biomedical Problems Moscow, USSR)
Ivanova, Irene
(Institute of Biomedical Problems Moscow, USSR)
Kliss, Mark
Date Acquired
August 20, 2013
Publication Date
January 1, 1998
Subject Category
Life Sciences (General)
Meeting Information
Meeting: 32nd COSPAR Scientific Assembly
Location: Nagoya
Country: Japan
Start Date: July 12, 1998
End Date: July 19, 1998
Sponsors: Committee on Space Research
Funding Number(s)
PROJECT: RTOP 188-47-01
Distribution Limits
Public
Copyright
Other

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