NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
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 Earth-grown 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 gains, however, contained only one nuclei, while normal viable pollen is tri-nucleate. A potentially important difference in the flight experiment, compared with ground reference studies, was the presence of a high level of atmospheric ethylene (1,200 ppb). Ground studies conducted by exposing 'Super-Dwarf' wheat to ethylene just prior to anthesis resulted in manifestation of the same abnormalities observed in the space flight samples. c2002 Published by Elsevier Science Ltd on behalf of COSPAR.
Document ID
20040087851
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bubenheim, D. L.
(NASA Ames Research Center Moffett Field CA United States)
Stieber, J.
Campbell, W. F.
Salisbury, F. B.
Levinski, M.
Sytchev, V.
Podolsky, I.
Chernova, L.
Pdolsky, I.
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Advances in space research : the official journal of the Committee on Space Research (COSPAR)
Volume: 31
Issue: 1
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
long duration
NASA Discipline Plant Biology
NASA Experiment Number 284093 1/2
Flight Experiment
Non-NASA Center
manned
Mir Project

Available Downloads

There are no available downloads for this record.
No Preview Available