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Reproductive Ontogeny of Wheat Grown on the Mir Space Station
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English
Abstract
The reproductive ontogeny of ‘Super-Dwarf’ wheat grown on the space station Mir is chronicled from the vegetative phase through flower' development. Changes in the apical meristem associated with transition from the vegetative plhase to floral initiation and development of the reproductive spike were all typical of ‘Super Dwarf’ wheat up to the point of anthesis. Filament elongation, which characteristically occurs just prior to anthesis (during floral development stage 4) and moves the anthers through the stigmatic branches thus facilitating pollination, did not occur in the flowers of spikes grown on Mir. While pollen did form in the anthers, no evidence of pollination or fertilization was observed. Analysis of pollen idlentified abnormalities; the presence of only one nucleus in the pollen as opposed to the normal trinucleate condition is likely an important factor in the sterility observed in wheat grown on Mir. While development of spikes on tillers typically occurs later than that of spikes on the main stem, all flowers appear to be arrested at the same developmental point. This strongly suggests that an environmental stress such as drought was not responsible for the lack of anthesis; similarity with ground study results suggest that atmospheric contamination may have suppressed critical developmental processes during stage 4 of floral development.
Authors
- David L. Bubenheim - NASA Ames Research Center
- Joseph Stieber - NASA Ames Research Center
- William Campbell - Utah State University
- Frank B. Salisbury - Utah State University
- Margarita Leviskikh - Institute of Biomedical Problems
- Vladimir N. Sytchev - Institute of Biomedical Problems
- Irene Ivanova - Institute of Biomedical Problems
- Igor Podolsky - Institute of Biomedical Problems
Citation
Bubenheim, D., Stieber, J., Campbell, W., Salisbury, F. et al., "Reproductive Ontogeny of Wheat Grown on the Mir Space Station," SAE Technical Paper 981552, 1998, https://doi.org/10.4271/981552.Also In
References
- Bingham. G. Salisbury F. Campbell W. Carmen J. Bubenheim D.L. Yendler B. Sytchev V. Berkovich Y. Levinskikh M. Podolsky I. 1996 “Greenhouse- I” Experiment. Adv. Space.Res. 18 225 232
- Frederick, A.B. Morgan P.W. Saltveit, M.E. Jr. 1992 Ethylene in Plant Biology Academic Press, Inc. San Diego
- GOSS, J.A. 1968 Development, Physiology and Biochemistry of Corn and Wheat Pollen. Bot. Rev. 34 333 358
- Halstead, T.W. Dutcher F.R. 1987 Plants in Space Ann. Rev. Pl. Physiol. 38 317 345
- Lucas. D. 1972 The Effect of Daylength of Primordia Production of the Wheat Apex. Aust. J. Biol. Sci. 25 649 656