Columella cells of seedlings of Zea mays L. cv. Bear Hybrid grown in the microgravity of orbital flight allocate significantly larger relative-volumes to hyaloplasm and lipid bodies, and significantly smaller relative-volumes to dictyosomes, plastids, and starch than do columella cells of seedlings grown at I g. The ultrastructure of columella cells of seedlings grown at I g and on a rotating clinostat is not significantly different. However, the ultrastructure of cells exposed to these treatments differs significantly from that of seedlings grown in microgravity. These results indicate that the actions of a rotating clinostat do not mimic the ultrastructural effects of microgravity in columella cells of Z. mays.
|Original language||English (US)|
|Number of pages||4|
|Journal||Annals of Botany|
|State||Published - Feb 1990|
Bibliographical noteFunding Information:
This research was supported by grant number NAGW-1738 from the National Aeronautics and Space Administration (NASA) and by a grant from the Research Incentive Program of Wright State University. I thank Eddie McClelen for his excellent technical assistance.
- Space biology
- Space shuttle
- Zea mays L.