Cellular differentiation and proliferation in corn roots grown in microgravity (Biocosmos 1985)

A cytological study was performed on Maize roots (Zea mays) which were grown in space (flight Biocosmos 1985) and on control roots on earth. Two criteria were selected: cell elongation in the cortical zone in the four mm of the extremity of the root and mitotic activity of the meristem. The results...

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Bibliographic Details
Published inAdvances in space research Vol. 6; no. 12; p. 157
Main Authors Darbelley, N, Driss-Ecole, D, Perbal, G
Format Journal Article
LanguageFrench
Published England 1986
Subjects
Cell Differentiation
Cell Division
Meristem - cytology
Meristem - growth & development
Meristem - physiology
Microscopy, Electron
Mitosis
Plant Root Cap - cytology
Plant Root Cap - growth & development
Plant Root Cap - physiology
Plant Root Cap - ultrastructure
Plant Roots - cytology
Plant Roots - growth & development
Plant Roots - physiology
Plant Roots - ultrastructure
Space Flight
Weightlessness
Zea mays - cytology
Zea mays - growth & development
Zea mays - physiology
Zea mays - ultrastructure
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Summary:A cytological study was performed on Maize roots (Zea mays) which were grown in space (flight Biocosmos 1985) and on control roots on earth. Two criteria were selected: cell elongation in the cortical zone in the four mm of the extremity of the root and mitotic activity of the meristem. The results show that in microgravity the length of the meristem is reduced of 1/3 and that its mitotic activity increases of about twofold comparatively to the synchronous control. In parallel the cell differentiation begin closer to the root cap junction. These results are discussed relative to the influence of gravistimulation on cell proliferation and cell differentiation in roots.
ISSN:0273-1177