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Title

Germination of Arabidopsis seed in space and in simulated microgravity: alterations in root cell growth and proliferation

AuthorsManzano, Ana I. ; Matía, Isabel ; González-Camacho, Fernando ; Carnero-Díaz, Eugénie; van Loon, Jack JWA; Dijkstra, Camelia E.; Larkin, Oliver J.; Anthony, Paul; Davey, Michael R.; Marco, Roberto ; Medina, F. Javier
KeywordsArabidopsis thaliana
Cell proliferation
Cell cycle
Cell growth
Nucleolus
Nucleolin
International Space Station (ISS)
Random Positioning Machine (RPM)
Magnetic levitation
Microgravity
GUS
Electron microscopy
Immunogold
Issue DateNov-2009
PublisherSpringer
CitationMicrogravity Science and Technology 21(4): 293-297 (2009)
AbstractChanges have been reported in the pattern of gene expression in Arabidopsis on exposure to microgravity. Plant cell growth and proliferation are functions that are potentially affected by such changes in gene expression. In the present investigation, the cell proliferation rate, the regulation of cell cycle progression and the rate of ribosome biogenesis (this latter taken to estimate cell growth) have been studied using morphometric markers or parameters evaluated by light and electron microscopy in real microgravity on the International Space Station (ISS) and in ground-based simulated microgravity, using the Random Positioning Machine and the Magnetic Levitation Instrument. Results showed enhanced cell proliferation but depleted cell growth in both real and simulated microgravity, indicating that the two processes are uncoupled, unlike the situation under normal gravity on Earth in which they are strictly co-ordinated events. It is concluded that microgravity is an important stress condition for plant cells compared to normal ground gravity conditions
Description5 páginas -- PAGS nros. 293-297
Publisher version (URL)http://dx.doi.org/10.1007/s12217-008-9099-z
URIhttp://hdl.handle.net/10261/54008
DOI10.1007/s12217-008-9099-z
ISSN0938-0108
E-ISSN1875-0494
Appears in Collections:(CIB) Artículos
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