Document Detail


Influence of microgravity on cellular differentiation in root caps of Zea mays.
MedLine Citation:
PMID:  11539036     Owner:  NASA     Status:  MEDLINE    
Abstract/OtherAbstract:
We launched imbibed seeds of Zea mays into outer space aboard the space shuttle Columbia to determine the influence of microgravity on cellular differentiation in root caps. The influence of microgravity varied with different stages of cellular differentiation. Overall, microgravity tended to 1) increase relative volumes of hyaloplasm and lipid bodies, 2) decrease the relative volumes of plastids, mitochondria, dictyosomes, and the vacuome, and 3) exert no influence on the relative volume of nuclei in cells comprising the root cap. The reduced allocation of dictyosomal volume in peripheral cells of flight-grown seedlings correlated positively with their secretion of significantly less mucilage than peripheral cells of Earth-grown seedlings. These results indicate that 1) microgravity alters the patterns of cellular differentiation and structures of all cell types comprising the root cap, and 2) the influence of microgravity on cellular differentiation in root caps of Zea mays is organelle specific.
Authors:
R Moore; W M Fondren; C E McClelen; C L Wang
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  American journal of botany     Volume:  74     ISSN:  0002-9122     ISO Abbreviation:  Am. J. Bot.     Publication Date:  1987 Jul 
Date Detail:
Created Date:  1996-12-16     Completed Date:  1996-12-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370467     Medline TA:  Am J Bot     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1006-12     Citation Subset:  S    
Affiliation:
Department of Biology, Baylor University, Waco, Texas 76798, USA.
Space Flight Mission:
Flight Experiment; STS Shuttle Project; manned; short duration
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MeSH Terms
Descriptor/Qualifier:
Cell Differentiation / physiology
Golgi Apparatus / ultrastructure
Gravitropism / physiology
Mitochondria / ultrastructure
Organelles / ultrastructure
Plant Root Cap / cytology*,  physiology,  ultrastructure*
Plastids / ultrastructure
Seeds
Space Flight*
Weightlessness*
Zea mays / cytology*,  physiology,  ultrastructure
Investigator
Investigator/Affiliation:
R Moore / Baylor U, Waco, TX, Dept Biol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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