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Inhibition of root elongation in microgravity by an applied electric fieldRoots grown in an applied electric field demonstrate a bidirectional curvature. To further understand the nature of this response and its implications for the regulation of differential growth, we applied an electric field to roots growing in microgravity. We found that growth rates of roots in microgravity were higher than growth rates of ground controls. Immediately upon application of the electric field, root elongation was inhibited. We interpret this result as an indication that, in the absence of a gravity stimulus, the sensitivity of the root to an applied electric stimulus is increased. Further space experiments are required to determine the extent to which this sensitivity is shifted. The implications of this result are discussed in relation to gravitropic signaling and the regulation of differential cell elongation in the root.
Document ID
Document Type
Reprint (Version printed in journal)
Wolverton, C.
(The Ohio State University Columbus 43210, United States)
Mullen, J. L.
Aizawa, S.
Yoshizaki, I.
Kamigaichi, S.
Mukai, C.
Shimazu, T.
Fukui, K.
Evans, M. L.
Ishikawa, H.
Date Acquired
August 21, 2013
Publication Date
December 1, 1999
Publication Information
Publication: Journal of plant research
Volume: 112
Issue: 1108
ISSN: 0918-9440
Subject Category
Life Sciences (General)
Distribution Limits
short duration
Flight Experiment
Non-NASA Center
NASA Discipline Plant Biology
STS-95 Shuttle Project

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