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Plastids: dynamic components of plant cell developmentThe gravitropic bending of maize roots, as a response to reorientation of the root within a gravitational field, was examined for sensitivity to exogenous applications of the cytoskeletal inhibitor, cytochalasin D. Agar blocks were impregnated with this inhibitor, and were applied either to the root cap or to the zone of root cell elongation. Root growth was normal with either treatment, if the roots were not repositioned with respect to the gravitational vector. When untreated roots were placed in a horizontal position with respect to gravity, a 40 degree bending response was observed within one hour. This bending also occurred when cytochalasin D was applied at high concentrations to the zone of root cell elongation. However, when cytochalasin D above 40 micrograms/ml was applied to the root cap, roots lost the ability of directional reorientation within the gravitational field, causing a random bending.
Document ID
20040090239
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Guikema, J. A.
(Kansas State University Manhattan 66502, United States)
Gallegos, G. L.
Spooner, B. S.
Date Acquired
August 21, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Transactions of the Kansas Academy of Science
Volume: 95
Issue: 2-Jan
ISSN: 0022-8443
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-2328
CONTRACT_GRANT: NAGW-1197
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Cell Biology
NASA Discipline Developmental Biology
NASA Discipline Number 93-10
NASA Program NSCORT
Non-NASA Center

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