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Springback in root gravitropismConditions under which a gravistimulus of Merit corn roots (Zea mays L.) is withdrawn result in a subsequent loss of gravitropic curvature, an effect which we refer to as springback.' This loss of curvature begins within 1 to 10 minutes after removal of the gravistimulus. It occurs regardless of the presence or absence of the root cap. It is insensitive to inhibitors of auxin transport (2,3,5-triiodobenzoic acid, naphthylphthalamic [correction of naphthylphthalmaic] acid) or to added auxin (2,4-dichlorophenoxyacetic acid). Springback is prevented if a clinostat treatment is interjected to neutralize gravistimulation during germination, which suggests that the change in curvature is a response to a memory' effect carried over from a prior gravistimulation.
Document ID
20040112078
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Leopold, A. C.
(Boyce Thompson Institute, Cornell University Ithaca, New York 14853)
Wettlaufer, S. H.
Date Acquired
August 21, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Plant physiology
Volume: 91
ISSN: 0032-0889
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-3
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Plant Biology
NASA Program Space Biology
NASA Discipline Number 29-20
Non-NASA Center

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