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Influence of hook position on phototropic and gravitropic curvature by etiolated hypocotyls of Arabidopsis thalianaPhototropic and gravitropic curvature by hypocotyls of Arabidopsis thaliana is minimal when the side of the hook with the cotyledons attached is positioned toward the direction of tropistic curvature, and maximal when that side of the hook is positioned away from the direction of tropistic curvature. Based on these data, it is proposed that the position of the hook with attached cotyledons affects curvature and not stimulus perception. A randomly oriented population of plants exhibited considerable heterogeneity in tropistic curvature. This heterogeneity arises at least in part from the dependence of curvature on the position of the hook.
Document ID
20040112081
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Khurana, J. P.
(Michigan State University-Department of Energy Plant Research Laboratory East Lansing 48824)
Best, T. R.
Poff, K. L.
Date Acquired
August 21, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Plant physiology
Volume: 90
ISSN: 0032-0889
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-882
CONTRACT_GRANT: DE-AC02-76ERO-1338
Distribution Limits
Public
Copyright
Other
Keywords
NASA Program Space Biology
NASA Discipline Plant Biology
NASA Discipline Number 29-20
Non-NASA Center

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