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Interaction of light and gravitropism with nutation of hypocotyls of Arabidopsis thaliana seedlingsEtiolated seedlings of Arabidopsis thaliana nutated under conditions of physiological darkness while about ten percent of monitored individuals exhibited regular elliptical nutation, circumnutation. Pre-irradiation with red light prevented occurrence of circumnutation without having an effect on the average rate of the nutational movement. Phototropic response of seedlings to unilateral blue light appeared to be superimposed over nutation. Throughout gravitropism, some seedlings continued to exhibit nutation suggesting that these two processes are independently controlled. Based on these results, we suggest that nutation in Arabidopsis probably is not controlled by the mechanism predicted by the theory of gravitropic overshoots.
Document ID
20040089299
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Orbovic, V.
(Michigan State University East Lansing 48824-1312, United States)
Poff, K. L.
Date Acquired
August 21, 2013
Publication Date
November 1, 1997
Publication Information
Publication: Plant growth regulation
Volume: 23
Issue: 3
ISSN: 0167-6903
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: DE-FG02-90-ER20021
CONTRACT_GRANT: NAGW-882
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Plant Biology
Non-NASA Center

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