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Nutations of sunflower seedlings on tilted clinostatsThe kinetics of hypocotyl nutations in Helianthus annuus L. were measured on plants which were rotated on clinostats with axes of rotation inclined at various angles, alpha, away from the vertical. The g-force component acting in the direction of the plant axis was taken as g cos alpha. The average period and average amplitude of nutation were constant for all such axially directed g-forces between 1.0 and 0.2 g (vertical to about 80 inclination). On the horizontal clinostat (90 inclination) nutation was neither initiated nor sustained. The g-force just sufficient fully to activate nutational oscillations should be sought for g-force parameter values ranging from 0 to 0.2.
Document ID
19780031300
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Brown, A. H.
(University City Science Center Philadelphia, Pa., United States)
Chapman, D. K.
(Pennsylvania, University Philadelphia, Pa., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Life Sciences (General)
Meeting Information
Meeting: Open Meeting of the Working Group on Space Biology
Location: Philadelphia, PA
Start Date: June 8, 1976
End Date: June 19, 1976
Accession Number
78A15209
Funding Number(s)
CONTRACT_GRANT: NGR-39-030-010
CONTRACT_GRANT: NGR-39-010-149
Distribution Limits
Public
Copyright
Other

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