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Gravity-induced asymmetric distribution of a plant growth hormoneDolk (1936) demonstrated that gravistimulation induced an asymmetric distribution of auxin in a horizontally-placed shoot. An attempt is made to determine where and how that asymmetry arises, and to demonstrate that the endogenous auxin, indole-3-acetic acid, becomes asymmetrically distributed in the cortical cells of the Zea mays mesocotyl during 3 min of geostimulation. Further, indole-3-acetic acid derived by hydrolysis of an applied transport form of the hormone, indole-3-acetyl-myo-inositol, becomes asymmetrically distributed within 15 min of geostimulus time. From these and prior data is developed a working theory that the gravitational stimulus induces a selective leakage, or secretion, of the hormone from the vascular tissue to the cortical cells of the mesocotyl.
Document ID
19850065073
Document Type
Reprint (Version printed in journal)
Authors
Bandurski, R. S. (Michigan State Univ. East Lansing, MI, United States)
Schulze, A. (Michigan State Univ. East Lansing, MI, United States)
Momonoki, Y. (Michigan State University East Lansing, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1984
Publication Information
Publication: Physiologist, Supplement
Volume: 27
ISSN: 0031-9376
Subject Category
LIFE SCIENCES (GENERAL)
Funding Number(s)
CONTRACT_GRANT: NSF PCM-82-04017
CONTRACT_GRANT: NAGW-97
Distribution Limits
Public
Copyright
Other