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Related to Circumnutation: polycotyledon


The bending or turning of a growing stem tip that occurs as a result of unequal rates of growth along the stem.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



movement by the apex of a growing stem or root of a plant resulting in a circular or elliptical configuration in a plan view. According to C. Darwin, who discovered the phenomenon, circumnutation is the simple form of autonomous movement in plants from which all other types of plant movement developed. Circumnutation has been observed in all plants studied for this purpose. It is thought that circumnutation in climbing plants is regulated by a certain balance between stimulators and inhibitors of growth.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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