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Growth or movement toward O2.
Botany A plant root’s growth away from the natural direction due to the action of O2 or other gases.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


Movement of an organism with respect to a supply of air or oxygen.
[aero- + tropism]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


plant growth response affected by the presence of air. For example, negative aerotropism is growth away from air, an example of which is the growth of the POLLEN TUBE from the stigma to the ovary in flowering plants.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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