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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.


Movement of an organism with respect to a supply of air or oxygen.
[aero- + tropism]


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.
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