Physiologic Function
gravitropism
Subclass of:
Tropism
Definitions related to gravitropism:
  • The directional growth of organisms in response to gravity. In plants, the main root is positively gravitropic (growing downwards) and a main stem is negatively gravitropic (growing upwards), irrespective of the positions in which they are placed. Plant gravitropism is thought to be controlled by auxin (AUXINS), a plant growth substance. (From Concise Dictionary of Biology, 1990)
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • The orientation of plant parts under the stimulation of gravity.
    Gene Ontology Dictionary
    Gene Ontology Consortium, 2021
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