Gravitropism
| Definition: |
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) |
| Notes: |
directional growth of a plant in response to gravity |
| Also Called: |
Geotropism |
Gravitropism Definitions and Terms
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