gravitropism
Americannoun
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Botany. Also geotropism. the directional pattern of growth that a plant experiences in response to gravity, as with a typical plant when the roots grow downward (positive gravitropism) and the stems grow upward (negative gravitropism).
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Biology. a similar pattern of orientation common among species of fungi and single-celled organisms.
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Shoots exhibit negative gravitropism, whereas roots exhibit positive gravitropism.
From Textbooks ● Jun. 9, 2022
Other hypotheses—involving the entire cell in the gravitropism effect—have been proposed to explain why some mutants that lack amyloplasts may still exhibit a weak gravitropic response.
From Textbooks ● Jun. 9, 2022
Apical dominance, seed germination, gravitropism, and resistance to freezing are all positively influenced by hormones.
From Textbooks ● Jun. 9, 2022
The mechanism that mediates gravitropism is reasonably well understood.
From Textbooks ● Jun. 9, 2022
Auxins also affect gravitropism, the response of a plant to gravity.
From Textbooks ● Jan. 1, 2018
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