gravitropism
Americannoun
-
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).
-
Biology. a similar pattern of orientation common among species of fungi and single-celled organisms.
Other Word Forms
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Auxins are the main hormones responsible for cell elongation in phototropism and gravitropism.
From Textbooks ● Jun. 9, 2022
Without gravitropism, roots would grow in all directions but seedlings would not grow upward toward the surface.
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
Without gravitropism, roots would grow upward but seedlings would not grow upward toward the surface.
From Textbooks ● Jun. 9, 2022
Without gravitropism, both roots and seedlings would grow upward.
From Textbooks ● Jun. 9, 2022
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
