apical meristem
Americannoun
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A meristem at the tip of a plant shoot or root that produces auxin and causes the shoot or root to increase in length. Growth that originates in the apical meristem is called primary growth. In vascular plants, the apical meristem produces three kinds of primary meristems: the protoderm, ground meristem, and procambium. These in turn produce primary tissues.
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See more at meristem
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.
BBM encodes a transcription factor that regulates embryonic development, while WUS encodes a transcription factor that maintains stem cell identity in the shoot apical meristem region.
From Science Daily ● May 1, 2024
Another effect of ABA is to promote the development of winter buds; it mediates the conversion of the apical meristem into a dormant bud.
From Textbooks ● Jun. 9, 2022
Just in front of it lies the polychate worm version of the apical meristem in plants: a place where stem cells continuously generate new body parts called the posterior growth zone.
From Scientific American ● Aug. 8, 2021
Primary growth adds length or height, mediated by apical meristem tissue at the tips of roots and shoots—which is difficult to show clearly in cross-sectional diagrams.
From Textbooks ● Jan. 1, 2015
The apical meristem is made of undifferentiated cells that continue to proliferate throughout the life of the plant.
From Textbooks ● Jan. 1, 2015
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.
