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A plant hormone that promotes root formation and bud growth
Answer for the clue "A plant hormone that promotes root formation and bud growth ", 5 letters:
auxin
Alternative clues for the word auxin
Word definitions for auxin in dictionaries
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
auxin \aux"in\ n. 1. a substance which, in small concentrations, promotes root formation, bud growth, or certain other processes such as fruit ripening or leaf drop in plants.
Wikipedia
Word definitions in Wikipedia
Auxins (plural of auxin ) are a class of plant hormones (or plant growth substances) with some morphogen -like characteristics. Auxins have a cardinal role in coordination of many growth and behavioral processes in the plant's life cycle and are essential ...
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
plant growth hormone, 1934, from German (1931), from Greek auxein "to increase" (see augment ) + chemical suffix -in (2).
WordNet
Word definitions in WordNet
n. a plant hormone that promotes root formation and bud growth
Wiktionary
Word definitions in Wiktionary
n. (context botany English) A class of plant growth substance (often called phytohormones or plant hormones) which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.
Usage examples of auxin.
In the same way, auxins will concentrate on the lower side of a stem held horizontally, curving the tip upward.
One of the most powerful of the auxins was discovered through studies of a plant disease.
Geotropism seems also to be mediated by auxins, but how the distribution of auxins can be affected by gravity is not yet understood.
The best-known of these auxins is a compound called indolyl-^-acetic acid, commonly abbreviated 7AA.
Many of the movements of plants are governed by the distribution of these auxins.
One of the most powerful of the auxins was discovered through studies of a plant disease.
Many synthetic compounds have been shown to have auxin activity and are commercially available, such as napthaleneacetic acid (NAA), indolebutyric acid (IBA), and 2,4-dichlorophenoxyacetic acid (2,4 DPA), but only indoleacetic acid has been isolated from plants.
Natural plant growth substances such as auxins, cytokinins, and gibberellins are certainly responsible for the control of root initiation and the rate of root for- mation.
Starch levels drop, strengthening tissues and fibers begin to soften, cell wall thickness decreases, vascular tissue is diminished, auxin levels rise, and undifferentiated tissue begins to form.