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auxin
(redirected from Auxins)

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.04 sec.
aux·in  (ôksn)
n.
Any of several plant hormones that regulate various functions, including cell elongation.

[From Greek auxein, to grow; see aug- in Indo-European roots.]

aux·inic adj.
aux·ini·cal·ly adv.

auxin  (ôksn)
Any of various hormones or similar substances that promote and regulate the growth and development of plants. Auxins are produced in the meristem of shoot tips and move down the plant, causing various effects. Auxins cause the cells below the shoot apex to expand or elongate, and this (rather than cell division) is what causes the plant to increase in height. In woody plants, auxins also stimulate cell division in the cambium, which produces vascular tissue. Auxins inhibit the growth of lateral buds so that the plant grows upwards more than outwards. They can be produced artificially in laboratories for such purposes as speeding plant growth and regulating how fast fruit will ripen.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.auxin - a plant hormone that promotes root formation and bud growth
growth regulator, phytohormone, plant hormone - (botany) a plant product that acts like a hormone
IAA, indoleacetic acid - a plant hormone promoting elongation of stems and roots
indolebutyric acid - a synthetic plant hormone promoting elongation of stems and roots

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Natural cytokinins and auxins, along with hormones and vitamins, increase plant growth and yield, strengthen stems, and improve seed germination.
Then researchers demonstrated they could make such blobs of tissue grow into either roots or shoots depending on the ratio of two critical plant hormones, auxins and cytokinins.
In addition, amino acids and naturally occurring growth hormones - cytokinins, giberellins, and auxins - are present in the seaweed extract.
 
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