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Related to Indole-3-acetic acid: auxin


C10H9O2N A plant growth hormone with an indole skeleton.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



also β-indolylacetic acid, C10H9NO2, a highly physiologically active chemical compound, formed in plants and affecting growth processes (the so-called growth hormone); one of the most widely distributed auxins.

The Dutch chemist F. Kögl and his co-workers first isolated heteroauxin in 1934 from cultures of molds and other microorganisms; later it was also discovered in higher plants. It is formed in leaves from the amino acid tryptophan and then migrates to the growing stems and roots of plants, where it is oxidized to an active state. Heteroauxin is the only auxin prepared synthetically. The comparative simplicity of synthesizing it facilitated study of the action of heteroauxin on the plant organism, as well as its use in horticulture, for example, for accelerating the formation of roots when propagating plants by cuttings. (It is often used along with vitamin C and the B vitamins.) The heteroauxin doses vary from 50 to 200 mg per liter depending on the degree of lignification of the plant propagated by cuttings.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
GC-MS analysis showed that the mass fragment patterns of metabolites I, II, and III corresponded to those of authentic standards of indole-3-acetic acid, indole-3-glyoxylic acid, and indole-3-aldehyde, respectively (Figure 3).
Bacterial biosynthesis of indole-3-acetic acid. Canadian Journal of Microbiology.
(pmol/ml) 1.20 2.43 3.71 5.66 Root length (cm) 0.40 1.04 2.53 4.80 Table 3: Indole-3-acetic acid (IAA) production by isolated bacterial strains ([micro]g [ml.sup.-1] filtrate) Origin Bacterial strains IAA ([micro]g/ml filtrate) Wheat rhizosphere Bacillus lentus AK1 1.45 Wheat rhizosphere Bacillus sp.
1999 Aerobic oxidation of indole-3-acetic acid catalyzed by anionic and cationic peanut peroxidase.
Heteroauxin also means "other auxin," which is known today as indole-3-acetic acid (IAA).
Lebuhn M, Hartmann A (1993) Method for determination of indole-3-acetic acid and related compounds of L-tryptophan catabolism in soils.
Production of indole-3-acetic acid (IAA), a key physiological feature of heterotrophic and enteric plant growth-promoting (PGP) rhizosphere assemblages associated with freshwater macrophyte Juncus effusus L.
Suprava, Turia local, Suruchi and [V.sub.3][S.sub.18] was achieved on half-strength basal Murashige and Skoog's medium supplemented with 0.5-1.0 mg/l either indole-3-acetic acid (IAA) or indole-3-butyric acid (IBA) and 2% (w/v) sucrose within 7-9 days of culture.
Key words: Indole-3-acetic acid, Synthesis, 1,1-carbonyldiimidazole (CDI), Acetamides, Pyridine.
The ethyl acetate fractions of the cell free culture broth of NKPRPPNSB isolates were used for Indole-3-acetic acid quantification by HPLC.