Indoleacetic acid regulation

H-Indole, 3,3-dichloro-synthesis, 4, 369 3H-Indole, 3,3-dimethyl-synthesis, 4, 224 3H-Indole, 3-hydroperoxy-autoxidation, 4, 247 rearrangement, 4, 249 3H-Indole, 3-oximino-synthesis, 4, 209, 210 3H-Indole, 3-oximino-2-phenyl Beckmann rearrangement, 4, 210 Indoleacetic acid synthesis, 4, 337 Indole-3-acetic acid as growth regulator, 4, 372 synthesis, 4, 346 Indole alkaloids, 4, 373 synthesis, 4, 276... 

Indoleacetic Acid 175.19 Plant growth regulator. Heteroauxin... 

The work of many investigators soon showed it to be extremely widespread in plants, and it became clear that it was a fundamental plant hormone (e.g., reviews 530, 655a). Excessive production of indoleacetic acid by parasites is responsible for certain types of plant tumor (e.g., 948). The synthetic plant growth regulators, which are in general substituted phenoxyacetic acids, probably function as indoleacetic acid analogues. 

Indoleacetic acid (4.82), one of the natural growth-regulators of plants, is an example of a substance whose powerful action is abolished by the insertion of a methyl-group in the 2-position. On the other hand, in the K family of vitamins, e.g. menaphthone (2.33), the presence of a methyl-group in the 2-position is absolutely essential for biological activity (see also below). 

Kosuge, T. and M. Sanger, Indoleacetic acid, its synthesis and regulation A basis for tumorigenicity in plant disease, in The Shikimic Acid Pathway (E. E. Conn, ed.). Recent Advances in Phytochemistry Vol. 20 147-161, Plenum Press, New York, 1986. 

L-Tryptophan derivatives 3-Indoleacetic acid (D 21) and related compounds, e.g., indoleacetoni-trile (D 9.4) Plants (Apical meristems of stems and roots) Regulation of various growth and developmental processes (auxin activity)... 

INDOLEACETIC ACID, ITS SYNTHESIS AND REGULATION FOR TUMORIGENICITY IN PLANT DISEASE... 

Tryptophan pool size is regulated by feedback inhibition of anthranilate synthase by tryptophan. Other mechanisms, as yet unidentified, may regulate tryptophan and indoleacetic acid synthesis. 

The availability of tryptophan is also a determining factor in the formation of indoleacetic acid the pool size of tryptophan is regulated in part by tryptophan feedback inhibition of anthranilate synthase. 

Investigations of indolic auxin metabolism in plants have centered about attempts to understand plant growth regulation. As a consequence, factors which limit the concentration of indoleacetic acid in plant tissue have received the most attention. These include its S3mthesis, its catabolism, and its removal from the site of action by other means. This will also provide a convenient division for discussion here. Full reference to the original work has been provided elsewhere. ... 

The simple model of a hormone system implies that the chemical species will induce the regulatory response in some place remote from the site of its synthesis. This model is extremely well adapted to the auxin regulation of coleoptile growth where the indoleacetic acid was found to be produced in the coleoptile tip and moved in a directional transport system to the elongating portion of the coleoptile where it stimulated growth. 

II. Inhibition of cell division. Am J Bot 59 450-457 El-Antably HMM, Larsen P (1974) Distribution of gibberellins and abscisic acid in geo-tropically stimulated Vida faba roots. Physiol Plant 32 322-329 Eliasson L (1969) Growth regulators of Populus tremula, I. Distribution of auxin and growth inhibitors. Physiol Plant 22 1288-1301 Eliasson L (1975) Effect of indoleacetic acid on the abscisic acid level in stem tissue. Physiol Plant 34 117-120... 

Rappaport L (1979) Does GA3 regulate cell division Plant Physiol 63 Suppl, p 32 Rauser WE, Horton RF (1975) Rapid effects of indoleacetic acid and ethylene on the growth of intact pea roots. Plant Physiol 55 443-447 Rehm MM, Cline MG (1973) Rapid growth inhibition of Avena coleoptile segments by abscisic acid. Plant Physiol 51 93-96... 

McCready CC, Jacobs WP (1963 a) Movement of growth regulators in plants. II. Polar transport of radioactivity from indoleacetic acid- C and 2,4-dichlorophenoxyacetic acid- C in petioles of Phaseolus vulgaris. New Phytol 62 19-34 McCready CC, Jacobs WP (1963 b) Movement of growth regulators in plants. IV. Relationship between age, growth, and polar transport in petioles of Phaseolus vulgaris. New Phytol 62 360-366... 

Mitchell EK, Davies PJ (1975) Evidence for three different systems of movement of indoleacetic acid in intact roots of Phaseolus coccineus. Physiol Plant 33 290-294 Mitchinson GJ (1980) The dynamics of auxin transport. Proc R Soc Lond B 209 489-511 Mittelheuser CJ, van Steveninck RFM (1971) Rapid action of abscisic acid on photosynthesis and stomatal resistance. Planta 97 83-86 Morath M (1972) Some early effects of auxin and of geotropic exposure on coleoptiles. In Kaldewey H, Vardar Y (eds) Hormonal regulation in plant growth and development. Verlag Chemie, Weinheim, pp 377-381 Morgan DG (1964) Influence of a-naphthylphthalamic acid on the movement of indolyl-3-acetic acid in plants. Nature 201 476-477... 

The related substance xanthoxin 4.58) clearly plays a fimdamental part in normal plant regulation by antagonizing indoleacetic acid, gibberellic acid, and kinetin. It is readily oxidized to abscisic acid, of which it is probably the natural precursor and with which it shares the trans trans configuration (Taylor and Burden, 1972). 

Letham DS (1967) Regulators of cell division in plant tissues. V. A comparison of the activities of zeatin and other cytokinins in five bioassays. Planta 74 228-242 Little CHA, Heald JK, Browning G (1978) Identification and measurement of indoleacetic and abscisic acids in the cambial region by combined gas chromatography-mass spectrometry. Planta 139 133-138... 

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