Indoleacetic acid -oxidase

Yu and Wang431 considered that indole-3-acetic acid exerts its stimulating effect on expansion growth by inducing the synthesis of the enzyme catalyzing the conversion of S-adenosylmethionine into ACC, a conclusion at variance with the suggestion of Vioque and coworkers432 that indoleacetic acid oxidase and its substrate (IAA) participate in the last reaction in the ethylene biosynthesis pathway, namely, the formation of ethylene from ACC. [Pg.344]

Omran, R.G. (1980). Peroxide levels and the activities of catalase, peroxidase, and indoleacetic acid oxidase during and after chilling cucumber seedlings. Plant Physiology 65, 407-8. [Pg.286]

LXXXIV) or undergo further oxidation and base-catalyzed decarboxylation (LXXXVI) to the labile nonisolable 3-methyleneoxindole (LXXXVIIa), characterizable as the sodium bisulfate addition product (LXXXVIIb). 8-Methylene oxindole (LXXXVIIa) bears a spectral resemblance to the oxidation product of auxin produced by peroxidase or indoleacetic acid oxidase from the fungus Omphalia ftavida (Ray and Thimann, 1956). [Pg.245]

Indoleacetic acid is degraded in plants by a specific indoleacetic acid oxidase. This is a light-activatable flavoprotein enzyme coupled through hydrogen peroxide to a peroxidase (285 but cf. 463a, 805b). It apparently uses phenols as cofactors (296) but can be inhibited by polyphenols (305). The product of the reaction is still unidentified (836). [Pg.114]

Fujiwara, A., and Tsutsumi, M. (1955). Biochemical studies of microelements in green plants. I. Deficiency symptoms of microelements on barley plants and changes in indoleacetic acid oxidase activity (in Japanese). J. Sci. Soil Tokyo 26 259-62. [Pg.67]

Indoleacetic acid oxidase P decreases in nodule Dilworth (1975) Planque et al. (1977) Stripf and Werner (1978) Werner and Stripf (1978) Mennes (1973a b) Oostrom et al. [Pg.84]

Indoleacetic acid (16) is inactivated by plant systems. The effect is probably a resultant of the relative rate of formation, competition with similar compounds for the site of action, and its destruction. The structural similarity to coumarin may show a competition, but there are also indications that coumarin inhibits indoleacetic acid oxidase, which converts the inactive indolyl-3-acetaldehyde to the acid [114-116]. Some coumarin derivatives, like/ -coumaric (17), dichloro-p-coumaric (18), and ferulic acids (19) also affect indoleacetic acid oxidase [117,118]. [Pg.96]

Flavonoids with a o-dihydroxylated C-ring (D 22.3.3) Inhibitors of indoleacetic acid oxidase... [Pg.496]

Frenkel C (1972) Involvement of peroxidase and indoleacetic acid oxidase isozymes from pear, tomato and blueberry fruit in ripening. Plant Physiol 49 757-763 Fuchs Y, Lieberman M (1968) Effects of kinetin, lAA and gibberellin on ethylene production and their interactions in growth of seedlings. Plant Physiol 43 2029-2036 Fuente RK de la, Leopold AC (1972) Two components of auxin transport. Plant Physiol 50 491-495... [Pg.18]

Lee XT (1971) Cytokinin-controlled indoleacetic acid oxidase isoenzymes in tobacco callus cultures. Plant Physiol 47 181-185... [Pg.71]

Hall SM, Medlow GC (1974) Identification of lAA in phloem and root pressure saps of Ricinus communis L. by mass spectrometry. Planta 119 257-261 Halliday MBW, Wangermann E (1972 a) Leaf abscission in Coleus. I. Abscission zone formation and the effect of auxin on abscission. New Phytol 71 649-663 Halliday MBW, Wangermann E (1972b) Leaf abscission in Coleus. II. The distribution and fate of [ " C]-indolylacetic acid in the petiole. New Phytol 71 665-670 Hare RC (1964) Indoleacetic acid oxidase. Bot Rev 30 129-165... [Pg.133]

Constit. of muskmelon (Cucurbita moschata) seedlings and from infected bulbs of Orchis militaris and Loroglossum hircinum. Cofactor for indoleacetic acid oxidase. Prisms or needles (H2O). Mp 124.5-125.5°. a-Ac ... [Pg.225]

Mumford F.E., Stark H.M., Smith D.H. 4-Hydroxybenzyl alcohol, a naturally occurring cofactor of indoleacetic acid oxidase. Phytochemistry, 2 215-220(1963). [Pg.1074]

MATO M.C, and MENDEZ J. 1970, Inhibition of indoleacetic acid-oxidase by sodium humate. Geoderma, 3, 255-258. [Pg.104]

MATO M.C. and FABREGAS R. and MENDEZ J. 1971. Inhibitory effect of soil humic acids on indoleacetic acid oxidase. Soil Biology and Biochemistry, 3, 285-288. [Pg.104]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...