Metabolism of Indole-3-Acetic Acid | Zendy

Robert H. Hamilton | Zendy; Harold E. Meyer | Zendy; Robert E. Burke | Zendy; Chao S. Feung | Zendy; Ralph O. Mumma | Zendy

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Metabolism of Indole-3-Acetic Acid

Author(s) -

Robert H. Hamilton,

Harold E. Meyer,

Robert E. Burke,

Chao S. Feung,

Ralph O. Mumma

Publication year - 1976

Publication title -

plant physiology

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.58.1.77

Subject(s) - coleoptile , avena , decarboxylation , chemistry , auxin , acetone , acetic acid , indole 3 acetic acid , biochemistry , bioassay , indole test , aromatization , oxidase test , botany , chromatography , biology , enzyme , catalysis , gene , genetics

An indoleacetic acid oxidase preparation from an acetone powder of Parthenocissus tricuspidata crown-gall tissue has been examined. An intermediate in the reaction is 3-hydroxymethyloxindole and nonenzymic conversion of it to 3-methyleneoxindole was observed. Neither reaction mixtures nor 3-methyleneoxindole have any auxin-like activity in Avena or wheat coleoptile bioassays. In vivo studies show that although 53% decarboxylation of indoleacetic acid was observed in 48 hours, only a small amount of 3-methyloxindole could be recovered from the medium. The other decarboxylated products remain to be identified but are not 3-hydroxymethyloxindole or 3-methyleneoxindole.

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