Occurrence and metabolism of 7-hydroxy-2-indolinone-3-acetic acid in Zea mays.
7-Hydroxy-2-indolinone-3-acetic acid was identified as a catabolite of indole-3-acetic acid in germinating kernels of Zea mays and found to be present in amounts of ca 3.1 nmol/kernel.  7-Hydroxy-2-indolinone-3-acetic acid was shown to be a biosynthetic intermediate between 2-indolinone-3-acetic acid and 7-hydroxy-2-indolinone-3-acetic acid-7'-O-glucoside in both kernels and roots of Zea mays.  Further metabolism of 7-hydroxy-2-[5-3H]-indolinone-3-acetic acid-7'-O-glucoside occurred to yield tritiated water plus, as yet, uncharacterized products.
Lewer
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Department of Botany and Plant Pathology, Michigan State University, East Lansing 48824-1312, USA.
Bandurski
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RS
D002851:Chromatography, High Pressure Liquid; D006897:Hydroxyindoleacetic Acid / Q000031:analogs & derivatives* / Q000378:metabolism; D006900:Hydroxylation; D007210:Indoleacetic Acids / Q000378:metabolism*; D010084:Oxidation-Reduction; D010937:Plant Growth Regulators / Q000378:metabolism*; D018517:Plant Roots / Q000254:growth & development; D012639:Seeds / Q000254:growth & development*; D003313:Zea mays / Q000254:growth & development*
D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D006897:Hydroxyindoleacetic Acid; C030737:indoleacetic acid; C046777:7-hydroxy-2-oxoindole-3-acetic acid 7'-O-glucopyranoside