Auxin Activity of Isatin and Oxindole-3-Acetic Acid
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چکیده
منابع مشابه
Auxin Activity of Isatin and Oxindole-3-Acetic Acid.
Most workers have found that oxindoles are inactive as auxins or as auxin antagonists. For example, Thimann (44) working with straight growth of Az'ena coleoptile cylinders anid Pisitm stem sectiolns, and with growth curvature of slit Pistni stem sections, found the following 6 compounds to be without effect at concentraticns up to 30 mg/liter, both in the absence and presence of IAA at concent...
متن کاملOxindole-3-acetic Acid, an Indole-3-acetic Acid Catabolite in Zea mays.
A prior study (13) from this laboratory showed that oxidation of exogenously applied indole-3-acetic acid (IAA) to oxindole-3-acetic acid (OxIAA) is the major catabolic pathway for IAA in Zea mays endosperm. In this work, we demonstrate that OxIAA is a naturally occurring compound in shoot and endosperm tissue of Z. mays and that the amount of OxIAA in both shoot and endosperm tissue is approxi...
متن کاملRegulation of auxin homeostasis and gradients in Arabidopsis roots through the formation of the indole-3-acetic acid catabolite 2-oxindole-3-acetic acid.
The native auxin, indole-3-acetic acid (IAA), is a major regulator of plant growth and development. Its nonuniform distribution between cells and tissues underlies the spatiotemporal coordination of many developmental events and responses to environmental stimuli. The regulation of auxin gradients and the formation of auxin maxima/minima most likely involve the regulation of both metabolic and ...
متن کاملOxidative reaction of oxindole-3-acetic acids.
The oxindole-3-acetic acids, oxidative metabolites of indole-3-acetic acid, were isolated from a byproduct of a corn starch manufacturing plant, and were further converted to the 3-hydroxyl derivatives in the presence of metal ion. The mechanical study was followed by a chemical analysis including other byproducts, and suggested the presence of an intermediate that had a radical at the C-3 posi...
متن کاملOxidation of indole-3-acetic acid to oxindole-3-acetic acid by an enzyme preparation from Zea mays.
Indole-3-acetic acid is oxidized to oxindole-3-acetic acid by Zea mays tissue extracts. Shoot, root, and endosperm tissues have enzyme activities of 1 to 10 picomoles per hour per milligram protein. The enzyme is heat labile, is soluble, and requires oxygen for activity. Cofactors of mixed function oxygenase, peroxidase, and intermolecular dioxygenase are not stimulatory to enzymic activity....
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1965
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.40.4.699