Results 181 to 190 of about 6,883 (206)
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Occurrence of Indoleacetic Acid in the Bryophytes
Botanical Gazette, 1967A naturally occurring growth regulator in extracts of Marchantia polymorpha tissues has been characterized by paper chromatography and bioassay. The endogenous compound is presumed to be indoleacetic acid (IAA) on the basis of its chromatographic behavior in five solvents, its biological activity in the Avena straight-growth test, and the utilization ...
Robert F. Troxler +2 more
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The Botanical Review, 1964
S p e c ifi c ialty nctio f.-th e E n z y m e .__ '''.'''.'.........-.''.--''''''''''''''''-'-' -'-''''113 Specifici y of the Enzyme 134 Chemistry of the Enzyme ..... 135 Mechanism of Action 13 5 Oxidation Products.13 8 Factors Influencing Action.141 Temperature, Oxygen, Time, Concentrations .141 1H.141 Natural Inhibitors.141 Occurrence and
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S p e c ifi c ialty nctio f.-th e E n z y m e .__ '''.'''.'.........-.''.--''''''''''''''''-'-' -'-''''113 Specifici y of the Enzyme 134 Chemistry of the Enzyme ..... 135 Mechanism of Action 13 5 Oxidation Products.13 8 Factors Influencing Action.141 Temperature, Oxygen, Time, Concentrations .141 1H.141 Natural Inhibitors.141 Occurrence and
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KINETICS OF THE ENZYMICALLY-CATALYZED OXIDATION OF INDOLEACETIC ACID
Canadian Journal of Biochemistry and Physiology, 1956A study of the kinetics of the enzymically-catalyzed decarboxylation and oxidation of indoleacetic acid has provided evidence that it is a chain autoxidation initiated and propagated by two enzyme-controlled peroxidations. The following reaction sequence occurs:[Formula: see text]where S—COOH = indoleacetic acid; S∙ = skatole radical; SO2∙ = oxidized ...
E. R. Waygood, G. A. Maclachlan
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Interaction of Gibberellic Acid and Indoleacetic Acid in Impatiens
Science, 1959Gibberellic acid promotes doubling, early flowering, and fruiting directly in Impatiens . It also lengthens the stem, probably through a neutralization of auxin inhibitors. Such a mechanism would leave the growth-promoting auxins unchecked to produce the increased elongation characteristic of gibberellin application.
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The Production of Indoleacetic Acid by Phycomyces Blakesleeanus
Mycologia, 1965Species of Phycomyces have often been used for studies on the effect of auxins on fungi (Gruen, 1959a), but have received only little attention from the point of view of auxin synthesis. Heyn (1935) reported briefly that sporangiophores of Phycomyces nitens Kunze contained auxin with a molecular weight close to that of indoleacetic acid (IAA) as ...
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Inhibition of pyrogallol oxidation by 3-indoleacetic acid
Archives of Biochemistry and Biophysics, 1959Abstract The plant growth substance, 3-indoleacetic acid (IAA), has been shown to inhibit the oxidation of pyrogallol in a variety of model reaction systems. The effectiveness of IAA as an antioxidant is greatest in methanol, and declines with increasing chain length in systems containing straight-chain alcohols.
P. Frost, S. M. Siegel, F. Porto
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THE ENZYMICALLY CATALYZED OXIDATION OF INDOLEACETIC ACID
Canadian Journal of Botany, 1956Dialyzed wheat leaf extracts, catalase, and horse-radish peroxidase catalyze the decarboxylation and oxidation of indoleacetic acid at pH 5.0–6.0 in the presence of critical concentrations of manganese and monohydric phenols or resorcinol. The equivalent of 1 mole of carbon dioxide is liberated and 1 mole of oxygen consumed per mole of substrate ...
Ann Oaks +2 more
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Chlorogenic acid as a competitive inhibitor of indoleacetic acid oxidase
Archives of Biochemistry and Biophysics, 1957Abstract An enzyme system oxidizing indoleacetic acid was isolated from pea epicotyls. It had an optimal activity at pH 5.6. Chlorogenic acid was a competitive inhibitor for the oxidase in vitro. Caffeic acid inhibited IAA oxidase in a noncompetitive fashion, and quinic acid, the other moiety of chlorogenic acid, was inactive.
Ruth S. Rabin, Richard M. Klein
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Tetrahedron Letters, 1987
AbstractThe indole‐3‐acetic acid derivatives (I) are two‐ or threefold deprotonated and then treated with iodine to give the dimers (II).
Jan Bergman, B. Pelcman
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AbstractThe indole‐3‐acetic acid derivatives (I) are two‐ or threefold deprotonated and then treated with iodine to give the dimers (II).
Jan Bergman, B. Pelcman
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Journal of Photochemistry and Photobiology A: Chemistry, 1990
Abstract Mechanisms accounting for the types and yields of the products obtained in direct and dye-sensitized photo-oxidation of the compounds 3-indoleacetic acid (1a), methyl-3-indoleacetate (1b) and 1-methyl-3-indoleacetic acid (1c) in aqueous buffer (pH 5 or pH 8) containing 10% methanol are discussed.
Francisco Amat-Guerri +1 more
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Abstract Mechanisms accounting for the types and yields of the products obtained in direct and dye-sensitized photo-oxidation of the compounds 3-indoleacetic acid (1a), methyl-3-indoleacetate (1b) and 1-methyl-3-indoleacetic acid (1c) in aqueous buffer (pH 5 or pH 8) containing 10% methanol are discussed.
Francisco Amat-Guerri +1 more
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