The relationship between oxidase activity, peroxidase activity, hydrogen peroxide, and phenolic compounds in the degradation of indole-3-acetic acid in vitro

Autor:	B. Langenbeck-Schwich, Hans J. Grambow
Rok vydání:	1983
Předmět:	chemistry.chemical_classification Oxidase test biology food and beverages Plant Science Catalysis chemistry.chemical_compound chemistry Auxin Genetics biology.protein Organic chemistry Oxindole Phenols Hydrogen peroxide Indole-3-acetic acid Peroxidase
Zdroj:	Planta. 157:132-137
ISSN:	1432-2048 0032-0935
DOI:	10.1007/bf00393646
Popis:	The peroxidase catalyzed degradation of indole-3-acetic acid (IAA) results in the formation of indole-3-methanol (IM) in the presence of phenolic compounds or in 3-hydroxymethyloxindole (HMOx) in their absence. Apparently the phenols compote with a methyleneindolenine intermediate for H2O2 which is produced by oxidase action preceding the peroxidase action in the course of IAA degradation. The substitution pattern of various phenolic compounds tested strongly effects the rate of the reaction. However, this substitution pattern does not appear to effect the type of the reaction or the products formed. We suggest that the function of the "oxindole pathway" is to detoxify excess H2O2 in the absence of phenolic cosubstrates. The results lead to a number of interesting aspects of IAA biochemistry and to the proposal of a new reaction scheme for the peroxidase catalyzed degradation of IAA.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb0c8d8b8cc052439e820aa8fe2b439e https://doi.org/10.1007/bf00393646 Zobrazit plný text záznamu Full text from SpringerLink