Abstract
Tissue manganese was found to influence the indoleacetic acid (IAA) system of cotton over a wide range of concentrations. The cofactor and inhibitor activities of the IAA-oxidase system were affected as the concentration of manganese in the tissue was varied. Maximum inhibitor activity was found in leaf extracts from the plants grown in 0.5 mg/l manganese (Hoagland's level). The inhibitor activity decreased in the leaf extracts of plants grown at concentrations of manganese either higher or lower than 0.5 mg/l. Abnormally high IAA-oxidase activity was found in the leaves of plants grown in deficient levels of manganese (<0.0005, 0.005 mg/l) and the extracts from plants in the <0.0005 mg/l Mn treatment showed IAA-oxidase cofactor activity.
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Selected References
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- GORTNER W. A., KENT M. Indoleacetic acid oxidase and an inhibitor in pineapple tissue. J Biol Chem. 1953 Oct;204(2):593–603. [PubMed] [Google Scholar]
- KENTEN R. H. The oxidation of indolyl-3-acetic acid by waxpod bean root sap and peroxidase systems. Biochem J. 1955 Jan;59(1):110–121. doi: 10.1042/bj0590110. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Morgan P. W., Hall W. C. Indoleacetic Acid Oxidizing Enzyme & Inhibitors from Light-Grown Cotton. Plant Physiol. 1963 Jul;38(4):365–370. doi: 10.1104/pp.38.4.365. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Morgan P. W., Joham H. E., Amin J. V. Effect of manganese toxicity on the indoleacetic Acid oxidase system of cotton. Plant Physiol. 1966 Apr;41(4):718–724. doi: 10.1104/pp.41.4.718. [DOI] [PMC free article] [PubMed] [Google Scholar]
- RAY P. M., THIMANN K. V. The destruction of indoleacetic acid. I. Action of an enzyme from Omphalia flavida. Arch Biochem Biophys. 1956 Sep;64(1):175–192. doi: 10.1016/0003-9861(56)90253-3. [DOI] [PubMed] [Google Scholar]