Abstract
The nature of the products of the auxin catabolism mediated by both basic and acidic isoperoxidases has been studied. While indole-3-methanol is only a minor product of the oxidation of indole-3-acetic acid catalyzed by extracellular acidic isoperoxidases, it is the only product of the oxidation of indole-3-acetic acid catalyzed by two cytosolic basic isoperoxidases (EC 1.11.1.7) from lupin (Lupinus albus L.) hypocotyls. The putative indole-3-methanol formed by these latter isoperoxidases was isolated and then characterized by mass spectrometry and 1H-nuclear magnetic resonance spectrometry. These results are discussed with respect to the diversity and compartmentation of the catabolism of indole-3-acetic acid in plant tissues.
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Abbreviations
- DCP:
-
2,4-dichlorophenol
- IAA:
-
indole-3-acetic acid
- IM:
-
indole-3-methanol
References
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Ros Barceló, A., Pedreño, M.A., Ferrer, M.A. et al. Indole-3-methanol is the main product of the oxidation of indole-3-acetic acid catalyzed by two cytosolic basic isoperoxidases from Lupinus . Planta 181, 448–450 (1990). https://doi.org/10.1007/BF00195900
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DOI: https://doi.org/10.1007/BF00195900