| Measurement of the rates of oxindole-3-acetic acid turnover, and indole-3-acetic acid oxidation in Zea mays seedlings. | |
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MedLine Citation:
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PMID: 11539687 Owner: NASA Status: MEDLINE |
Abstract/OtherAbstract:
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Oxindole-3-acetic acid is the principal catabolite of indole-3-acetic acid in Zea mays seedlings. In this paper measurements of the turnover of oxindole-3-acetic acid are presented and used to calculate the rate of indole-3-acetic acid oxidation. [3H]Oxindole-3-acetic acid was applied to the endosperm of Zea mays seedlings and allowed to equilibrate for 24 h before the start of the experiment. The subsequent decrease in its specific activity was used to calculate the turnover rate. The average half-life of oxindole-3-acetic acid in the shoots was found to be 30 h while that in the kernels had an average half-life of 35h. Using previously published values of the pool sizes of oxindole-3-acetic acid in shoots and kernels from seedlings of the same age and variety, and grown under the same conditions, the rate of indole-3-acetic acid oxidation was calculated to be 1.1 pmol plant-1 h-1 in the shoots and 7.1 pmol plant-1 h-1 in the kernels. |
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Authors:
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H M Nonhebel |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Journal of experimental botany Volume: 37 ISSN: 0022-0957 ISO Abbreviation: J. Exp. Bot. Publication Date: 1986 Nov |
Date Detail:
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Created Date: 1997-10-10 Completed Date: 1997-10-10 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 9882906 Medline TA: J Exp Bot Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 1691-7 Citation Subset: S |
Affiliation:
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Department of Botany and Plant Pathology, Michigan State University, East Lansing 48824, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Indoleacetic Acids
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metabolism* Oxidation-Reduction Plant Growth Regulators / metabolism* Plant Shoots / metabolism Time Factors Zea mays / metabolism* |
| Grant Support | |
ID/Acronym/Agency:
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ORD 30668/OR/ORS NIH HHS; PCM 8204017/PC/NCI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Indoleacetic Acids; 0/Plant Growth Regulators; 2971-31-5/2-oxindole-3-acetic acid; 87-51-4/indoleacetic acid |
| Investigator | |
Investigator/Affiliation:
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R S Bandurski / MI St U, E Lansing |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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