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Record Details

Record 16 of 2477
Measurement of the rates of oxindole-3-acetic acid turnover, and indole-3-acetic acid oxidation in Zea mays seedlings
Author and Affiliation:
Nonhebel, H. M.(Michigan State University, Department of Botany and Plant Pathology, East Lansing 48824, United States)
Bandurski, R. S. [Principal Investigator]
Abstract: 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.
Publication Date: Nov 01, 1986
Document ID:
20040089639
(Acquired Sep 07, 2004)
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publication Information: Journal of experimental botany (ISSN 0022-0957); Volume 37; 184; 1691-7
Publisher Information: United Kingdom
Contract/Grant/Task Num: NAGW-97; ORD 30668; PCM 8204017
Financial Sponsor: NASA; Washington DC United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACETIC ACID; CORN; INDOLEACETIC ACIDS; INDOLES; OXIDATION; PLANT GROWTH REGULATORS; PLANTS (BOTANY); SEEDLINGS (BOTANY); EXOBIOLOGY; OXIDATION-REDUCTION REACTIONS; STEMS; TIME DEPENDENCE
Other Descriptors: INDOLEACETIC ACIDS/METABOLISM; PLANT GROWTH REGULATORS/METABOLISM; ZEA MAYS/METABOLISM; OXIDATION-REDUCTION; PLANT SHOOTS/METABOLISM; SUPPORT, U.S. GOV'T, NON-P.H.S; TIME FACTORS; NASA DISCIPLINE NUMBER 40-10; NASA DISCIPLINE PLANT BIOLOGY; NON-NASA CENTER
Availability Source: Other Sources
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