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Record Details

Record 13 of 2477
Translocation of radiolabeled indole-3-acetic acid and indole-3-acetyl-myo-inositol from kernel to shoot of Zea mays L
Author and Affiliation:
Chisnell, J. R.(Michigan State University, Department of Botany and Plant Pathology, East Lansing, 48824-1312, United States)
Bandurski, R. S.
Abstract: Either 5-[3H]indole-3-acetic acid (IAA) or 5-[3H]indole-3-acetyl-myo-inositol was applied to the endosperm of kernels of dark-grown Zea mays seedlings. The distribution of total radioactivity, radiolabeled indole-3-acetic acid, and radiolabeled ester conjugated indole-3-acetic acid, in the shoots was then determined. Differences were found in the distribution and chemical form of the radiolabeled indole-3-acetic acid in the shoot depending upon whether 5-[3H]indole-3-acetic acid or 5-[3H]indole-3-acetyl-myo-inositol was applied to the endosperm. We demonstrated that indole-3-acetyl-myo-inositol applied to the endosperm provides both free and ester conjugated indole-3-acetic acid to the mesocotyl and coleoptile. Free indole-3-acetic acid applied to the endosperm supplies some of the indole-3-acetic acid in the mesocotyl but essentially no indole-3-acetic acid to the coleoptile or primary leaves. It is concluded that free IAA from the endosperm is not a source of IAA for the coleoptile. Neither radioactive indole-3-acetyl-myo-inositol nor IAA accumulates in the tip of the coleoptile or the mesocotyl node and thus these studies do not explain how the coleoptile tip controls the amount of IAA in the shoot.
Publication Date: Jan 01, 1988
Document ID:
20040090133
(Acquired Sep 07, 2004)
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publication Information: Plant physiology (ISSN 0032-0889); Volume 86; 79-84
Publisher Information: United States
Contract/Grant/Task Num: NAGW-97; PCM 8204017
Financial Sponsor: NASA; Washington DC United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACETIC ACID; INDOLEACETIC ACIDS; INDOLES; INOSITOLS; KERNEL FUNCTIONS; METABOLISM; PLANT GROWTH REGULATORS; PLANTS (BOTANY); SEEDS; STEMS; CARBON ISOTOPES; CORN; ESTERS; EXOBIOLOGY; HYDROLYSIS; RADIOACTIVE ISOTOPES
Other Descriptors: INDOLEACETIC ACIDS/PHARMACOKINETICS; PLANT GROWTH REGULATORS/PHARMACOKINETICS; PLANT SHOOTS/METABOLISM/PHYSIOLOGY; SEEDS/METABOLISM/PHYSIOLOGY; CARBON RADIOISOTOPES; ESTERS; HYDROLYSIS; SUPPORT, U.S. GOV'T, NON-P.H.S; SUPPORT, U.S. GOV'T, P.H.S; ZEA MAYS/METABOLISM/PHYSIOLOGY; NASA DISCIPLINE NUMBER 40-10; NASA DISCIPLINE PLANT BIOLOGY; NASA PROGRAM SPACE BIOLOGY; NON-NASA CENTER
Availability Source: Other Sources
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