| Genetic analysis of the effects of polar auxin transport inhibitors on root growth in Arabidopsis thaliana. | |
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MedLine Citation:
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PMID: 9032965 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Polar auxin transport inhibitors, including N-1-naphthylphthalamic acid (NPA) and 2,3,5-triiodobenzoic acid (TIBA), have various effects on physiological and developmental events, such as the elongation and tropism of roots and stems, in higher plants. We isolated NPA-resistant mutants of Arabidopsis thaliana, with mutations designated pir1 and pir2, that were also resistant to TIBA. The mutations specifically affected the root-elongation process, and they were shown ultimately to be allelic to aux1 and ein2, respectively, which are known as mutations that affect responses to phytohormones. The mechanism of action of auxin transport inhibitors was investigated with these mutants, in relation to the effects of ethylene, auxin, and the polar transport of auxin. With respect to the inhibition of root elongation in A. thaliana, we demonstrated that (1) the background level of ethylene intensifies the effects of auxin transport inhibitors, (2) auxin transport inhibitors might act also via an inhibitory pathway that does not involve ethylene, auxin, or the polar transport of auxin, (3) the hypothesis that the inhibitory effect of NPA on root elongation is due to high-level accumulation of auxin as a result of blockage of auxin transport is not applicable to A. thaliana, and (4) in contrast to NPA, TIBA itself has a weak auxin-like inhibitory effect. |
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Authors:
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H Fujita; K Syono |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Plant & cell physiology Volume: 37 ISSN: 0032-0781 ISO Abbreviation: Plant Cell Physiol. Publication Date: 1996 Dec |
Date Detail:
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Created Date: 1997-03-25 Completed Date: 1997-03-25 Revised Date: 2005-11-17 |
Medline Journal Info:
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Nlm Unique ID: 9430925 Medline TA: Plant Cell Physiol Country: JAPAN |
Other Details:
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Languages: eng Pagination: 1094-101 Citation Subset: IM; S |
Affiliation:
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Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Arabidopsis
/
genetics,
growth & development,
physiology Biological Transport Drug Resistance Ethylenes / chemistry Indoleacetic Acids / antagonists & inhibitors* Mutagenesis Phthalimides / chemistry* Plant Roots / growth & development Triiodobenzoic Acids / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Ethylenes; 0/Indoleacetic Acids; 0/Phthalimides; 0/Triiodobenzoic Acids; 132-66-1/alpha-naphthylphthalamic acid; 74-85-1/ethylene; 88-82-4/2,3,5-triiodobenzoic acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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