Journal Article

Differential Effects of 1-Naphthaleneacetic Acid, Indole-3-Acetic Acid and 2,4-Dichlorophenoxyacetic Acid on the Gravitropic Response of Roots in an Auxin-Resistant Mutant of Arabidopsis, <i>auxl</i>

Makoto Yamamoto and Kotaro T. Yamamoto

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 39, issue 6, pages 660-664
Published in print June 1998 | ISSN: 0032-0781
Published online June 1998 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/oxfordjournals.pcp.a029419
Differential Effects of 1-Naphthaleneacetic Acid, Indole-3-Acetic Acid and 2,4-Dichlorophenoxyacetic Acid on the Gravitropic Response of Roots in an Auxin-Resistant Mutant of Arabidopsis, auxl

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The agravitropic nature of root growth of an auxin-resistant mutant of Arabidopsis, auxl, was restored when the synthetic auxin 1-naphthaleneacetic acid (NAA) was added to the growth medium; auxl roots were not resistant to NAA. Neither indole-3-acetic acid nor 2,4-dichlorophenox-yacetic acid had the same effects as NAA. These differential effects of the three auxins on auxl defects suggest that AUX1 may encode the auxin influx carrier according to the model proposed by Oelbarre et al. [(1996) Planta 198: 532].

Keywords: Arabidopsis thaliana; AUX1; Auxin influx carrier; Auxin-resistant mutant; Gravitropism of root; Growth of root

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Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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