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<i>Arabidopsis</i>NAC1 transduces auxin signal downstream of TIR1 to promote lateral root development

ArabidopsisNAC1 transduces auxin signal downstream of TIR1 to promote lateral root... Downloaded from genesdev.cshlp.org on October 22, 2021 - Published by Cold Spring Harbor Laboratory Press Arabidopsis NAC1 transduces auxin signal downstream of TIR1 to promote lateral root development 1 2 2 2,3 Qi Xie, Giovanna Frugis, Diana Colgan, and Nam-Hai Chua Laboratory of Plant Cell Biology, Institute of Molecular Agrobiology, National University of Singapore, 117604 Singapore; Laboratory of Plant Molecular Biology, Rockefeller University, New York, New York 10021, USA Auxin plays a key role in lateral root formation, but the signaling pathway for this process is poorly understood. We show here that NAC1, a new member of the NAC family, is induced by auxin and mediates auxin signaling to promote lateral root development. NAC1 is a transcription activator consisting of an N-terminal conserved NAC-domain that binds to DNA and a C-terminal activation domain. This factor activates the expression of two downstream auxin-responsive genes, DBP and AIR3. Transgenic plants expressing sense or antisense NAC1 cDNA show an increase or reduction of lateral roots, respectively. Finally, TIR1-induced lateral root development is blocked by expression of antisense NAC1 cDNA, and NAC1 overexpression can restore lateral root formation in the auxin-response mutant tir1, indicating that NAC1 acts downstream of TIR1. [Key Words: Auxin; http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Genes & Development Unpaywall

<i>Arabidopsis</i>NAC1 transduces auxin signal downstream of TIR1 to promote lateral root development

Genes & DevelopmentDec 1, 2000
14 pages

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Publisher
Unpaywall
ISSN
0890-9369
DOI
10.1101/gad.852200
Publisher site
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Abstract

Downloaded from genesdev.cshlp.org on October 22, 2021 - Published by Cold Spring Harbor Laboratory Press Arabidopsis NAC1 transduces auxin signal downstream of TIR1 to promote lateral root development 1 2 2 2,3 Qi Xie, Giovanna Frugis, Diana Colgan, and Nam-Hai Chua Laboratory of Plant Cell Biology, Institute of Molecular Agrobiology, National University of Singapore, 117604 Singapore; Laboratory of Plant Molecular Biology, Rockefeller University, New York, New York 10021, USA Auxin plays a key role in lateral root formation, but the signaling pathway for this process is poorly understood. We show here that NAC1, a new member of the NAC family, is induced by auxin and mediates auxin signaling to promote lateral root development. NAC1 is a transcription activator consisting of an N-terminal conserved NAC-domain that binds to DNA and a C-terminal activation domain. This factor activates the expression of two downstream auxin-responsive genes, DBP and AIR3. Transgenic plants expressing sense or antisense NAC1 cDNA show an increase or reduction of lateral roots, respectively. Finally, TIR1-induced lateral root development is blocked by expression of antisense NAC1 cDNA, and NAC1 overexpression can restore lateral root formation in the auxin-response mutant tir1, indicating that NAC1 acts downstream of TIR1. [Key Words: Auxin;

Journal

Genes & DevelopmentUnpaywall

Published: Dec 1, 2000

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