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Cited by 490

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Crown rootless1 , Which Is Essential for Crown Root Formation in Rice, Is a Target of an AUXIN RESPONSE FACTOR in Auxin Signaling

Open access
Inukai, Yoshiaki, Sakamoto, Tomoaki, Ueguchi-Tanaka, Miyako, Shibata, Yohko, Gomi, Kenji, Umemura, Iichiro, Hasegawa, Yasuko, Ashikari, Motoyuki, Kitano, Hidemi, Matsuoka, Makoto·2005·The Plant Cell

Abstract

Although the importance of auxin in root development is well known, the molecular mechanisms involved are still unknown. We characterized a rice (Oryza sativa) mutant defective in crown root formation, crown rootless1 (crl1). The crl1 mutant showed additional auxin-related abnormal phenotypic traits in the roots, such as decreased lateral root number, auxin insensitivity in lateral root formation, and impaired root gravitropism, whereas no abnormal phenotypic traits were observed in aboveground organs. Expression of Crl1, which encodes a member of the plant-specific ASYMMETRIC LEAVES2/LATERAL ORGAN BOUNDARIES protein family, was localized in tissues where crown and lateral roots are initiated and overlapped with β-glucuronidase staining controlled by the DR5 promoter. Exogenous auxin treatment induced Crl1 expression without de novo protein biosynthesis, and this induction required the degradation of AUXIN/INDOLE-3-ACETIC ACID proteins. Crl1 contains two putative auxin response elements (AuxREs) in its promoter region. The proximal AuxRE specifically interacted with a rice AUXIN RESPONSE FACTOR (ARF) and acted as a cis-motif for Crl1 expression. We conclude that Crl1 encodes a positive regulator for crown and lateral root formation and that its expression is directly regulated by an ARF in the auxin signaling pathway.

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Metadata

Authors
Inukai, Y., Sakamoto, T., Ueguchi-Tanaka, M., Shibata, Y., Gomi, K., Umemura, I., Hasegawa, Y., Ashikari, M., Kitano, H., & Matsuoka, M.
Venue
The Plant Cell
Published
2005-04-29
Volume
17
Issue
5
Pages
1387-1396
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2144780460
Cited by
490
References
35
FWCI
16.44
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Crown rootless1 , Which Is Essential for Crown Root Formation in Rice, Is a Target of an AUXIN RESPONSE FACTOR in Auxin Signaling. https://app.cochat.ai/papers/10.1105/tpc.105.030981
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Inukai, Y., Sakamoto, T., Ueguchi-Tanaka, M., Shibata, Y., Gomi, K., Umemura, I., Hasegawa, Y., Ashikari, M., Kitano, H., & Matsuoka, M. (2005). Crown rootless1 , Which Is Essential for Crown Root Formation in Rice, Is a Target of an AUXIN RESPONSE FACTOR in Auxin Signaling. The Plant Cell. https://doi.org/10.1105/tpc.105.030981

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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