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Cited by 574

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Phenotypic Plasticity of Adventitious Rooting in Arabidopsis Is Controlled by Complex Regulation of AUXIN RESPONSE FACTOR Transcripts and MicroRNA Abundance

Open access
Gutierrez, Laurent, Bussell, John D., Păcurar, Daniel I., Schwambach, Josèli, Păcurar, Monica, Bellini, Catherine·2009·The Plant Cell

Abstract

The development of shoot-borne roots, or adventitious roots, is indispensable for mass propagation of elite genotypes. It is a complex genetic trait with a high phenotypic plasticity due to multiple endogenous and environmental regulatory factors. We demonstrate here that a subtle balance of activator and repressor AUXIN RESPONSE FACTOR (ARF) transcripts controls adventitious root initiation. Moreover, microRNA activity appears to be required for fine-tuning of this process. Thus, ARF17, a target of miR160, is a negative regulator, and ARF6 and ARF8, targets of miR167, are positive regulators of adventitious rooting. The three ARFs display overlapping expression domains, interact genetically, and regulate each other's expression at both transcriptional and posttranscriptional levels by modulating miR160 and miR167 availability. This complex regulatory network includes an unexpected feedback regulation of microRNA homeostasis by direct and nondirect target transcription factors. These results provide evidence of microRNA control of phenotypic variability and are a significant step forward in understanding the molecular mechanisms regulating adventitious rooting.

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Metadata

Authors
Gutierrez, L., Bussell, J. D., Păcurar, D. I., Schwambach, J., Păcurar, M., & Bellini, C.
Venue
The Plant Cell
Published
2009-10-01
Volume
21
Issue
10
Pages
3119-3132
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2130482519
Cited by
574
References
1
FWCI
24.18
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Phenotypic Plasticity of Adventitious Rooting in Arabidopsis Is Controlled by Complex Regulation of AUXIN RESPONSE FACTOR Transcripts and MicroRNA Abundance. https://app.cochat.ai/papers/10.1105/tpc.108.064758
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Gutierrez, L., Bussell, J. D., Păcurar, D. I., Schwambach, J., Păcurar, M., & Bellini, C. (2009). Phenotypic Plasticity of Adventitious Rooting in Arabidopsis Is Controlled by Complex Regulation of AUXIN RESPONSE FACTOR Transcripts and MicroRNA Abundance. The Plant Cell. https://doi.org/10.1105/tpc.108.064758

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