期刊
NATURE CELL BIOLOGY
卷 16, 期 1, 页码 66-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncb2893
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资金
- Advanced Biomass RD Center [2010-0029720]
- National Research Foundation [20110000212]
- Korean Ministry of Education, Science and Technology
- Next Generation BioGreen 21 Program [PJ009516]
- Brain Korea 21 fellowship
- BBSRC David Phillips Fellowship [BB_BB/H022457/1]
- Marie Curie European Reintegration Grant [PERG06-GA-2009-256354]
- Biotechnology and Biological Sciences Research Council [BB/G023972/1, 1094837, BB/H022457/1, BB/J009717/1, BB/H020314/1] Funding Source: researchfish
- BBSRC [BB/H022457/1, BB/H020314/1, BB/G023972/1] Funding Source: UKRI
The phytohormone auxin is a key developmental signal in plants. So far, only auxin perception has been described to trigger the release of transcription factors termed AUXIN RESPONSE FACTORs (ARFs) from their AUXIN/INDOLE-3-ACETIC ACID (AUX/IAA) repressor proteins. Here, we show that phosphorylation of ARF7 and ARF19 by BRASSINOSTEROID-INSENSITIVE2 (BIN2) can also potentiate auxin signalling output during lateral root organogenesis. BIN2-mediated phosphorylation of ARF7 and ARF19 suppresses their interaction with AUX/IAAs, and subsequently enhances the transcriptional activity to their target genes LATERAL ORGAN BOUNDARIES-DOMAIN16 (LBD16) and LBD29. In this context, BIN2 is under the control of the TRACHEARY ELEMENT DIFFERENTIATION INHIBITORY FACTOR (TDIF)-TDIF RECEPTOR (TDR) module. TDIF-initiated TDR signalling directly acts on BIN2-mediated ARF phosphorylation, leading to the regulation of auxin signalling during lateral root development. In summary, this study delineates a TDIF-TDR-BIN2 signalling cascade that controls regulation of ARF and AUX/IAA interaction independent of auxin perception during lateral root development.
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