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Reference Detail
| Reference | ||
|---|---|---|
| Author | Gonin M., Jeong K., Coudert Y., Lavarenne J., Giang Thi Hoang, Bes M., Huong Thi Mai To, Marie-Rose Ndella Thiaw, Toan Van Do, Moukouanga D., Soazig Guyomarc'h, Bellande K., Jean-Rémy Brossier, Parizot B., Hieu Trang Nguyen, Beeckman T., Véronique Bergougnoux, Rouster J., Sallaud C., Laplaze L., Champion A., Gantet P. | |
| Title | CROWN ROOTLESS1 binds DNA with a relaxed specificity and activates OsROP and OsbHLH044 genes involved in crown root formation in rice. | |
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Abstract: In cereals, the root system is mainly composed of post-embryonic shoot-borne roots, named crown roots. The CROWN ROOTLESS1 (CRL1) transcription factor, belonging to the ASYMMETRIC LEAVES2-LIKE/LATERAL ORGAN BOUNDARIES DOMAIN (ASL/LBD) family, is a key regulator of crown root initiation in rice (Oryza sativa). Here, we show that CRL1 can bind, both in vitro and in vivo, not only the LBD-box, a DNA sequence recognized by several ASL/LBD transcription factors, but also another not previously identified DNA motif that was named CRL1-box. Using rice protoplast transient transactivation assays and a set of previously identified CRL1-regulated genes, we confirm that CRL1 transactivates these genes if they possess at least a CRL1-box or an LBD-box in their promoters. In planta, ChIP-qPCR experiments targeting two of these genes that include both a CRL1- and an LBD-box in their promoter show that CRL1 binds preferentially to the LBD-box in these promoter contexts. CRISPR/Cas9-targeted mutation of these two CRL1-regulated genes, which encode a plant Rho GTPase (OsROP) and a basic helix-loop-helix transcription factor (OsbHLH044), show that both promote crown root development. Finally, we show that OsbHLH044 represses a regulatory module, uncovering how CRL1 regulates specific processes during crown root formation. |
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| Journal | Plant J. | |
| Country | French Republic | |
| Volume | 111(2) | |
| Pages | 546-566 | |
| Year | 2022 | |
| PubMed ID | 35596715 | |
| PubMed Central ID | 9542200 | |
| DOI | 10.1111/tpj.15838 | |
| URL | - | |
| Relation | ||
| Gene | BHLH44 CRL1 CTB5 QHB ROC4 _ | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
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Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
